程式語言 - Java - J2ME - 解決java.lang.NoClassDefFoundError問題


問題如下： 

arguments [[main.jar]]
	  org.microemu.app.Main.main(Main.java:1031)
openJar [file:///home/user/j2me/main.jar]
	  org.microemu.app.Common.loadJar(Common.java:554)
Loading MIDlet class main of version 68
	  org.microemu.app.classloader.ChangeCallsClassVisitor.visit(ChangeCallsClassVisitor.java:68)
openJar [file:///home/user/j2me/main.jar]
	  org.microemu.app.Common.loadJar(Common.java:554)
Loading MIDlet class main of version 68
	  org.microemu.app.classloader.ChangeCallsClassVisitor.visit(ChangeCallsClassVisitor.java:68)
error Message: Error starting MIDlet: Unable to create MIDlet, java.lang.NoClassDefFoundError: main$1 java.lang.NoClassDefFoundError: main$1
	  org.microemu.app.Common.startMidlet(Common.java:419)
java.lang.NoClassDefFoundError: main$1
	at java.base/java.lang.Class.getDeclaredConstructors0(Native Method)
	at java.base/java.lang.Class.privateGetDeclaredConstructors(Class.java:3006)
	at java.base/java.lang.Class.getConstructor0(Class.java:3211)
	at java.base/java.lang.Class.newInstance(Class.java:698)
	at org.microemu.app.Common.startMidlet(Common.java:412)
	at org.microemu.app.Common.initMIDlet(Common.java:1039)
	at org.microemu.app.launcher.Launcher.commandAction(Launcher.java:121)
	at javax.microedition.lcdui.List.keyPressed(List.java:189)
	at javax.microedition.lcdui.Display$KeyEvent.run(Display.java:152)
	at org.microemu.device.ui.EventDispatcher.post(EventDispatcher.java:162)
	at org.microemu.device.ui.EventDispatcher.run(EventDispatcher.java:97)
	at java.base/java.lang.Thread.run(Thread.java:1447)
destroyMIDletContext
	  org.microemu.app.Common.destroyMIDletContext(Common.java:189)

解法如下： 

一個Java檔案只能包含一個Class