题解 | #修改Data类的定义#

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNextInt()) {
            int x = scanner.nextInt();//输入x
            int y = scanner.nextInt();//输入y
            Data data = new Data(x, y);//引入方法中的函数
            System.out.println(data.getX() + data.getY());//输出x+y
        }
    }

}

class Data {

    private int x;
    private int y;

    public Data(int x, int y) {//一开始是private，所以方法外访问不到
        this.x = x;//这里一定加this.,不然就访问不到
        this.y = y;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

}