package com.example.demo.prototype;

import org.springframework.beans.BeanUtils;

public class Player {
    private String name;
    private String age;
    private String email;
    private Integer ff;

    public Player() {
        //    Utils.setDefaultFiled(this);

    }


    @Override
    public String toString() {
        return "Player{" +
                "name='" + name + '\'' +
                ", age='" + age + '\'' +
                ", email='" + email + '\'' +
                ", ff=" + ff +
                '}';
    }


    public static void main(String[] args) throws InstantiationException, IllegalAccessException {
        Player player = new Player();
        player.age = "234";
        player.name = "asd";
        player.email = "qq";
        player.ff = 34;
        Player player2 = new Player();
        BeanUtils.copyProperties(player, player2);
        BeanUtils.copyProperties(player2, player);
        System.out.println(player2.toString());
        System.out.println(player.toString());
    }
}

Player{name='null', age='null', email='null', ff=null}
Player{name='asd', age='234', email='qq', ff=34}

Process finished with exit code 0