[client] Fix warnings and replace deprecated methods

1 files changed, 7 insertions, 3 deletions

diff --git a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/MainWindow.java b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/MainWindow.java
index f65c650d..e481ecd1 100644
--- a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/MainWindow.java
+++ b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/MainWindow.java
@@ -110,13 +110,12 @@ public abstract class MainWindow {
 		return page;
 	}
 
-	@SuppressWarnings("unchecked")
 	public static <T extends CompositePage> T getPage(Class<T> clazz) {
 		CompositePage page = pages.get(clazz);
 		if (page == null) {
 			return null;
 		}
-		return (T) page;
+		return clazz.cast(page);
 	}
 
 	public static void centerShell(Window shell) {
@@ -617,8 +616,13 @@ public abstract class MainWindow {
 		}, 10, 2001);
 	}
 
-	@SuppressWarnings("serial")
 	private static class PleaseWait extends CompositePage {
+
+		/**
+		 * Version for serialization.
+		 */
+		private static final long serialVersionUID = 52617524175943671L;
+
 		public PleaseWait() {
 			GridManager grid = new GridManager(this, 3);
 			grid.add(Box.createHorizontalGlue()).expand(true, true);