Ausrichtung der GUI-Elemente nach Bildschirmmitte optimiert und als Klasse in utils-package ausgelagert. Feuchtes Durchwischen bei den Imports. Die meisten Warnings sollten bei den GUI-packages damit behoben sein.

27 files changed, 373 insertions, 360 deletions

diff --git a/Dozentenmodul/src/gui/image/CreateImageAllgemein_GUI.java b/Dozentenmodul/src/gui/image/CreateImageAllgemein_GUI.java
index 9435a158..956dea25 100644
--- a/Dozentenmodul/src/gui/image/CreateImageAllgemein_GUI.java
+++ b/Dozentenmodul/src/gui/image/CreateImageAllgemein_GUI.java
@@ -4,41 +4,38 @@ package gui.image;
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
-import java.awt.Dimension;
+import java.awt.Color;
 import java.awt.FlowLayout;
-import java.awt.Toolkit;
-import javax.swing.JFrame;
+import java.awt.Font;
+import java.awt.SystemColor;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+
 import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
+import javax.swing.JSeparator;
+import javax.swing.JTextArea;
+import javax.swing.JTextField;
+import javax.swing.JTextPane;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
-import java.awt.Color;
-import javax.swing.JLabel;
-import java.awt.Font;
-import javax.swing.JTextPane;
-import java.awt.SystemColor;
-import javax.swing.JTextField;
-import java.awt.event.ActionListener;
-import java.awt.event.ActionEvent;
-import javax.swing.JSeparator;
-import javax.swing.JMenuBar;
-import javax.swing.JMenu;
-import javax.swing.JMenuItem;
-
-import java.awt.event.WindowAdapter;
-import java.awt.event.WindowEvent;
 import javax.swing.border.TitledBorder;
-import javax.swing.JTextArea;
 
 import models.Image;
 import models.Links;
 import models.person;
-
-import java.awt.event.MouseAdapter;
-import java.awt.event.MouseEvent;
-import java.io.IOException;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class CreateImageAllgemein_GUI extends JFrame {
@@ -83,10 +80,8 @@ public class CreateImageAllgemein_GUI extends JFrame {
 		//Setzt den Titel
 		setTitle("bwLehrpool Suite *Prototyp* - Image erzeugen");
 		//Zentriert das Fenster
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top=(screenSize.height - 722) / 2;
-		int left=(screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 
 		getContentPane().setLayout(null);
 		{
diff --git a/Dozentenmodul/src/gui/image/CreateImageFreigabe_GUI.java b/Dozentenmodul/src/gui/image/CreateImageFreigabe_GUI.java
index 99381c5d..38991942 100644
--- a/Dozentenmodul/src/gui/image/CreateImageFreigabe_GUI.java
+++ b/Dozentenmodul/src/gui/image/CreateImageFreigabe_GUI.java
@@ -3,38 +3,38 @@ package gui.image;
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
-import java.awt.Dimension;
-import java.awt.FlowLayout;
-import java.awt.Toolkit;
-import javax.swing.JFrame;
-import javax.swing.JButton;
-import javax.swing.JPanel;
-import javax.swing.UIManager;
-import javax.swing.UnsupportedLookAndFeelException;
-import javax.swing.border.EmptyBorder;
 import java.awt.Color;
-import javax.swing.JLabel;
+import java.awt.FlowLayout;
 import java.awt.Font;
-import javax.swing.JTextPane;
 import java.awt.SystemColor;
-import java.awt.event.ActionListener;
 import java.awt.event.ActionEvent;
-import javax.swing.JSeparator;
-import javax.swing.JMenuBar;
-import javax.swing.JMenu;
-import javax.swing.JMenuItem;
-import java.awt.event.WindowAdapter;
-import java.awt.event.WindowEvent;
-import javax.swing.border.TitledBorder;
+import java.awt.event.ActionListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
 import java.io.IOException;
+
 import javax.swing.ButtonGroup;
+import javax.swing.DefaultComboBoxModel;
+import javax.swing.JButton;
+import javax.swing.JComboBox;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
+import javax.swing.JPanel;
+import javax.swing.JSeparator;
+import javax.swing.JTextPane;
+import javax.swing.UIManager;
+import javax.swing.UnsupportedLookAndFeelException;
+import javax.swing.border.EmptyBorder;
+import javax.swing.border.TitledBorder;
 
 import models.Image;
 import models.Links;
-import javax.swing.JComboBox;
-import javax.swing.DefaultComboBoxModel;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class CreateImageFreigabe_GUI extends JFrame {
@@ -65,11 +65,10 @@ public class CreateImageFreigabe_GUI extends JFrame {
 			e.printStackTrace();
 		}
 		setTitle("bwLehrpool Suite *Prototyp* - Image erzeugen");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
-		// setBounds(100, 100, 603, 722);
+
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
+		
 		getContentPane().setLayout(null);
 		{
 			JPanel panel = new JPanel();
diff --git a/Dozentenmodul/src/gui/image/CreateImageTechnisch_GUI.java b/Dozentenmodul/src/gui/image/CreateImageTechnisch_GUI.java
index 91ba9573..ebcbcaec 100644
--- a/Dozentenmodul/src/gui/image/CreateImageTechnisch_GUI.java
+++ b/Dozentenmodul/src/gui/image/CreateImageTechnisch_GUI.java
@@ -4,41 +4,39 @@ package gui.image;
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
-import java.awt.Dimension;
-import java.awt.FlowLayout;
-import java.awt.Toolkit;
-import javax.swing.JFrame;
-import javax.swing.JButton;
-import javax.swing.JPanel;
-import javax.swing.UIManager;
-import javax.swing.UnsupportedLookAndFeelException;
-import javax.swing.border.EmptyBorder;
 import java.awt.Color;
-import javax.swing.JLabel;
+import java.awt.FlowLayout;
 import java.awt.Font;
-import javax.swing.JTextPane;
 import java.awt.SystemColor;
-import java.awt.event.ActionListener;
 import java.awt.event.ActionEvent;
-import javax.swing.JSeparator;
-import javax.swing.JMenuBar;
-import javax.swing.JMenu;
-import javax.swing.JMenuItem;
-import java.awt.event.WindowAdapter;
-import java.awt.event.WindowEvent;
-import javax.swing.border.TitledBorder;
-import javax.swing.JTextArea;
+import java.awt.event.ActionListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
-import java.io.IOException;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
 
-import javax.swing.JRadioButton;
 import javax.swing.ButtonGroup;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
+import javax.swing.JPanel;
+import javax.swing.JRadioButton;
+import javax.swing.JSeparator;
 import javax.swing.JSpinner;
+import javax.swing.JTextArea;
+import javax.swing.JTextPane;
 import javax.swing.SpinnerNumberModel;
+import javax.swing.UIManager;
+import javax.swing.UnsupportedLookAndFeelException;
+import javax.swing.border.EmptyBorder;
+import javax.swing.border.TitledBorder;
 
 import models.Image;
 import models.Links;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class CreateImageTechnisch_GUI extends JFrame {
@@ -75,11 +73,10 @@ public class CreateImageTechnisch_GUI extends JFrame {
 			e.printStackTrace();
 		}
 		setTitle("bwLehrpool Suite *Prototyp* - Image erzeugen");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top=(screenSize.height - 722) / 2;
-		int left=(screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
-		//setBounds(100, 100, 603, 722);
+
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
+		
 		getContentPane().setLayout(null);
 		{
 			JPanel panel = new JPanel();
diff --git a/Dozentenmodul/src/gui/image/DeleteImage_GUI.java b/Dozentenmodul/src/gui/image/DeleteImage_GUI.java
index 45edb67a..2c748679 100644
--- a/Dozentenmodul/src/gui/image/DeleteImage_GUI.java
+++ b/Dozentenmodul/src/gui/image/DeleteImage_GUI.java
@@ -2,15 +2,12 @@ package gui.image;
 
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
-import gui.lecture.ExtendedSearchForImages_GUI;
+
 import java.awt.Color;
-import java.awt.Desktop;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.HeadlessException;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.KeyAdapter;
@@ -19,11 +16,9 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
-import java.net.URISyntaxException;
-import java.net.URL;
 import java.util.Iterator;
 import java.util.List;
+
 import javax.swing.JButton;
 import javax.swing.JComboBox;
 import javax.swing.JFrame;
@@ -40,6 +35,7 @@ import javax.swing.JTabbedPane;
 import javax.swing.JTable;
 import javax.swing.JTextField;
 import javax.swing.JTextPane;
+import javax.swing.ListSelectionModel;
 import javax.swing.RowFilter;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
@@ -50,12 +46,15 @@ import javax.swing.event.ChangeListener;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.TableModel;
 import javax.swing.table.TableRowSorter;
+
 import models.Links;
 import models.person;
+
 import org.apache.thrift.TException;
+
 import server.Server.Client;
 import thrift.ThriftConnection;
-import javax.swing.ListSelectionModel;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class DeleteImage_GUI extends JFrame {
@@ -114,10 +113,8 @@ public class DeleteImage_GUI extends JFrame {
 		// Setzt den Fenstertitel
 		setTitle("bwLehrpool Suite *Prototyp* - Image l\u00F6schen");
 		// Zentriert das Fenster in die Bildmitte
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
 
diff --git a/Dozentenmodul/src/gui/image/EditImageAllgemein_GUI.java b/Dozentenmodul/src/gui/image/EditImageAllgemein_GUI.java
index 2ed1fc3c..d9b29d91 100644
--- a/Dozentenmodul/src/gui/image/EditImageAllgemein_GUI.java
+++ b/Dozentenmodul/src/gui/image/EditImageAllgemein_GUI.java
@@ -4,22 +4,17 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
-import java.awt.Desktop;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
-import java.net.URISyntaxException;
-import java.net.URL;
 import java.util.Map;
+
 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
@@ -36,12 +31,16 @@ import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
-import org.apache.thrift.TException;
+
 import models.Image;
 import models.Links;
 import models.person;
+
+import org.apache.thrift.TException;
+
 import server.Server.Client;
 import thrift.ThriftConnection;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class EditImageAllgemein_GUI extends JFrame {
@@ -88,10 +87,8 @@ public class EditImageAllgemein_GUI extends JFrame {
 		setTitle("bwLehrpool Suite *Prototyp* - Image bearbeiten");
 
 		// Zentriert das Fenster in der Bildmitte
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 		initData();
 		getContentPane().setLayout(null);
 		{
diff --git a/Dozentenmodul/src/gui/image/EditImageFreigabe_GUI.java b/Dozentenmodul/src/gui/image/EditImageFreigabe_GUI.java
index 71b3aa15..94ec06a6 100644
--- a/Dozentenmodul/src/gui/image/EditImageFreigabe_GUI.java
+++ b/Dozentenmodul/src/gui/image/EditImageFreigabe_GUI.java
@@ -4,43 +4,38 @@ package gui.image;
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
-import java.awt.Dimension;
-import java.awt.FlowLayout;
-import java.awt.Toolkit;
-import javax.swing.JFrame;
-import javax.swing.JButton;
-import javax.swing.JPanel;
-import javax.swing.UIManager;
-import javax.swing.UnsupportedLookAndFeelException;
-import javax.swing.border.EmptyBorder;
 import java.awt.Color;
-import javax.swing.JLabel;
+import java.awt.FlowLayout;
 import java.awt.Font;
-import javax.swing.JTextPane;
 import java.awt.SystemColor;
-import java.awt.event.ActionListener;
 import java.awt.event.ActionEvent;
-import javax.swing.JSeparator;
-import javax.swing.JMenuBar;
-import javax.swing.JMenu;
-import javax.swing.JMenuItem;
-import java.awt.event.WindowAdapter;
-import java.awt.event.WindowEvent;
-import javax.swing.border.TitledBorder;
-import javax.swing.JTextArea;
+import java.awt.event.ActionListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
 import java.io.IOException;
 
-import javax.swing.JRadioButton;
 import javax.swing.ButtonGroup;
-import javax.swing.JSpinner;
-import javax.swing.SpinnerNumberModel;
+import javax.swing.DefaultComboBoxModel;
+import javax.swing.JButton;
+import javax.swing.JComboBox;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
+import javax.swing.JPanel;
+import javax.swing.JSeparator;
+import javax.swing.JTextPane;
+import javax.swing.UIManager;
+import javax.swing.UnsupportedLookAndFeelException;
+import javax.swing.border.EmptyBorder;
+import javax.swing.border.TitledBorder;
 
 import models.Image;
 import models.Links;
-import javax.swing.JComboBox;
-import javax.swing.DefaultComboBoxModel;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class EditImageFreigabe_GUI extends JFrame {
@@ -71,11 +66,10 @@ public class EditImageFreigabe_GUI extends JFrame {
 			e.printStackTrace();
 		}
 		setTitle("bwLehrpool Suite *Prototyp* - Image erzeugen");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top=(screenSize.height - 722) / 2;
-		int left=(screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
-		//setBounds(100, 100, 603, 722);
+
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
+
 		getContentPane().setLayout(null);
 		{
 			JPanel panel = new JPanel();
diff --git a/Dozentenmodul/src/gui/image/EditImageTechnisch_GUI.java b/Dozentenmodul/src/gui/image/EditImageTechnisch_GUI.java
index 4945fcd2..4e0140c2 100644
--- a/Dozentenmodul/src/gui/image/EditImageTechnisch_GUI.java
+++ b/Dozentenmodul/src/gui/image/EditImageTechnisch_GUI.java
@@ -4,18 +4,17 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
+
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
+
 
 import javax.swing.ButtonGroup;
 import javax.swing.JButton;
@@ -35,6 +34,8 @@ import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
+
+import util.GuiOrganizer;
 import models.Image;
 import models.Links;
 
@@ -79,10 +80,8 @@ public class EditImageTechnisch_GUI extends JFrame {
 		// Setzt den Titel des Fensters
 		setTitle("bwLehrpool Suite *Prototyp* - Image bearbeiten");
 		// Zentriert das Fenster
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 
 		getContentPane().setLayout(null);
 		{
diff --git a/Dozentenmodul/src/gui/image/FTPCreateUploader_GUI.java b/Dozentenmodul/src/gui/image/FTPCreateUploader_GUI.java
index 11664d25..91e5decb 100644
--- a/Dozentenmodul/src/gui/image/FTPCreateUploader_GUI.java
+++ b/Dozentenmodul/src/gui/image/FTPCreateUploader_GUI.java
@@ -2,28 +2,29 @@ package gui.image;
 
 import java.awt.BorderLayout;
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.io.File;
-import java.io.IOException;
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
 import java.util.Date;
+
 import javax.swing.JButton;
 import javax.swing.JFileChooser;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JMenu;
 import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JProgressBar;
@@ -33,19 +34,20 @@ import javax.swing.SwingConstants;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
+
 import models.Image;
 import models.Links;
 import models.SessionData;
 import models.person;
+
 import org.apache.thrift.TException;
+
 import server.Server.Client;
 import thrift.ThriftConnection;
+import util.GuiOrganizer;
 import ftp.UploadTask;
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
-import javax.swing.JMenuItem;
-import java.awt.event.MouseAdapter;
-import java.awt.event.MouseEvent;
 
 @SuppressWarnings("serial")
 public class FTPCreateUploader_GUI extends JFrame implements
@@ -119,11 +121,10 @@ public class FTPCreateUploader_GUI extends JFrame implements
 		// filename=name;
 		setBackground(Color.WHITE);
 		setTitle("Dozentenmodul *Prototyp* - Image erzeugen");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
-		// setBounds(100, 100, 603, 250);
+
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
+
 		getContentPane().setLayout(new BorderLayout());
 		contentPanel.setBackground(SystemColor.menu);
 		contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
diff --git a/Dozentenmodul/src/gui/image/FTPDownloader_GUI.java b/Dozentenmodul/src/gui/image/FTPDownloader_GUI.java
index a5c973df..87a59a6b 100644
--- a/Dozentenmodul/src/gui/image/FTPDownloader_GUI.java
+++ b/Dozentenmodul/src/gui/image/FTPDownloader_GUI.java
@@ -2,50 +2,49 @@ package gui.image;
 
 import java.awt.BorderLayout;
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
-import java.awt.Toolkit;
+import java.awt.Font;
+import java.awt.SystemColor;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
 import java.io.File;
-import java.io.IOException;
 
 import javax.swing.JButton;
 import javax.swing.JFileChooser;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JProgressBar;
+import javax.swing.JSeparator;
+import javax.swing.JTextPane;
 import javax.swing.SwingConstants;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
-import ftp.DownloadTask;
-import gui.intro.About_GUI;
-import gui.intro.MainMenue_GUI;
 
-import java.awt.event.ActionListener;
-import java.awt.event.ActionEvent;
-import java.beans.PropertyChangeEvent;
-import java.beans.PropertyChangeListener;
-import java.awt.event.WindowAdapter;
-import java.awt.event.WindowEvent;
-import java.awt.SystemColor;
-import java.awt.Font;
-import javax.swing.JTextPane;
-import javax.swing.JSeparator;
 import models.Image;
 import models.Links;
 import models.SessionData;
 
 import org.apache.thrift.TException;
+
 import server.Server.Client;
 import server.User;
 import thrift.ThriftConnection;
-import javax.swing.JMenuBar;
-import javax.swing.JMenu;
-import javax.swing.JMenuItem;
-import java.awt.event.MouseAdapter;
-import java.awt.event.MouseEvent;
+import util.GuiOrganizer;
+import ftp.DownloadTask;
+import gui.intro.About_GUI;
+import gui.intro.MainMenue_GUI;
 
 @SuppressWarnings("serial")
 public class FTPDownloader_GUI extends JFrame implements PropertyChangeListener {
@@ -115,10 +114,10 @@ public class FTPDownloader_GUI extends JFrame implements PropertyChangeListener
 
 		setBackground(Color.WHITE);
 		setTitle("Dozentenmodul *Prototyp* - Image herunterladen");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
+
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
+		
 		getContentPane().setLayout(new BorderLayout());
 		contentPanel.setBackground(SystemColor.menu);
 		contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
diff --git a/Dozentenmodul/src/gui/image/FTPEditUploader_GUI.java b/Dozentenmodul/src/gui/image/FTPEditUploader_GUI.java
index 0df37a95..298ea6ea 100644
--- a/Dozentenmodul/src/gui/image/FTPEditUploader_GUI.java
+++ b/Dozentenmodul/src/gui/image/FTPEditUploader_GUI.java
@@ -2,28 +2,29 @@ package gui.image;
 
 import java.awt.BorderLayout;
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.io.File;
-import java.io.IOException;
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
 import java.util.Date;
+
 import javax.swing.JButton;
 import javax.swing.JFileChooser;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JMenu;
 import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JProgressBar;
@@ -33,19 +34,20 @@ import javax.swing.SwingConstants;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
+
 import models.Image;
 import models.Links;
 import models.SessionData;
 import models.person;
+
 import org.apache.thrift.TException;
+
 import server.Server.Client;
 import thrift.ThriftConnection;
+import util.GuiOrganizer;
 import ftp.UploadTask;
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
-import javax.swing.JMenuItem;
-import java.awt.event.MouseAdapter;
-import java.awt.event.MouseEvent;
 
 @SuppressWarnings("serial")
 public class FTPEditUploader_GUI extends JFrame implements
@@ -116,11 +118,10 @@ public class FTPEditUploader_GUI extends JFrame implements
 		// filename=name;
 		setBackground(Color.WHITE);
 		setTitle("Dozentenmodul *Prototyp* - Image bearbeiten");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
-		// setBounds(100, 100, 603, 250);
+
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
+
 		getContentPane().setLayout(new BorderLayout());
 		contentPanel.setBackground(SystemColor.menu);
 		contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
diff --git a/Dozentenmodul/src/gui/image/SearchEditImage_GUI.java b/Dozentenmodul/src/gui/image/SearchEditImage_GUI.java
index e5e6ad28..11dacd09 100644
--- a/Dozentenmodul/src/gui/image/SearchEditImage_GUI.java
+++ b/Dozentenmodul/src/gui/image/SearchEditImage_GUI.java
@@ -2,13 +2,11 @@ package gui.image;
 
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
-import gui.lecture.ExtendedSearchForImages_GUI;
+
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.KeyAdapter;
@@ -17,9 +15,9 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
 import java.util.Iterator;
 import java.util.List;
+
 import javax.swing.JButton;
 import javax.swing.JComboBox;
 import javax.swing.JFrame;
@@ -46,15 +44,17 @@ import javax.swing.event.ChangeListener;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.TableModel;
 import javax.swing.table.TableRowSorter;
+
 import models.Image;
 import models.Links;
 import models.person;
-//import models.person;
 
 import org.apache.thrift.TException;
 
 import server.Server.Client;
 import thrift.ThriftConnection;
+import util.GuiOrganizer;
+//import models.person;
 
 @SuppressWarnings("serial")
 public class SearchEditImage_GUI extends JFrame {
@@ -122,10 +122,8 @@ public class SearchEditImage_GUI extends JFrame {
 		// Setzt den Fenstertitel
 		setTitle("bwLehrpool Suite *Prototyp* - Image bearbeiten");
 		// Zentriert das Fenster in die Bildmitte
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
 
diff --git a/Dozentenmodul/src/gui/image/SearchImage_GUI.java b/Dozentenmodul/src/gui/image/SearchImage_GUI.java
index 6680d8e7..9c197421 100644
--- a/Dozentenmodul/src/gui/image/SearchImage_GUI.java
+++ b/Dozentenmodul/src/gui/image/SearchImage_GUI.java
@@ -2,13 +2,11 @@ package gui.image;
 
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
-import gui.lecture.ExtendedSearchForImages_GUI;
+
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.KeyAdapter;
@@ -17,9 +15,9 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
 import java.util.Iterator;
 import java.util.List;
+
 import javax.swing.JButton;
 import javax.swing.JComboBox;
 import javax.swing.JFrame;
@@ -46,12 +44,16 @@ import javax.swing.event.ChangeListener;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.TableModel;
 import javax.swing.table.TableRowSorter;
+
 import models.Image;
 import models.Links;
 import models.person;
+
 import org.apache.thrift.TException;
+
 import server.Server.Client;
 import thrift.ThriftConnection;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class SearchImage_GUI extends JFrame {
@@ -116,10 +118,8 @@ public class SearchImage_GUI extends JFrame {
 		// Setzt den Fenstertitel
 		setTitle("bwLehrpool Suite *Prototyp* - Suche VL-Image");
 		// Zentriert das Fenster in die Bildmitte
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
 
diff --git a/Dozentenmodul/src/gui/image/SearchMethodLecture_GUI.java b/Dozentenmodul/src/gui/image/SearchMethodLecture_GUI.java
index c80d9fe1..daef9bae 100644
--- a/Dozentenmodul/src/gui/image/SearchMethodLecture_GUI.java
+++ b/Dozentenmodul/src/gui/image/SearchMethodLecture_GUI.java
@@ -4,18 +4,16 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
+
 import javax.swing.ButtonGroup;
 import javax.swing.JButton;
 import javax.swing.JFrame;
@@ -32,7 +30,9 @@ import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
+
 import models.Links;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class SearchMethodLecture_GUI extends JFrame {
@@ -65,11 +65,10 @@ public class SearchMethodLecture_GUI extends JFrame {
 			e.printStackTrace();
 		}
 		setTitle("bwLehrpool Suite *Prototyp* - Suchmethode w\u00E4hlen");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 603) / 2;
-		int left = (screenSize.width - 722) / 2;
-		setBounds(left, top, 603, 722);
-		// setBounds(100, 100, 603, 722);
+
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
+		
 		getContentPane().setLayout(null);
 		{
 			JPanel panel = new JPanel();
diff --git a/Dozentenmodul/src/gui/intro/About_GUI.java b/Dozentenmodul/src/gui/intro/About_GUI.java
index 99398ca1..447f18ee 100644
--- a/Dozentenmodul/src/gui/intro/About_GUI.java
+++ b/Dozentenmodul/src/gui/intro/About_GUI.java
@@ -1,21 +1,22 @@
 package gui.intro;
 
-import java.awt.Dimension;
 import java.awt.Image;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+
 import javax.swing.ImageIcon;
 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
+import javax.swing.JTextPane;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
-import javax.swing.JTextPane;
+
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class About_GUI extends JFrame {
@@ -46,10 +47,8 @@ public class About_GUI extends JFrame {
 		// Aktion die beim Schliessen durchgefuehrt werden soll
 		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
 		// Groesse des Fensters definieren
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 309) / 2;
-		int left = (screenSize.width - 355) / 2;
-		setBounds(left, top, 355, 309);
+		setBounds(0, 0, 355, 309);
+		GuiOrganizer.centerGUI(this);
 		// Erzeugen eines Panels
 		contentPane = new JPanel();
 		// Hintergrund Farbe des Panels setzen
diff --git a/Dozentenmodul/src/gui/intro/BillOfRights_GUI.java b/Dozentenmodul/src/gui/intro/BillOfRights_GUI.java
index 652cca80..2cd45f08 100644
--- a/Dozentenmodul/src/gui/intro/BillOfRights_GUI.java
+++ b/Dozentenmodul/src/gui/intro/BillOfRights_GUI.java
@@ -1,13 +1,13 @@
 package gui.intro;
 
 
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.io.File;
@@ -37,8 +37,8 @@ import models.Links;
 
 import org.ini4j.InvalidFileFormatException;
 import org.ini4j.Wini;
-import java.awt.event.MouseAdapter;
-import java.awt.event.MouseEvent;
+
+import util.GuiOrganizer;
 
 
 
@@ -75,10 +75,8 @@ public class BillOfRights_GUI extends JFrame {
 		setTitle("bwLehrpool Suite *Prototyp*");
 		
 		//Zentiert das Fenster in der Bildschirmmitte
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top=(screenSize.height - 722) / 2;
-		int left=(screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 		
 		getContentPane().setLayout(null);
 		{
diff --git a/Dozentenmodul/src/gui/intro/Login_GUI.java b/Dozentenmodul/src/gui/intro/Login_GUI.java
index 5b47f4e0..06a87307 100644
--- a/Dozentenmodul/src/gui/intro/Login_GUI.java
+++ b/Dozentenmodul/src/gui/intro/Login_GUI.java
@@ -1,17 +1,16 @@
 package gui.intro;
 
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.EventQueue;
 import java.awt.Image;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.io.File;
 import java.io.IOException;
+
 import javax.swing.ImageIcon;
 import javax.swing.JButton;
 import javax.swing.JFrame;
@@ -20,19 +19,23 @@ import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JPasswordField;
 import javax.swing.JTextField;
+import javax.swing.SwingConstants;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
+
 import models.SessionData;
 import models.person;
+
 import org.apache.thrift.TException;
 import org.ini4j.Wini;
-import thrift.MasterThriftConnection;
+
 import thrift.ImageServer.Client;
+import thrift.MasterThriftConnection;
 import thrift.ThriftConnection;
 import thrift.UserInfo;
+import util.GuiOrganizer;
 import config.config_file;
-import javax.swing.SwingConstants;
 
 @SuppressWarnings("serial")
 public class Login_GUI extends JFrame {
@@ -106,11 +109,11 @@ public class Login_GUI extends JFrame {
 		setTitle("Dozentenmodul *Prototyp*");
 		// Aktion die beim Schliessen durchgefuehrt werden soll
 		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-		// Groesse des Fensters definieren
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 400) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 400);
+
+		//Größe setzen und mittig ausrichten
+		setBounds(0, 0, 603, 400);
+		GuiOrganizer.centerGUI(this);
+		
 		// Erzeugen eines Panels
 		contentPane = new JPanel();
 		// Hintergrund Farbe des Panels setzen
@@ -182,6 +185,7 @@ public class Login_GUI extends JFrame {
 		lblConnectionInfo.setHorizontalAlignment(SwingConstants.LEFT);
 		lblConnectionInfo.setBounds(292, 290, 237, 20);
 		contentPane.add(lblConnectionInfo);
+		//GuiOrganizer.centerGUI(this);
 	}// end LoginGUI()
 
 	// Versuche den Benutzer einzuloggen
diff --git a/Dozentenmodul/src/gui/intro/MainMenue_GUI.java b/Dozentenmodul/src/gui/intro/MainMenue_GUI.java
index 59bd561b..abce5001 100644
--- a/Dozentenmodul/src/gui/intro/MainMenue_GUI.java
+++ b/Dozentenmodul/src/gui/intro/MainMenue_GUI.java
@@ -1,40 +1,48 @@
 package gui.intro;
 
-import gui.image.*;
-import gui.lecture.*;
-import java.awt.Dimension;
+import gui.image.CreateImageAllgemein_GUI;
+import gui.image.DeleteImage_GUI;
+import gui.image.SearchEditImage_GUI;
+import gui.image.SearchImage_GUI;
+import gui.lecture.CreateLectureAllgemein_GUI;
+import gui.lecture.DeleteLecture_GUI;
+import gui.lecture.EditLectureSearch_GUI;
+import gui.lecture.SearchLecture_GUI;
+
 import java.awt.FlowLayout;
-import java.awt.Toolkit;
-import javax.swing.JFrame;
-import javax.swing.JButton;
-import javax.swing.JPanel;
-import javax.swing.UIManager;
-import javax.swing.UnsupportedLookAndFeelException;
-import javax.swing.border.EmptyBorder;
-import javax.swing.JLabel;
 import java.awt.Font;
-import javax.swing.JTextPane;
+import java.awt.ScrollPane;
 import java.awt.SystemColor;
-import java.awt.event.ActionListener;
 import java.awt.event.ActionEvent;
-import javax.swing.JSeparator;
-import javax.swing.JRadioButton;
-import javax.swing.SwingConstants;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+
 import javax.swing.ButtonGroup;
-import javax.swing.JMenuBar;
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
 import javax.swing.JMenu;
+import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;
+import javax.swing.JPanel;
+import javax.swing.JRadioButton;
+import javax.swing.JSeparator;
+import javax.swing.JTextArea;
+import javax.swing.JTextPane;
+import javax.swing.SwingConstants;
 import javax.swing.ToolTipManager;
-import java.awt.event.WindowAdapter;
-import java.awt.event.WindowEvent;
+import javax.swing.UIManager;
+import javax.swing.UnsupportedLookAndFeelException;
+import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
-import java.awt.ScrollPane;
-import javax.swing.JTextArea;
-import javax.swing.ImageIcon;
+
 import models.Links;
 import models.SessionData;
-import java.awt.event.MouseAdapter;
-import java.awt.event.MouseEvent;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class MainMenue_GUI extends JFrame {
@@ -74,11 +82,9 @@ public class MainMenue_GUI extends JFrame {
 			e.printStackTrace();
 		}
 		setTitle("bwLehrpool Suite *Prototyp*  - Connected Server: "+SessionData.session.getServerAdress());
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
-		// setBounds(100, 100, 545, 366);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
+
 		getContentPane().setLayout(null);
 		{
 			JPanel panel = new JPanel();
diff --git a/Dozentenmodul/src/gui/intro/VmWareLink_GUI.java b/Dozentenmodul/src/gui/intro/VmWareLink_GUI.java
index 59f47f4b..cfe046ad 100644
--- a/Dozentenmodul/src/gui/intro/VmWareLink_GUI.java
+++ b/Dozentenmodul/src/gui/intro/VmWareLink_GUI.java
@@ -2,41 +2,44 @@ package gui.intro;
 
 
 import java.awt.Desktop;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
-import java.awt.Toolkit;
-import javax.swing.JFrame;
-import javax.swing.JButton;
-import javax.swing.JOptionPane;
-import javax.swing.JPanel;
-import javax.swing.UIManager;
-import javax.swing.UnsupportedLookAndFeelException;
-import javax.swing.border.EmptyBorder;
-import javax.swing.JLabel;
 import java.awt.Font;
-import javax.swing.JTextPane;
 import java.awt.SystemColor;
-import java.awt.event.ActionListener;
 import java.awt.event.ActionEvent;
-import javax.swing.JSeparator;
-import javax.swing.JMenuBar;
-import javax.swing.JMenu;
-import javax.swing.JMenuItem;
+import java.awt.event.ActionListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
 import java.io.File;
 import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
-import java.awt.event.WindowAdapter;
-import java.awt.event.WindowEvent;
+
+import javax.swing.JButton;
 import javax.swing.JCheckBox;
-import javax.swing.event.ChangeListener;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JSeparator;
+import javax.swing.JTextPane;
+import javax.swing.UIManager;
+import javax.swing.UnsupportedLookAndFeelException;
+import javax.swing.border.EmptyBorder;
 import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+
 import models.Links;
+
 import org.ini4j.InvalidFileFormatException;
 import org.ini4j.Wini;
 
+import util.GuiOrganizer;
+
 
 @SuppressWarnings("serial")
 public class VmWareLink_GUI extends JFrame {
@@ -65,11 +68,9 @@ public class VmWareLink_GUI extends JFrame {
 			e.printStackTrace();
 		}
 		setTitle("Dozentenmodul *Prototyp*");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top=(screenSize.height - 722) / 2;
-		int left=(screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
-		//setBounds(100, 100, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
+
 		getContentPane().setLayout(null);
 		{
 			JPanel panel = new JPanel();
diff --git a/Dozentenmodul/src/gui/lecture/CreateLectureAllgemein_GUI.java b/Dozentenmodul/src/gui/lecture/CreateLectureAllgemein_GUI.java
index 1ddcc513..bf0a99be 100644
--- a/Dozentenmodul/src/gui/lecture/CreateLectureAllgemein_GUI.java
+++ b/Dozentenmodul/src/gui/lecture/CreateLectureAllgemein_GUI.java
@@ -2,18 +2,21 @@ package gui.lecture;
 
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
+
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
+import java.awt.ScrollPane;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
+import java.util.Calendar;
+import java.util.Date;
+
 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
@@ -22,24 +25,23 @@ import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
+import javax.swing.JRadioButton;
 import javax.swing.JSeparator;
+import javax.swing.JTextArea;
 import javax.swing.JTextField;
 import javax.swing.JTextPane;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
+
 import models.Image;
 import models.Lecture;
 import models.Links;
 import models.person;
-import javax.swing.JTextArea;
-import java.awt.ScrollPane;
-import java.io.IOException;
-import java.util.Calendar;
-import java.util.Date;
+import util.GuiOrganizer;
+
 import com.toedter.calendar.JDateChooser;
-import javax.swing.JRadioButton;
 
 @SuppressWarnings("serial")
 public class CreateLectureAllgemein_GUI extends JFrame {
@@ -89,11 +91,9 @@ public class CreateLectureAllgemein_GUI extends JFrame {
 			e.printStackTrace();
 		}
 		setTitle("bwLehrpool Suite *Prototyp* - Veranstaltung erzeugen");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
-		// setBounds(100, 100, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
+
 		getContentPane().setLayout(null);
 		{
 			JPanel panel = new JPanel();
diff --git a/Dozentenmodul/src/gui/lecture/CreateLectureLink_GUI.java b/Dozentenmodul/src/gui/lecture/CreateLectureLink_GUI.java
index 65006327..54c467c5 100644
--- a/Dozentenmodul/src/gui/lecture/CreateLectureLink_GUI.java
+++ b/Dozentenmodul/src/gui/lecture/CreateLectureLink_GUI.java
@@ -2,12 +2,11 @@ package gui.lecture;
 
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
+
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.KeyAdapter;
@@ -16,12 +15,12 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
+
 import javax.swing.JButton;
 import javax.swing.JComboBox;
 import javax.swing.JFrame;
@@ -43,12 +42,16 @@ import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
 import javax.swing.table.DefaultTableModel;
+
 import models.Lecture;
 import models.Links;
 import models.person;
+
 import org.apache.thrift.TException;
+
 import server.Server.Client;
 import thrift.ThriftConnection;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class CreateLectureLink_GUI extends JFrame {
@@ -96,10 +99,8 @@ public class CreateLectureLink_GUI extends JFrame {
 			e.printStackTrace();
 		}
 		setTitle("bwLehrpool Suite *Prototyp* - Veranstaltung erzeugen");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 603) / 2;
-		int left = (screenSize.width - 722) / 2;
-		setBounds(left, top, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 
 		final DefaultTableModel modelAll = new DefaultTableModel(titles, 0);
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
diff --git a/Dozentenmodul/src/gui/lecture/DeleteLecture_GUI.java b/Dozentenmodul/src/gui/lecture/DeleteLecture_GUI.java
index 2e4d5acf..06c6b6ac 100644
--- a/Dozentenmodul/src/gui/lecture/DeleteLecture_GUI.java
+++ b/Dozentenmodul/src/gui/lecture/DeleteLecture_GUI.java
@@ -2,12 +2,11 @@ package gui.lecture;
 
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
+
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.KeyAdapter;
@@ -16,9 +15,9 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
 import java.util.Iterator;
 import java.util.List;
+
 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
@@ -44,11 +43,15 @@ import javax.swing.event.ChangeListener;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.TableModel;
 import javax.swing.table.TableRowSorter;
+
 import models.Links;
 import models.person;
+
 import org.apache.thrift.TException;
+
 import server.Server.Client;
 import thrift.ThriftConnection;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class DeleteLecture_GUI extends JFrame {
@@ -104,10 +107,8 @@ public class DeleteLecture_GUI extends JFrame {
 		// Setzt den Fenstertitel
 		setTitle("bwLehrpool Suite *Prototyp* - Veranstaltung l\u00F6schen");
 		// Zentriert das Fenster in die Bildmitte
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
 
diff --git a/Dozentenmodul/src/gui/lecture/EditLectureAllgemein_GUI.java b/Dozentenmodul/src/gui/lecture/EditLectureAllgemein_GUI.java
index bf745a25..1c92026b 100644
--- a/Dozentenmodul/src/gui/lecture/EditLectureAllgemein_GUI.java
+++ b/Dozentenmodul/src/gui/lecture/EditLectureAllgemein_GUI.java
@@ -5,17 +5,18 @@ import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
 
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
+import java.awt.ScrollPane;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
+
+import javax.swing.ButtonGroup;
 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
@@ -23,23 +24,23 @@ import javax.swing.JMenu;
 import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;
 import javax.swing.JPanel;
+import javax.swing.JRadioButton;
 import javax.swing.JSeparator;
+import javax.swing.JTextArea;
 import javax.swing.JTextField;
 import javax.swing.JTextPane;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
+
 import models.Image;
 import models.Lecture;
 import models.Links;
 import models.person;
-import javax.swing.JTextArea;
-import java.awt.ScrollPane;
-import java.io.IOException;
+import util.GuiOrganizer;
+
 import com.toedter.calendar.JDateChooser;
-import javax.swing.JRadioButton;
-import javax.swing.ButtonGroup;
 
 
 @SuppressWarnings("serial")
@@ -79,12 +80,10 @@ public class EditLectureAllgemein_GUI extends JFrame {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
 		}
-		setTitle("bwLehrpool Suite *Prototyp* - Veranstaltung bearbeiten");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top=(screenSize.height - 722) / 2;
-		int left=(screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
-		//setBounds(100, 100, 603, 722);
+		setTitle("bwLehrpool Suite *Prototyp* - Veranstaltung bearbeiten");;
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
+
 		getContentPane().setLayout(null);
 		{
 			JPanel panel = new JPanel();
diff --git a/Dozentenmodul/src/gui/lecture/EditLectureLink_GUI.java b/Dozentenmodul/src/gui/lecture/EditLectureLink_GUI.java
index ed99850e..439c5b41 100644
--- a/Dozentenmodul/src/gui/lecture/EditLectureLink_GUI.java
+++ b/Dozentenmodul/src/gui/lecture/EditLectureLink_GUI.java
@@ -2,12 +2,11 @@ package gui.lecture;
 
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
+
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.KeyAdapter;
@@ -16,12 +15,12 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
+
 import javax.swing.JButton;
 import javax.swing.JComboBox;
 import javax.swing.JFrame;
@@ -43,12 +42,16 @@ import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
 import javax.swing.table.DefaultTableModel;
+
 import models.Lecture;
 import models.Links;
 import models.person;
+
 import org.apache.thrift.TException;
+
 import server.Server.Client;
 import thrift.ThriftConnection;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class EditLectureLink_GUI extends JFrame {
@@ -90,10 +93,9 @@ public class EditLectureLink_GUI extends JFrame {
 			e.printStackTrace();
 		}
 		setTitle("bwLehrpool Suite *Prototyp* - Veranstaltung bearbeiten");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 603) / 2;
-		int left = (screenSize.width - 722) / 2;
-		setBounds(left, top, 603, 722);
+		
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 
 		final DefaultTableModel modelAll = new DefaultTableModel(titles, 0);
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
diff --git a/Dozentenmodul/src/gui/lecture/EditLectureSearch_GUI.java b/Dozentenmodul/src/gui/lecture/EditLectureSearch_GUI.java
index 43e70bd2..a6436ebf 100644
--- a/Dozentenmodul/src/gui/lecture/EditLectureSearch_GUI.java
+++ b/Dozentenmodul/src/gui/lecture/EditLectureSearch_GUI.java
@@ -2,12 +2,11 @@ package gui.lecture;
 
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
+
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.KeyAdapter;
@@ -16,12 +15,12 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
 import java.text.DateFormat;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Iterator;
 import java.util.List;
+
 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
@@ -47,12 +46,16 @@ import javax.swing.event.ChangeListener;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.TableModel;
 import javax.swing.table.TableRowSorter;
+
 import models.Lecture;
 import models.Links;
 import models.person;
+
 import org.apache.thrift.TException;
+
 import server.Server.Client;
 import thrift.ThriftConnection;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class EditLectureSearch_GUI extends JFrame {
@@ -115,10 +118,8 @@ public class EditLectureSearch_GUI extends JFrame {
 		// Setzt den Fenstertitel
 		setTitle("bwLehrpool Suite *Prototyp* - Veranstaltung bearbeiten");
 		// Zentriert das Fenster in die Bildmitte
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
 
diff --git a/Dozentenmodul/src/gui/lecture/ExtendedSearchForImages_GUI.java b/Dozentenmodul/src/gui/lecture/ExtendedSearchForImages_GUI.java
index cb90fcf0..d0a18bb7 100644
--- a/Dozentenmodul/src/gui/lecture/ExtendedSearchForImages_GUI.java
+++ b/Dozentenmodul/src/gui/lecture/ExtendedSearchForImages_GUI.java
@@ -5,13 +5,14 @@ import gui.image.CreateImageAllgemein_GUI;
 import gui.image.FTPCreateUploader_GUI;
 import gui.intro.About_GUI;
 
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
 import javax.swing.JButton;
 import javax.swing.JCheckBox;
 import javax.swing.JComboBox;
@@ -28,10 +29,9 @@ import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.border.EmptyBorder;
 import javax.swing.border.TitledBorder;
+
 import models.Links;
-import java.awt.event.MouseAdapter;
-import java.awt.event.MouseEvent;
-import java.io.IOException;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class ExtendedSearchForImages_GUI extends JFrame {
@@ -57,10 +57,8 @@ public class ExtendedSearchForImages_GUI extends JFrame {
 			e.printStackTrace();
 		}
 		setTitle("bwLehrpool Suite *Prototyp* - Erweiterte Suche");
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top=(screenSize.height - 722) / 2;
-		int left=(screenSize.width -603) / 2;
-		setBounds(left, top, 603, 722);
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 
 		getContentPane().setLayout(null);
 		{
diff --git a/Dozentenmodul/src/gui/lecture/SearchLecture_GUI.java b/Dozentenmodul/src/gui/lecture/SearchLecture_GUI.java
index 3fe80d68..841d17df 100644
--- a/Dozentenmodul/src/gui/lecture/SearchLecture_GUI.java
+++ b/Dozentenmodul/src/gui/lecture/SearchLecture_GUI.java
@@ -2,12 +2,11 @@ package gui.lecture;
 
 import gui.intro.About_GUI;
 import gui.intro.MainMenue_GUI;
+
 import java.awt.Color;
-import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.SystemColor;
-import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.KeyAdapter;
@@ -16,9 +15,9 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
-import java.io.IOException;
 import java.util.Iterator;
 import java.util.List;
+
 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
@@ -43,11 +42,15 @@ import javax.swing.event.ChangeListener;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.TableModel;
 import javax.swing.table.TableRowSorter;
+
 import models.Links;
 import models.person;
+
 import org.apache.thrift.TException;
+
 import server.Server.Client;
 import thrift.ThriftConnection;
+import util.GuiOrganizer;
 
 @SuppressWarnings("serial")
 public class SearchLecture_GUI extends JFrame {
@@ -109,11 +112,9 @@ public class SearchLecture_GUI extends JFrame {
 		}
 		// Setzt den Fenstertitel
 		setTitle("bwLehrpool Suite *Prototyp* - Veranstaltung suchen");
-		// Zentriert das Fenster in die Bildmitte
-		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
-		int top = (screenSize.height - 722) / 2;
-		int left = (screenSize.width - 603) / 2;
-		setBounds(left, top, 603, 722);
+		// Zentriert das Fenster in die Bildmitte 2;
+		setBounds(0, 0, 603, 722);
+		GuiOrganizer.centerGUI(this);
 
 		final DefaultTableModel model = new DefaultTableModel(titles, 0);
 
diff --git a/Dozentenmodul/src/util/GuiOrganizer.java b/Dozentenmodul/src/util/GuiOrganizer.java
new file mode 100644
index 00000000..f03c3811
--- /dev/null
+++ b/Dozentenmodul/src/util/GuiOrganizer.java
@@ -0,0 +1,26 @@
+package util;
+
+import java.awt.Dimension;
+import java.awt.Toolkit;
+import java.awt.Window;
+
+public abstract class GuiOrganizer {
+	
+
+	
+	
+	/*receive GUI, set it to center of the screen*/
+    public static void centerGUI(Window gui)
+    {
+        Dimension dm = Toolkit.getDefaultToolkit().getScreenSize();
+        double width = dm.getWidth();
+        double height = dm.getHeight();
+        double xPosition = (width / 2 - gui.getWidth() / 2);
+        double yPosition = (height / 2 - gui.getHeight() / 2);
+        gui.setLocation((int) xPosition, (int) yPosition);
+    }
+
+	
+    
+	
+}