diff -r 3f971d6907b7 Lib/threading.py
--- a/Lib/threading.py	Tue Jun 04 14:50:21 2013 -0700
+++ b/Lib/threading.py	Wed Jun 12 11:32:14 2013 -0700
@@ -92,13 +92,24 @@
 
 class JavaThread(object):
     def __init__(self, thread):
+        self.__ident = None
         self._thread = thread
         _register_thread(thread, self)
 
+    @property
+    def ident(self):
+        return self.__ident
+
+    def _set_ident(self):
+        self.__ident = self._thread.getId()
+
     def __repr__(self):
         _thread = self._thread
         status = ThreadStates[_thread.getState()]
-        if _thread.isDaemon(): status + " daemon"
+        if _thread.isDaemon():
+            status += " daemon"
+        if self.__ident is not None:
+            status += " %s" % self.__ident
         return "<%s(%s, %s)>" % (self.__class__.__name__, self.getName(), status)
 
     def __eq__(self, other):
@@ -176,6 +187,7 @@
 
     def __bootstrap(self):
         try:
+            self._set_ident()
             if _trace_hook:
                 _sys.settrace(_trace_hook)
             if _profile_hook:
@@ -239,6 +251,7 @@
         Thread.__init__(self, name="MainThread")
         import atexit
         atexit.register(self.__exitfunc)
+        self._set_ident()
 
     def _create_thread(self):
         return java.lang.Thread.currentThread()
@@ -264,6 +277,7 @@
     pythread = _jthread_to_pythread[jthread]
     if pythread is None:
         pythread = JavaThread(jthread)
+    pythread._set_ident()
     return pythread
 
 current_thread = currentThread