more progress towards GNU Classpath compatibility

classpath/java/lang/ThreadGroup.java

@@ -0,0 +1,35 @@
+/* Copyright (c) 2009, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
+package java.lang;
+
+public class ThreadGroup implements Thread.UncaughtExceptionHandler {
+  private final ThreadGroup parent;
+  private final String name;
+
+  public ThreadGroup(ThreadGroup parent, String name) {
+    this.parent = parent;
+    this.name = name;
+  }
+
+  public void uncaughtException(Thread t, Throwable e) {
+    if (parent != null) {
+      parent.uncaughtException(t, e);
+    } else {
+      Thread.UncaughtExceptionHandler deh
+        = Thread.getDefaultUncaughtExceptionHandler();
+      if (deh != null) {
+        deh.uncaughtException(t, e);
+      } else if (! (e instanceof ThreadDeath)) {
+        e.printStackTrace();
+      }
+    }
+  }
+}