错误“ClassNotFoundException”在IntelliJ IDEA中 [英] Error "ClassNotFoundException" in IntelliJ IDEA

问题描述

我做了这个简单的程序：

I made this simple program:

package main.java;

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

并且出现此错误。我不知道发生了什么，

And got this error. I have NO idea what is happening,

"C:\Program Files\Java\jdk1.7.0_21\bin\java" -Didea.launcher.port=7532 "-Didea.launcher.bin.path=C:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 12.1.4\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.7.0_21\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\jce.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\jfxrt.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\resources.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\rt.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.7.0_21\jre\lib\ext\zipfs.jar;C:\Users\Tim\IdeaProjects\Rust\out\production\Rust;C:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 12.1.4\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain java.start
Exception in thread "main" java.lang.ClassNotFoundException: java.start
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:188)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:113)

Process finished with exit code 1

任何人都知道出了什么问题？

Anyone know what is wrong?

推荐答案

可能你的项目结构是 src / main / java /start.java 但是当你将它添加到IntelliJ时，你已将 src 设置为源文件夹，因此IntelliJ将 main.java 作为包。

Probably your project structure was src/main/java/start.java but when you added it to IntelliJ you have set src as a source folder, so IntelliJ put main.java as a package.

在项目设置中（ Ctrl + Shift + Alt + S ）→模块→来源选项卡设置 src / main / java as 源文件夹。然后在您的简单程序更改包中随意使用（例如 my.test ）。之后如果IntelliJ报告与包快速修复符合 Alt + Enter 的任何错误应该有帮助

In Project Setting (Ctrl+Shift+Alt+S) → Modules → Sources tab set src/main/java as Source Folder. Then in your simple program change package to whatever you like (e.g. my.test). After that if IntelliJ reports any error in line with package quick fix with Alt+Enter should help

这篇关于错误“ClassNotFoundException”在IntelliJ IDEA中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！