src/java.desktop/macosx/classes/sun/lwawt/LWWindowPeer.java

*** 541,553 ****
      @Override
      public int getState() {
          return windowState;
      }
  
      @Override
      public void setMaximizedBounds(Rectangle bounds) {
!         // TODO: not implemented
      }
  
      @Override
      public void setBoundsPrivate(int x, int y, int width, int height) {
          setBounds(x, y, width, height, SET_BOUNDS | NO_EMBEDDED_CHECK);
--- 541,575 ----
      @Override
      public int getState() {
          return windowState;
      }
  
+     public Rectangle getMaximizedBounds() {
+         Object target = getTarget();
+         return (target instanceof Frame)
+                 ? ((Frame) target).getMaximizedBounds() : null;
+     }
+ 
+     public Rectangle getDefaultMaximizedBounds() {
+         GraphicsConfiguration config = getGraphicsConfiguration();
+         Insets insets = ((CGraphicsDevice) config.getDevice()).getScreenInsets();
+         Rectangle toBounds = config.getBounds();
+         return new Rectangle(
+                 toBounds.x + insets.left,
+                 toBounds.y + insets.top,
+                 toBounds.width - insets.left - insets.right,
+                 toBounds.height - insets.top - insets.bottom);
+     }
+ 
      @Override
      public void setMaximizedBounds(Rectangle bounds) {
! 
!         bounds = (bounds == null)
!                 ? getDefaultMaximizedBounds()
!                 : constrainBounds(bounds);
!         platformWindow.setMaximizedBounds(
!                 bounds.x, bounds.y, bounds.width, bounds.height);
      }
  
      @Override
      public void setBoundsPrivate(int x, int y, int width, int height) {
          setBounds(x, y, width, height, SET_BOUNDS | NO_EMBEDDED_CHECK);
*** 1056,1065 ****
--- 1078,1093 ----
      @Override
      public final void displayChanged() {
          if (updateGraphicsDevice()) {
              updateMinimumSize();
          }
+ 
+         Rectangle maximizedBounds = getMaximizedBounds();
+         if (maximizedBounds == null) {
+             setMaximizedBounds(getDefaultMaximizedBounds());
+         }
+ 
          // Replace surface unconditionally, because internal state of the
          // GraphicsDevice could be changed.
          replaceSurfaceData();
          repaintPeer();
      }