1 files changed, 15 insertions, 4 deletions
diff --git a/java/awt/dnd/DropTarget.java b/java/awt/dnd/DropTarget.java
index a3650567f..1e7b2c4cd 100644
--- a/java/awt/dnd/DropTarget.java
+++ b/java/awt/dnd/DropTarget.java
@@ -45,6 +45,7 @@ import java.awt.GraphicsEnvironment;
 import java.awt.HeadlessException;
 import java.awt.Point;
 import java.awt.datatransfer.FlavorMap;
+import java.awt.datatransfer.SystemFlavorMap;
 import java.awt.dnd.peer.DropTargetPeer;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
@@ -113,7 +114,7 @@ public class DropTarget
    */
   public DropTarget ()
   {
-    this (null, 0, null, true, null);
+    this (null, DnDConstants.ACTION_COPY_OR_MOVE, null, true, null);
   }
   
   /**
@@ -124,7 +125,7 @@ public class DropTarget
    */
   public DropTarget (Component c, DropTargetListener dtl)
   {
-    this (c, 0, dtl, true, null);
+    this (c, DnDConstants.ACTION_COPY_OR_MOVE, dtl, true, null);
   }
   
   /**
@@ -164,7 +165,11 @@ public class DropTarget
     setComponent(c);
     setDefaultActions(i);
     dropTargetListener = dtl;
-    flavorMap = fm;
+    
+    if (fm == null)
+      flavorMap = SystemFlavorMap.getDefaultFlavorMap();
+    else
+      flavorMap = fm;
     
     setActive (b);
     
@@ -225,8 +230,14 @@ public class DropTarget
   public void addDropTargetListener (DropTargetListener dtl)
     throws TooManyListenersException
   {
+    if (dtl == null)
+      return;
+    
+    if (dtl.equals(this))
+      throw new IllegalArgumentException();
+    
     if (dropTargetListener != null)
-      throw new TooManyListenersException ();
+      throw new TooManyListenersException();
     
     dropTargetListener = dtl;
   }