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问题描述
我正在使用Netbeans IDE 7.0.1我设置JFrame的gridbaglayout它是通过exeption
以下
当我没有使用任何布局它工作正常... 。
线程中的异常 AWT-EventQueue-0 java.lang.NullPointerException
at java.awt.GridBagConstraints.clone(GridBagConstraints.java: 652 )
at java.awt.GridBagLayout.setConstraints(GridBagLayout.java: 499 )
at java.awt .GridBagLayout.addLayoutComponent(GridBagLayout.java: 700 )
at java.awt.Container.addImpl(Container.java: 1120 )
at java.awt.Container.add(Container.java: 966 )
at Main_Menu.initComponents( Main_Menu.java: 143 )Main_Menu
。< init>(Main_Menu.java: 24 )
在Main_Menu $ 5.run(Main_Menu.java: 206 )
at java.awt.event.InvocationEvent.dispatch( InvocationEvent.java: 251 )
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java: 733 )
at java.awt.EventQueue.access $ 200(EventQueue.java: 103 )
at java.awt.EventQueue $ 3.run (EventQueue.java: 694 )
at java.awt.EventQueue $ 3.run(EventQueue.java: 692 )
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain $ 1.doIntersectionPrivilege(ProtectionDomain.java: 76 )
at java.awt.EventQueue.dispatchEvent(EventQueue.java: 703 )
at java.awt.EventDispatchThread.pumpOneEventForFilters (EventDispatchThread.java: 242 )
at java.awt.EventDisp atchThread.pumpEventsForFilter(EventDispatchThread.java: 161 )
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java: 150 )
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java: 146 )
at java.awt.EventDispatchThread .pumpEvents(EventDispatchThread.java: 138 )
at java.awt.EventDispatchThread.run(EventDispatchThread.java: 91 )< / init>
解决方案
i am using Netbeans IDE 7.0.1 i set gridbaglayout of JFrame it is throughing exeption
below
when i did not use any layout it works fine....
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at java.awt.GridBagConstraints.clone(GridBagConstraints.java:652) at java.awt.GridBagLayout.setConstraints(GridBagLayout.java:499) at java.awt.GridBagLayout.addLayoutComponent(GridBagLayout.java:700) at java.awt.Container.addImpl(Container.java:1120) at java.awt.Container.add(Container.java:966) at Main_Menu.initComponents(Main_Menu.java:143) at Main_Menu.<init>(Main_Menu.java:24) at Main_Menu$5.run(Main_Menu.java:206) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733) at java.awt.EventQueue.access$200(EventQueue.java:103) at java.awt.EventQueue$3.run(EventQueue.java:694) at java.awt.EventQueue$3.run(EventQueue.java:692) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:703) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)</init>
解决方案
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