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

*** 376,386 ****
              if (this.undecorated) styleBits = SET(styleBits, DECORATED, false);
          }
  
          // Either java.awt.Frame or java.awt.Dialog can be resizable, however java.awt.Window is never resizable
          {
!             final boolean resizable = isTargetResizable() && isNativelyFocusableWindow();
              styleBits = SET(styleBits, RESIZABLE, resizable);
              if (!resizable) {
                  styleBits = SET(styleBits, ZOOMABLE, false);
              }
          }
--- 376,386 ----
              if (this.undecorated) styleBits = SET(styleBits, DECORATED, false);
          }
  
          // Either java.awt.Frame or java.awt.Dialog can be resizable, however java.awt.Window is never resizable
          {
!             final boolean resizable = isFrame ? ((Frame)target).isResizable() : (isDialog ? ((Dialog)target).isResizable() : false);
              styleBits = SET(styleBits, RESIZABLE, resizable);
              if (!resizable) {
                  styleBits = SET(styleBits, ZOOMABLE, false);
              }
          }
*** 480,499 ****
          peer.setTextured(IS(TEXTURED, styleBits));
  
          return styleBits;
      }
  
-     private boolean isTargetResizable() {
-         if (target instanceof Frame) {
-             return ((Frame)target).isResizable();
-         } else if (target instanceof Dialog) {
-             return ((Dialog)target).isResizable();
-         }
- 
-         return false;
-     }
- 
      // this is the counter-point to -[CWindow _nativeSetStyleBit:]
      private void setStyleBits(final int mask, final boolean value) {
          execute(ptr -> nativeSetNSWindowStyleBits(ptr, mask, value ? mask : 0));
      }
  
--- 480,489 ----
*** 684,696 ****
          this.visible = visible;
  
          // Manage the extended state when showing
          if (visible) {
              /* Frame or Dialog should be set property WINDOW_FULLSCREENABLE to true if the
!             Frame or Dialog is resizable and focusable.
              **/
!             final boolean resizable = isTargetResizable() && isNativelyFocusableWindow();
              if (resizable) {
                  setCanFullscreen(true);
              }
  
              // Apply the extended state as expected in shared code
--- 674,687 ----
          this.visible = visible;
  
          // Manage the extended state when showing
          if (visible) {
              /* Frame or Dialog should be set property WINDOW_FULLSCREENABLE to true if the
!             Frame or Dialog is resizable.
              **/
!             final boolean resizable = (target instanceof Frame) ? ((Frame)target).isResizable() :
!             ((target instanceof Dialog) ? ((Dialog)target).isResizable() : false);
              if (resizable) {
                  setCanFullscreen(true);
              }
  
              // Apply the extended state as expected in shared code
*** 821,834 ****
          }
      }
  
      @Override
      public void setResizable(final boolean resizable) {
!         final boolean windowResizable = resizable && isNativelyFocusableWindow();
!         setCanFullscreen(windowResizable);
!         setStyleBits(RESIZABLE, windowResizable);
!         setStyleBits(ZOOMABLE, windowResizable);
      }
  
      @Override
      public void setSizeConstraints(int minW, int minH, int maxW, int maxH) {
          execute(ptr -> nativeSetNSWindowMinMax(ptr, minW, minH, maxW, maxH));
--- 812,824 ----
          }
      }
  
      @Override
      public void setResizable(final boolean resizable) {
!         setCanFullscreen(resizable);
!         setStyleBits(RESIZABLE, resizable);
!         setStyleBits(ZOOMABLE, resizable);
      }
  
      @Override
      public void setSizeConstraints(int minW, int minH, int maxW, int maxH) {
          execute(ptr -> nativeSetNSWindowMinMax(ptr, minW, minH, maxW, maxH));
*** 866,877 ****
          return ref.get();
      }
  
      @Override
      public void updateFocusableWindowState() {
!         setStyleBits(SHOULD_BECOME_KEY | SHOULD_BECOME_MAIN | RESIZABLE,
!                 (isNativelyFocusableWindow() && isTargetResizable()));
      }
  
      @Override
      public void setAlwaysOnTop(boolean isAlwaysOnTop) {
          setStyleBits(ALWAYS_ON_TOP, isAlwaysOnTop);
--- 856,867 ----
          return ref.get();
      }
  
      @Override
      public void updateFocusableWindowState() {
!         final boolean isFocusable = isNativelyFocusableWindow();
!         setStyleBits(SHOULD_BECOME_KEY | SHOULD_BECOME_MAIN, isFocusable); // set both bits at once
      }
  
      @Override
      public void setAlwaysOnTop(boolean isAlwaysOnTop) {
          setStyleBits(ALWAYS_ON_TOP, isAlwaysOnTop);