java - 我不明白为什么会收到错误消息：错误：无法找到或加载主类 World 原因：java.lang.ClassNotFoundException: World

Question

import java.util.Scanner;
public class World {

    public static void main(String[] args) {
        Scanner scnr = new Scanner(System.in);
        System.out.println("Hello. What is your name? ");
        String input = scnr.next();
        System.out.println("It's nice to meet you, " + input + ". How old are you?");
        String age = scnr.next();
        System.out.println("I see that you are still quite young at only " + age + ".");
        System.out.println("Where do you live? ");
        String city = scnr.next();
        System.out.println("Wow! I've always wanted to go to " + city + ". Thanks for chatting with me. Bye!");
    }


}

我正在使用 IntelliJ，尽管我收到错误消息：错误：无法找到或加载主类 World 原因：java.lang.ClassNotFoundException：World

Answer 1

检查您的课程是否在一个包中。如果没有包，您的代码将无法运行。否则，如果您有其他包含主要方法的类，它将无法工作，因为您不能拥有超过 1 个主要方法