0

这是我偶尔遇到的错误，但它会停止 UI 的工作

有谁知道如何解决它？

当我们重新绘制或更新 UI 时，通常会发生此错误挂起 UI。

     Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
            at javax.swing.plaf.synth.SynthLookAndFeel.paintRegion(Unknown Source)
            at javax.swing.plaf.synth.SynthLookAndFeel.update(Unknown Source)
            at javax.swing.plaf.synth.SynthPanelUI.update(Unknown Source)
            at javax.swing.JComponent.paintComponent(Unknown Source)
            at javax.swing.JComponent.paint(Unknown Source)
            at javax.swing.JComponent.paintChildren(Unknown Source)
            at javax.swing.JComponent.paint(Unknown Source)
            at javax.swing.JComponent.paintChildren(Unknown Source)
            at javax.swing.JComponent.paint(Unknown Source)
            at javax.swing.JComponent.paintChildren(Unknown Source)
            at javax.swing.JComponent.paint(Unknown Source)
            at javax.swing.JLayeredPane.paint(Unknown Source)
            at javax.swing.JComponent.paintChildren(Unknown Source)
            at javax.swing.JComponent.paintToOffscreen(Unknown Source)
            at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
            at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
            at javax.swing.RepaintManager.paint(Unknown Source)
            at javax.swing.JComponent.paint(Unknown Source)
            at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
            at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
            at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
            at java.awt.Container.paint(Unknown Source)
            at java.awt.Window.paint(Unknown Source)
            at javax.swing.RepaintManager$3.run(Unknown Source)
            at javax.swing.RepaintManager$3.run(Unknown Source)
            at java.security.AccessController.doPrivileged(Native Method)
            at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
            at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
            at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
            at 

javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
        at javax.swing.RepaintManager.access$1000(Unknown Source)
        at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
        at java.awt.event.InvocationEvent.dispatch(Unknown Source)
        at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
        at java.awt.EventQueue.access$200(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.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)
4

0 回答 0