C:\Java\jdk1.6.0_04\bin>java HelloJavaApp
Exception in thread "main" java.lang.NoClassDefFoundError: HelloJavaApp
Caused by: java.lang.ClassNotFoundException: HelloJavaApp
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
Exception in thread "main" java.lang.NoClassDefFoundError: HelloJavaApp
Caused by: java.lang.ClassNotFoundException: HelloJavaApp
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
当前执行的类被编译时,所搜索的类定义存在,但无法再找到该定义。这说明程序代码是没问题的,lz把原来的class删除,重新编译下就好了。
看看你的代码,main函数有没写对。
没有定义的Class,程序中写错东西了,好好检查一下~