【发布时间】：2010-12-18 04:41:31
【问题描述】：
我正在使用 BorderFactory 创建一个带有主题 UI 主题 Swing 用户界面的标题边框，我遇到了下面显示的异常。我尝试使用LineBorder，它运行良好，但似乎 Substance UI 以某种方式干扰了TitledBorder。边框绘制在paintComponent通过：
if (getBorder() != null) {
getBorder().paintBorder(this, g, 0, 0, getWidth(), getHeight());
}
这本身可能是不正确的。我的问题本质上是如何让TitledBorder 工作而不创建父JPanel 并将其设置在其上，这似乎有点逃避。
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at org.pushingpixels.lafwidget.utils.RenderingUtils.desktopHints(RenderingUtils.java:113)
at org.pushingpixels.lafwidget.utils.RenderingUtils.installDesktopHints(RenderingUtils.java:85)
at org.pushingpixels.substance.internal.utils.border.SubstanceEtchedBorder.paintBorder(SubstanceEtchedBorder.java:132)
at javax.swing.border.TitledBorder.paintBorder(TitledBorder.java:330)
at javax.swing.JComponent.paintBorder(JComponent.java:947)
at javax.swing.JComponent.paint(JComponent.java:1055)
at javax.swing.JComponent.paintChildren(JComponent.java:887)
at javax.swing.JComponent.paint(JComponent.java:1063)
at javax.swing.JComponent.paintChildren(JComponent.java:887)
at javax.swing.JComponent.paint(JComponent.java:1063)
at javax.swing.JComponent.paintChildren(JComponent.java:887)
at javax.swing.JComponent.paint(JComponent.java:1063)
at javax.swing.JComponent.paintChildren(JComponent.java:887)
at javax.swing.JComponent.paint(JComponent.java:1063)
at javax.swing.JLayeredPane.paint(JLayeredPane.java:585)
at javax.swing.JComponent.paintChildren(JComponent.java:887)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5213)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1493)
at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1424)
at javax.swing.RepaintManager.paint(RepaintManager.java:1217)
at javax.swing.JComponent.paint(JComponent.java:1040)
at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:39)
at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:78)
at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:115)
at java.awt.Container.paint(Container.java:1951)
at java.awt.Window.paint(Window.java:3814)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:792)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:739)
at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:688)
at javax.swing.RepaintManager.access$700(RepaintManager.java:59)
at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1632)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:660)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
提前感谢您的帮助。
【问题讨论】：
-
您要向哪个组件添加边框？所有组件都会发生这种情况吗？你说
JPanels 不会发生这种情况... -
您可能会更幸运地直接向 Substance 团队报告此问题，以便他们进行调查，或者至少提出解决方法。我假设如果您使用默认的 LaF，问题就会消失。
-
你解决了吗？你在这方面有什么进展吗？也许您还可以为该问题提供 SSCCE 吗？我想和它一起玩。
-
我通过将组件包装在一个面板中来整理它，然后为该面板提供一个边框:)
标签： java swing border jcomponent substance