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      1. “无法找到或加载主类"使用 cmd 提示符运行 java 程序时出错

        时间:2023-07-14
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                • 本文介绍了“无法找到或加载主类"使用 cmd 提示符运行 java 程序时出错的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我正在运行一个简单的HelloWorld"程序.我在命令提示符中收到此错误:

                  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.

                  我已经在系统中设置了 CLASSPATHPATH 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相同,并且在同一目录中创建了 .class 文件.还有什么问题?

                  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?

                  我的示例程序如下所示:

                  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

                  当 Main 类在包中时,您需要按如下方式运行它:

                  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,您应该按如下方式运行程序:

                  In your case you should run the program as follows :

                  java org.tij.exercises.HelloWorld 
                  

                  这篇关于“无法找到或加载主类"使用 cmd 提示符运行 java 程序时出错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跟版网!

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