无法CMD命令行方式运行java类 NoClassDefFoundError

本文介绍如何解决使用CMD编译并运行Java类时出现的NoClassDefFoundError问题,通常该问题是由于包和路径配置不正确引起的。

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如果用CMD方式编译一个java类,然后运行,出现NoClassDefFoundError,一般都是包和路径的问题。

 

1.在相应的目录启动cmd

2.运行java 包名.类名   (java com.test.HelloWorld)

 

路径:

 

错误:

 

正确的做法:

Exception in thread "AWT-EventQueue-0": java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.mlwidgets.help.HelpPrefs at com.mathworks.mlwidgets.help.HelpUtils.isDocInstalled(HelpUtils.java:424) at com.mathworks.mde.functionhints.FunctionHints.openFunctionHints(FunctionHints.java:108) at com.mathworks.mde.cmdwin.CmdWinEditorKit.maybeOpenFunctionHints(CmdWinEditorKit.java:1706) at com.mathworks.mde.cmdwin.CmdWinEditorKit.access$1000(CmdWinEditorKit.java:88) at com.mathworks.mde.cmdwin.CmdWinEditorKit$CWDefaultKeyTypedAction.actionPerformed(CmdWinEditorKit.java:2198) at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1668) at javax.swing.JComponent.processKeyBinding(JComponent.java:2882) at javax.swing.JComponent.processKeyBindings(JComponent.java:2929) at javax.swing.JComponent.processKeyEvent(JComponent.java:2845) at com.mathworks.mde.cmdwin.XCmdWndView.processKeyEvent(XCmdWndView.java:2461) at java.awt.Component.processEvent(Component.java:6316) at java.awt.Container.processEvent(Container.java:2239) at com.mathworks.mde.cmdwin.XCmdWndView.processEvent(XCmdWndView.java:439) at java.awt.Component.dispatchEventImpl(Component.java:4889) at java.awt.Container.dispatchEventImpl(Container.java:2297) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954) at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:835) at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1103) at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:974) at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:800) at java.awt.Component.dispatchEventImpl(Component.java:4760) at java.awt.Container.dispatchEventImpl(Container.java:2297) 在matlab命令行窗口总是显示这一串警告是怎么回事,应该如何解决
03-28
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