javax.swing.plaf.synth.SynthContext.getPainter 处的 NullPointerException [英] NullPointerException at javax.swing.plaf.synth.SynthContext.getPainter

问题描述

我正在处理的 Java Swing 程序不断收到以下异常.它发生在随机时间并且远不能重现.除了不触发按时操作事件之外，它似乎通常不会导致任何问题，但通常即使在此异常之后，事情也能正常工作.它的发生似乎没有一致性.有人有什么建议吗?我应该提到我们正在使用灵气 LAF.

A Java Swing program I work on keeps getting the exception below. It happens at random times and is far from reproducible. It does not seem to usually cause any problem other than on time action events are not triggered but usually even after this exception things work fine. There seems to be no consistency to its happening. Any one have any advice? I should mention that we are using the nimbus LAF.

java.lang.NullPointerException
at javax.swing.plaf.synth.SynthContext.getPainter(SynthContext.java:181)
at javax.swing.plaf.synth.SynthPanelUI.update(SynthPanelUI.java:95)
at javax.swing.JComponent.paintComponent(JComponent.java:752)
at javax.swing.JComponent.paint(JComponent.java:1029)
at javax.swing.JComponent.paintChildren(JComponent.java:862)
at javax.swing.JComponent.paint(JComponent.java:1038)
at javax.swing.JComponent.paintChildren(JComponent.java:862)
at javax.swing.JComponent.paint(JComponent.java:1038)
at javax.swing.JComponent.paintChildren(JComponent.java:862)
at javax.swing.JComponent.paint(JComponent.java:1038)
at javax.swing.JComponent.paintChildren(JComponent.java:862)
at javax.swing.JComponent.paint(JComponent.java:1038)
at org.jdesktop.jxlayer.JXLayer.paint(Unknown Source)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5124)
at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:278)
at javax.swing.RepaintManager.paint(RepaintManager.java:1224)
at javax.swing.JComponent._paintImmediately(JComponent.java:5072)
at javax.swing.JComponent.paintImmediately(JComponent.java:4882)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:785)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:713)
at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:693)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:125)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

推荐答案

我在调用时有时会遇到同样的错误:

I get the same error sometimes when invoking:

 JComponent.updateUI() 

使用 Nimbus Look &感觉.就我而言，这种调用不是必需的，因此我删除了该行.

using Nimbus Look & Feel. In my case, such invocation was not necessary so I removed the line.

这篇关于javax.swing.plaf.synth.SynthContext.getPainter 处的 NullPointerException的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！