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

*** 264,274 ****
              if (supportsWindowDecorations) {
                  setUndecorated(true);
                  getRootPane().setWindowDecorationStyle(JRootPane.FRAME);
              }
          }
!         sun.awt.SunToolkit.checkAndSetPolicy(this, true);
      }
  
      /**
       * Called by the constructor methods to create the default
       * <code>rootPane</code>.
--- 264,274 ----
              if (supportsWindowDecorations) {
                  setUndecorated(true);
                  getRootPane().setWindowDecorationStyle(JRootPane.FRAME);
              }
          }
!         sun.awt.SunToolkit.checkAndSetPolicy(this);
      }
  
      /**
       * Called by the constructor methods to create the default
       * <code>rootPane</code>.