diff -r a9f4cf2f44fd -r 906cb708a629 jdk/test/sanity/client/lib/SwingSet3/src/com/sun/swingset3/demos/button/ButtonDemo.java
--- a/jdk/test/sanity/client/lib/SwingSet3/src/com/sun/swingset3/demos/button/ButtonDemo.java	Tue Apr 19 09:21:45 2016 -0700
+++ b/jdk/test/sanity/client/lib/SwingSet3/src/com/sun/swingset3/demos/button/ButtonDemo.java	Tue Apr 19 11:42:29 2016 -0700
@@ -215,7 +215,6 @@
 
         javax.swing.SwingUtilities.invokeLater(() -> {
             JFrame frame = new JFrame(DEMO_TITLE);
-            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
             frame.add(buttonDemo);
             frame.pack();
             frame.setVisible(true);