Microsoft Windows 2000 [Version 5.00.2195] (C) 版权所有 1985-1998
Microsoft Corp. C:\>javac HelloWorld.java C:\>java
HelloWorld Exception in thread "main" java.lang.NoClassDefFoundError:
HelloWorld
C:\> 以上为出错信息,源程序如下:
class HelloWorld { public static void main(String[] args) { //
Display "Hello World!" System.out.println("Hello World!"); } }
译通过 运行怎么就Exception in thread "main"
java.lang.NoClassDefFoundError: HelloWorld???????/
Exception in thread "main" java.lang.NoClassDefFoundError: Hello
(wrong hello/Hello) at java.lang.ClassLoader.defineClass0(Native
Method) at
java.lang.ClassLoader.defineClass(ClassLoader.java:486) at
java.security.SecureClassLoader.defineClass(SecureClassLoader. 1) at
java.net.URLClassLoader.defineClass(URLClassLoader.java:248) at
java.net.URLClassLoader.access0(URLClassLoader.java:56) at
java.net.URLClassLoader.run(URLClassLoader.java:195) at
java.security.AccessController.doPrivileged(Native Method) at
java.net.URLClassLoader.findClass(URLClassLoader.java:188) at
java.lang.ClassLoader.loadClass(ClassLoader.java:297) at
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286) at
java.lang.ClassLoader.loadClass(ClassLoader.java:253) at
java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
这时,我们在编译的时候,应该这样:javac -d .
Hello.java这样会在当前目录下产生一个新的子目录,目录名字就是hello。