各位义父，为啥我这个Java代码解题会显示编译失败，我自己的idea上可以正常使用啊

import java.util.Scanner;

public class unhappy {
    public static void main (String []args){
        Scanner scanner = new Scanner(System.in);
        int now=0,max=0,sum;
        for(int i = 1;i<8;i++){
            int a = scanner.nextInt();
            int b = scanner.nextInt();
            sum = a + b;
            if((sum>8)&&(sum>max)){
                now=i;
                max=sum;
            }

        }
        System.out.println(now);
    }
}