2006-11-22 Tania Bento <tbento@redhat.com>

        * javax/swing/JRootPane.java
        (setLayeredPane): Added documentation; throw
        IllegalComponentStateException if layered pane parameter is null.

2 files changed, 15 insertions, 3 deletions

diff --git a/ChangeLog b/ChangeLog
index 21c792ce9..408829dd2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2006-11-22  Tania Bento  <tbento@redhat.com>
+
+	* javax/swing/JRootPane.java
+	(setLayeredPane): Added documentation; throw 
+	IllegalComponentStateException if layered pane parameter is null.
+
 2006-11-22  David Gilbert  <david.gilbert@object-refinery.com>
 
 	* java/beans/beancontext/BeanContextSupport.java
diff --git a/javax/swing/JRootPane.java b/javax/swing/JRootPane.java
index a2cd9c7a0..10fdf10c0 100644
--- a/javax/swing/JRootPane.java
+++ b/javax/swing/JRootPane.java
@@ -505,15 +505,21 @@ public class JRootPane extends JComponent implements Accessible
   }
 
   /**
-   * DOCUMENT ME!
+   * Set the layered pane for the root pane. 
    *
-   * @param f DOCUMENT ME!
+   * @param f The JLayeredPane to be used.
+   * 
+   * @throws IllegalComponentStateException if JLayeredPane
+   * parameter is null.
    */
   public void setLayeredPane(JLayeredPane f)
   {
+    if (f == null)
+      throw new IllegalComponentStateException();
+    
     if (layeredPane != null)
       remove(layeredPane);
-
+    
     layeredPane = f;
     add(f, -1);
   }