JSlider错误，但不知道它来自哪里

在我的程序中的某个点，正在生成以下错误。任何想法这是什么？JSlider错误，但不知道它来自哪里

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException 
     at javax.swing.plaf.basic.BasicSliderUI.calculateThumbLocation(Unknown Source) 
     at javax.swing.plaf.basic.BasicSliderUI.calculateGeometry(Unknown Source) 
     at javax.swing.plaf.basic.BasicSliderUI$Handler.componentResized(Unknown Source) 
     at java.awt.Component.processComponentEvent(Unknown Source) 
     at java.awt.Component.processEvent(Unknown Source) 
     at java.awt.Container.processEvent(Unknown Source) 
     at java.awt.Component.dispatchEventImpl(Unknown Source) 
     at java.awt.Container.dispatchEventImpl(Unknown Source) 
     at java.awt.Component.dispatchEvent(Unknown Source) 
     at java.awt.EventQueue.dispatchEventImpl(Unknown Source) 
     at java.awt.EventQueue.access$000(Unknown Source) 
     at java.awt.EventQueue$3.run(Unknown Source) 
     at java.awt.EventQueue$3.run(Unknown Source) 
     at java.security.AccessController.doPrivileged(Native Method) 
     at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) 
     at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) 
     at java.awt.EventQueue$4.run(Unknown Source) 
     at java.awt.EventQueue$4.run(Unknown Source) 
     at java.security.AccessController.doPrivileged(Native Method) 
     at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) 
     at java.awt.EventQueue.dispatchEvent(Unknown Source) 
     at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) 
     at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) 
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) 
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source) 
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source) 
     at java.awt.EventDispatchThread.run(Unknown Source)

来源

2011-08-17 CodeGuy

我有一个想法：告诉我们你的代码，以便我们可以知道是什么原因导致这个错误 –

很多人在这里只EXCELENT的Java/C /，汇编程序员，但没有人是mindreader，没有电池 – mKorbel

你需要更长的堆栈跟踪，这些都是java类。您现在需要现在发生在您的哪些课程中。 –

我在初始化时弹出类似的间歇NPE时，将滑块设置为使用扩展BasicSliderUI的自定义UI。我固定他们通过在invokeLater的包装它：

SwingUtilities.invokeLater(new Runnable(){ 
     @Override public void run() { 
      slider.setUI(new CustomSliderUI(slider)); 
     } 
    });

来源

2011-08-18 23:01:48 horfcha

JSlider错误，但不知道它来自哪里

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