我是Java初学者,正在尝试使用IntelliJ运行我的代码,我刚刚将它安装为JDK 1.7的IDE。下面这段代码甚至不能编译,并不断给我错误:

Error: Could not find or load main class libTest

Code

import java.lang.Integer;
import java.lang.String;
import java.lang.System;
import java.util.*;

class book {

    private String name = "trial";
    private int bookCode=1;
    private int issued=0;

     public void Issue(){
         if(issued==0) {
             issued=1;
             System.out.println("You have succesfully issued the book");
         }
         else {
             System.out.println("The book is already issued. Please contact the librarian for further details");
         }
    }

    public int checkCode() {
        return bookCode;
    }

    String readName() {
        return name;
    }

    public void setName(String newName){
        name=newName;
    }

    public void setBookCode(int newCode){
        bookCode=newCode;
    }
}

class library {
    private ArrayList books=new ArrayList();

    public void getList(){
        for(int bk:books){
            String bName=books(bk).readName();
            System.out.println((bk+1)+")  "+bName);
        }
    }
}

public class libTest{
    public static void main(String[] args){
        library newLib= new library();
        System.out.println("code working");
   }
}

有任何改变,我必须在编译器设置??或者是代码。


当前回答

I am working with Kotlin but am guessing the problem is the same. I would start a project, create a single file and add main to it and the IDE couldn't find the main. I tried the things in this list and none worked. I finally mentioned my frustration on one of the IntelliJ pages and was contacted. Of course, it worked fine for IntelliJ. After a couple of days back and forth, I noticed that the highlight function wasn't working and mentioned that. It turned out something was wrong with the IDE settings. I still don't know specifically what was wrong but the fix in my case was to reset the IDE settings. File->Manage IDE Settings->Restore Default settings. After this, the green triangle start icon became visible to the left of my main function and things continued to work normally for subsequent projects. Thanks to Konstantin at JetBrain's support for his patience.

其他回答

当我的Java类在src/main/kotlin目录下时,我遇到了这个问题。当我把它移到src/main/java后,问题就不存在了。

对我来说,我尝试了上面的几个选项,没有工作。然后我只是重命名了我的Application类,这可能迫使intelliJ构建一个新的jar和错误消息开始改变。然后我重新命名它,它工作。

我必须将“src”文件夹标记为“Sources”。在重新启动IntelliJ并重新构建项目后,我可以运行项目而没有进一步的问题(见截图)。 编辑:您可以通过File->项目结构或按Ctrl+Shift+Alt+S访问“项目结构”选项卡。

你可以在项目目录下的pom.xml文件上运行maven命令:

MVN清洁安装

对我来说,删除项目目录中的。idea文件工作正常!关闭ide, 删除项目中的.idea,打开项目构建并加载!