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 int x;
    private int y;

    public Data(int x, int y) {//把构造方法的访问属性改为public，这样才能调用构造方法实例化一个对象
        this.x = x;//如果没有this.x，则相当于把形参x的值赋值给参数x（即自己给自己赋值，并不能将值传递给对象的x值）
        this.y = y;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

}