jdk/src/windows/classes/sun/awt/Win32GraphicsEnvironment.java

*** 23,32 ****
--- 23,33 ----
   * questions.
   */
  
  package sun.awt;
  
+ import java.awt.AWTError;
  import java.awt.GraphicsConfiguration;
  import java.awt.GraphicsDevice;
  import java.awt.GraphicsEnvironment;
  import java.awt.Toolkit;
  import java.awt.peer.ComponentPeer;
*** 91,101 ****
  
      protected native int getNumScreens();
      protected native int getDefaultScreen();
  
      public GraphicsDevice getDefaultScreenDevice() {
!         return getScreenDevices()[getDefaultScreen()];
      }
  
      /**
       * Returns the number of pixels per logical inch along the screen width.
       * In a system with multiple display monitors, this value is the same for
--- 92,104 ----
  
      protected native int getNumScreens();
      protected native int getDefaultScreen();
  
      public GraphicsDevice getDefaultScreenDevice() {
!         GraphicsDevice[] screens = getScreenDevices();
!         int index = getDefaultScreen();
!         return screens[0 < index && index < screens.length ? index : 0];
      }
  
      /**
       * Returns the number of pixels per logical inch along the screen width.
       * In a system with multiple display monitors, this value is the same for
*** 125,134 ****
--- 128,140 ----
       */
      @Override
      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
          if (oldScreens != null) {
              for (int i = 0; i < oldScreens.length; i++) {