我试图执行以下代码,但不断收到此错误：

Error: Main method not found in class ScannerDemo, please define the main method as:

public static void main(String[] args)

import java.util.Scanner;

class ScannerDemo

public class Main {

public static void main (String [] args)

{

Scanner sc = new Scanner(System.in);

String userName;

System.out.println("Enter a number");

username = sc.nextLine();

System.out.println("your number is" + username + "enter your next number");

username2 = sc.nextline();

System.out.println("your total is" + username2 );

}

}

我想我必须将Scanner类导入错误,我尝试了不同的方法,但对我来说没有任何效果.

最佳答案 您在顶部连续有两个类声明！这是错的.你的进口很好.尝试：

import java.util.Scanner;

public class ScannerDemo {

public static void main(String[] args) {

...

}

}