标签：java awt Toolkit desktop swing JAVA RepaintManager javax 图片

Image image = Toolkit.getDefaultToolkit().getImage(Panel.class.getResource("/20220204.png"));
        g.drawImage(image,10,10,512,512,this);

所有的方法都试过了，不管是绝对路径还是该项目根目录

都是抛出一大堆异常（如下）

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException: Cannot invoke "java.net.URL.toString()" because "url" is null
	at java.desktop/sun.awt.SunToolkit.getImageFromHash(SunToolkit.java:699)
	at java.desktop/sun.awt.SunToolkit.getImage(SunToolkit.java:735)
	at draw.MyPanel.paint(DrawCirle.java:66)
	at java.desktop/javax.swing.JComponent.paintChildren(JComponent.java:952)
	at java.desktop/javax.swing.JComponent.paint(JComponent.java:1128)
	at java.desktop/javax.swing.JComponent.paintChildren(JComponent.java:952)
	at java.desktop/javax.swing.JComponent.paint(JComponent.java:1128)
	at java.desktop/javax.swing.JLayeredPane.paint(JLayeredPane.java:586)
	at java.desktop/javax.swing.JComponent.paintChildren(JComponent.java:952)
	at java.desktop/javax.swing.JComponent.paintToOffscreen(JComponent.java:5318)
	at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBufferedImpl(RepaintManager.java:1657)
	at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1632)
	at java.desktop/javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1570)
	at java.desktop/javax.swing.RepaintManager.paint(RepaintManager.java:1337)
	at java.desktop/javax.swing.JComponent.paint(JComponent.java:1105)
	at java.desktop/java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:39)
	at java.desktop/sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:75)
	at java.desktop/sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:112)
	at java.desktop/java.awt.Container.paint(Container.java:2005)
	at java.desktop/java.awt.Window.paint(Window.java:3959)
	at java.desktop/javax.swing.RepaintManager$4.run(RepaintManager.java:890)
	at java.desktop/javax.swing.RepaintManager$4.run(RepaintManager.java:862)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:862)
	at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:835)
	at java.desktop/javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:784)
	at java.desktop/javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1898)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:771)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:722)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:716)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:741)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

这到底是怎么个事儿.............

标签：java,awt,Toolkit,desktop,swing,JAVA,RepaintManager,javax,图片
来源： https://blog.csdn.net/qq_52341302/article/details/122785994

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