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

将该目录标记为源目录。通过Ctrl+Shift+Alt+S打开

其他回答

在我的情况下,这是一个maven项目,我重新导入maven(右键单击pom.xml文件并单击重新导入),它立即工作。

如果以上答案都不适合你,只需关闭IntelliJ IDE,并从项目的根目录中删除IntelliJ IDE文件和文件夹:

rm -rf .idea *.iml 

然后用IntelliJ打开项目。它现在必须起作用。

这可能会有帮助:

1)“重建”菜单->“重建项目”。 有时Intellij不重写类,因为它们已经存在,这样你就可以让Intellij重写所有的东西。

2)“运行”菜单->“编辑配置”->删除配置文件->添加配置文件(如果是Java应用程序,则为“应用程序”),从“主类”下拉菜单中选择您的主类。

3)“重建”菜单->“重建项目”。

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.

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。