题目描述

算法1

(Scanner)

import java.util.Scanner;
public class Main{
    public static void main(String[]args){
       Scanner scan=new Scanner(System.in);
       int a=scan.nextInt();
       int b=scan.nextInt();
       System.out.println(a+b);
    }

}

算法2

(BufferedReader)

import java.io.*;
public class Main{
    public static void main(String[]args)throws IOException{
        BufferedReader cin=new BufferedReader(new InputStreamReader(System.in));
        String[]str=cin.readLine().split(" ");
        int[]arr=new int[2];
        for(int i=0;i<arr.length;i++){
            arr[i]=Integer.parseInt(str[i]);
        }
        System.out.println(arr[0]+arr[1]);
    }

}

结论：

在做题的时候用BufferedReader更好！