“无法找到或加载主类”使用cmd提示符运行Java程序时出错 [英] "Could not find or load main class" Error while running java program using cmd prompt
问题描述
我正在运行一个简单的HelloWorld程序。我在命令提示符下收到此错误:
I am running a simple "HelloWorld" Program. I get this error in the command prompt:
无法找到或加载主类
HelloWorld
。
我已设置 CLASSPATH
和 PATH
变量。在 cmd
提示符下,我从保存 HelloWorld
程序的目录运行。我可以看到类名和文件名是相同的,还在同一目录中创建 .class
文件。还有什么可能是问题?
I have set the CLASSPATH
and PATH
variable in the system. In the cmd
prompt, I am running from the directory where I have saved HelloWorld
program. I can see the class name and the file name are same and also .class
file created in the same directory. What else could be the problem?
我的示例程序看起来像这样:
My sample program looks like this:
package org.tij.exercises;
public class HelloWorld {
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("Hello World!!");
}
}
推荐答案
Main类是在一个包内,然后你需要运行它如下:
When the Main class is inside a package then you need to run it as follows :
java <packageName>.<MainClassName>
在您的情况下,您应该按照以下方式运行程序:
In your case you should run the program as follows :
java org.tij.exercises.HelloWorld
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