src/share/classes/javax/swing/JInternalFrame.java

*** 347,357 ****
          isIcon = false;
          setVisible(false);
          setRootPaneCheckingEnabled(true);
          desktopIcon = new JDesktopIcon(this);
          updateUI();
!         sun.awt.SunToolkit.checkAndSetPolicy(this, true);
          addPropertyChangeListenerIfNecessary();
      }
  
      /**
       * Called by the constructor to set up the <code>JRootPane</code>.
--- 347,357 ----
          isIcon = false;
          setVisible(false);
          setRootPaneCheckingEnabled(true);
          desktopIcon = new JDesktopIcon(this);
          updateUI();
!         sun.awt.SunToolkit.checkAndSetPolicy(this);
          addPropertyChangeListenerIfNecessary();
      }
  
      /**
       * Called by the constructor to set up the <code>JRootPane</code>.