用记事本运行java程序，编译没有错误，但是运行的时候显示“找不到或无法显示主类”。

Answer 1

没有main函数呗，代码贴出来看看

Answer 2

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Answer 3

配置CLASSPATH变量了吧？把CLASSPATH删了就不会了

Answer 4

看看是不是路径问题

Answer 5

环境变量配置有问题