我已经设法编译java程序，但我不能执行它 [英] I have managed to compile java-program but I cannot execute it

问题描述

我刚刚在Windows Vista上安装了JDK。之后，我为4个环境变量设置了合适的值：classpath，include，lib，path。之后，我能够编译我的HelloWorld程序（我有一个* .class文件）。但是当我尝试执行编译的程序（我键入java HelloWorldApp）它不工作。 Java写了很多东西，最后它写的是找不到主类：HelloWorldApp。任何人，请求，帮助我这个问题吗？

I have just installed JDK on Windows Vista. After that I set proper values for the 4 environment variables: classpath, include, lib, path. After that I was able to compile my HelloWorld-program (I got a *.class file). But when I try to execute the compiled program (I type java HelloWorldApp) it does not work. The Java write a lot of stuff and in the end it is written that it "could not find the main class: HelloWorldApp". Can anybody, pleas, help me with this problem?

推荐答案

1. 创建一个名为的文件HelloWorld.java ;


2. 将 HelloWorld.java ：


3. 通过执行命令： javac HelloWorld.java 在与HelloWorld.java相同的文件夹中;


4. 执行代码： java -cp。 HelloWorld 在与HelloWorld.java相同的文件夹中。

1. create a file called HelloWorld.java;
2. paste the code posted below inside HelloWorld.java:
3. compile it by executing the command: javac HelloWorld.java in the same folder as HelloWorld.java is in;
4. execute the code by doing: java -cp . HelloWorld in the same folder as HelloWorld.java is in.

---

---

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

classpath的工作原理， a href =http://en.wikipedia.org/wiki/Classpath_%28Java%29 =nofollow noreferrer> http://en.wikipedia.org/wiki/Classpath_%28Java%29

How the classpath works, can be read here: http://en.wikipedia.org/wiki/Classpath_%28Java%29

这篇关于我已经设法编译java程序，但我不能执行它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！