标题翻译
Couldn't find or load main class when running java class in command prompt
问题
我在Java中编写了一个简单的程序HelloWorld。但是当我尝试在命令提示符中运行我的Java代码时，
java HelloWorld
它返回
找不到或加载主类
我该怎么办？？
我的代码中没有语法错误！！
英文翻译
I have written a simple program HelloWorld in java. But when I try to run my java code in command prompt using
java HelloWorld
It returns
Couldn't find or load main class
What should I do??
There's no syntax error in my code!!
答案1
得分: -1
在环境变量中将"."添加到CLASSPATH变量解决了我的问题！！
Java在CLASSPATH变量中提到的路径中搜索类，如果你不在那里添加"."，它就不会在当前工作目录中搜索类！！
前往控制面板 > 系统与安全 > 系统 > 高级系统设置 > 高级
点击环境变量
如果在用户变量下存在CLASSPATH变量，请添加"."并以分号分隔。例如，如果Java安装在C:\Program Files\Java\jdk1.8.0_25\bin中，CLASSPATH将是
C:\Program Files\Java\jdk1.8.0_25\bin;.;
点击确定。
英文翻译
Adding . to CLASSPATH variable in Environment variables solved my problem!!
Java searches for the classes in the paths mentioned in CLASSPATH variable, if you don't add . there, it won't search for classes in current working directory!!!
Go to Control panel > System and Security > System > Advanced System Settings > Advanced
Click Environment Variables
If CLASSPATH variable is present under User variables , add '.' separated by semicolon. For example if java is installed in C:\Program Files\Java\jdk1.8.0_25\bin , CLASSPATH will be
C:\Program Files\Java\jdk1.8.0_25\bin;.;
Click OK.
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