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();
            int y = scanner.nextInt();
            Data data = new Data(x, y);
            System.out.println(data.getX() + data.getY());
        }
    }

}

class Data {
//private是私有
    private int x;
    private int y;
//这里构造方法，不能用private，可以用public和protected
    public Data(int x, int y) {
        this.x = x;
        this.y = y;
    }
//还有就是如果定义的属性是私有的话，就要用getter和getter去设置属性和得到属性
    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

}