Question

我使用了以下代码：

g.drawImage(Toolkit.getDefaultToolkit().createImage(new  
URL(".\\mouseicon1.bmp")), MouseX,MouseY,null);

并且图像文件（mouseicon1.bmp）位于同一个包中，但它会抛出此异常：

java.net.MalformedURLException: no protocol: .\mouseicon1.bmp
    at java.net.URL.<init>(Unknown Source)
    at java.net.URL.<init>(Unknown Source)
    at java.net.URL.<init>(Unknown Source)
    at (insertnameofpackagehere).launch$Board.paint(launch.java:48)
    at javax.swing.JComponent.paintToOffscreen(Unknown Source)
    at javax.swing.BufferStrategyPaintManager.paint(Unknown Source)
    at javax.swing.RepaintManager.paint(Unknown Source)
    at javax.swing.JComponent._paintImmediately(Unknown Source)
    at javax.swing.JComponent.paintImmediately(Unknown Source)
    at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
    at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
    at javax.swing.RepaintManager.seqPaintDirtyRegions(Unknown Source)
    at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(Unknown Source)
    at java.awt.event.InvocationEvent.dispatch(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)

Answer 1

正如错误所述，URL需要一个协议。对于本地文件，您可以在使用URL时使用file：//作为协议。或者您可以将文件转换为URL：

new File(path).toURI().toURL();

Answer 2

如果您只是在本地计算机上查找文件，则应该使用以下方法

ToolKit.getDefaultToolkit().createImage(String filename);

但是如果你真的想使用URL，那么我相信这会完成同样的事情

Toolkit.getDefaultToolkit().createImage(new URL("file://./test.bmp"))

malformedURLException没有Image上的协议

2 个答案: