--- old/jdk/src/windows/classes/sun/awt/Win32GraphicsEnvironment.java	2013-09-23 21:56:08.391769700 +0400
+++ new/jdk/src/windows/classes/sun/awt/Win32GraphicsEnvironment.java	2013-09-23 21:56:07.920742700 +0400
@@ -25,6 +25,7 @@
 
 package sun.awt;
 
+import java.awt.AWTError;
 import java.awt.GraphicsConfiguration;
 import java.awt.GraphicsDevice;
 import java.awt.GraphicsEnvironment;
@@ -93,7 +94,9 @@
     protected native int getDefaultScreen();
 
     public GraphicsDevice getDefaultScreenDevice() {
-        return getScreenDevices()[getDefaultScreen()];
+        GraphicsDevice[] screens = getScreenDevices();
+        int index = getDefaultScreen();
+        return screens[0 < index && index < screens.length ? index : 0];
     }
 
     /**
@@ -127,6 +130,9 @@
     public void displayChanged() {
         // getNumScreens() will return the correct current number of screens
         GraphicsDevice newDevices[] = new GraphicsDevice[getNumScreens()];
+        if (newDevices.length == 0) {
+            throw new AWTError("no screen devices");
+        }
         GraphicsDevice oldScreens[] = screens;
         // go through the list of current devices and determine if they
         // could be reused, or will have to be replaced