使用 javac 编译 Java 程序成功，但运行时出现 NoClassDefFoundError [英] Compiling Java program with javac succeeds, but NoClassDefFoundError on run

问题描述

class HelloWorld
{ 
    public static void main(String[] args) 
    { 
        System.out.println("hey");
    } 
}

命令提示符会话:

C:UserszobdosDesktop>javac HelloWorld.java

C:UserszobdosDesktop>dir *.class
 Volume in drive C is OS
 Volume Serial Number is A45E-7B01

 Directory of C:UserszobdosDesktop

11/20/2010  10:16 AM               417 HelloWorld.class
               1 File(s)            417 bytes
               0 Dir(s)   8,145,432,576 bytes free

C:UserszobdosDesktop>java HelloWorld
Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorld
Caused by: java.lang.ClassNotFoundException: HelloWorld
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Could not find the main class: HelloWorld.  Program will exit.

C:UserstolbertDesktop>

推荐答案

没关系，使用后就可以了:

Nevermind, it works after using:

java -classpath . HelloWorld

这篇关于使用 javac 编译 Java 程序成功，但运行时出现 NoClassDefFoundError的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！