Index: src/org/netbeans/core/execution/WindowTable.java
===================================================================
RCS file: /cvs/core/execution/src/org/netbeans/core/execution/WindowTable.java,v
retrieving revision 1.2
diff -u -r1.2 WindowTable.java
--- src/org/netbeans/core/execution/WindowTable.java	2 Nov 2002 21:06:21 -0000	1.2
+++ src/org/netbeans/core/execution/WindowTable.java	29 Sep 2003 10:57:01 -0000
@@ -66,7 +66,7 @@
     }
 
     /** closes windows opened by grp ThreadGroup */
-    void closeGroup(ThreadGroup grp) {
+    synchronized void closeGroup(ThreadGroup grp) {
         Window win;
         ArrayList vec = (ArrayList) windowMap.get(grp);
         if (vec == null) return;
@@ -102,7 +102,7 @@
     }
 
     /** return true if the ThreadGroup has any windows */
-    boolean hasWindows(ThreadGroup grp) {
+    synchronized boolean hasWindows(ThreadGroup grp) {
         ArrayList vec = (ArrayList) windowMap.get(grp);
         if ((vec == null) || (vec.size() == 0) || hiddenWindows(vec)) {
             return false;
@@ -127,7 +127,7 @@
     }
 
     /** removes given window */
-    private void removeWindow(Window win) {
+    synchronized private void removeWindow(Window win) {
         Object obj = get(win); // obj is threadgroup
         if (obj == null) return;
         remove(win);