In Swingset2 JInternalFrame demo, focusing on any internalframes and pressing Ctrl+F7 and then any of up/down/left/arrow key to move the internal frames results in NPE in NimbusL&F. It is because `JComponent.processKeyBinding() `calls `SwingUtilities.notifyAction` which calls `BasicDesktopPaneUI.actionPerformed` where it gets `Desktop.minOnScreenInsets` property to get the Insets and then uses insets.top/bottom/left/right value to move the internalframe but this property is not defined for Nimbus so deferencing Insets object results in NPE.
Fix is added to create a 0 insets incase some L&F do not define` Desktop.minOnScreenInsets` property. No regression test is added as it can be easily checked by SwingSet2 JInternalFrame demo. ------------- Commit messages: - 6603771: Nimbus L&F: Ctrl+F7 keybinding for Jinternal Frame throws a NPE. Changes: https://git.openjdk.org/jdk/pull/11605/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11605&range=00 Issue: https://bugs.openjdk.org/browse/JDK-6603771 Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/11605.diff Fetch: git fetch https://git.openjdk.org/jdk pull/11605/head:pull/11605 PR: https://git.openjdk.org/jdk/pull/11605
