java - 尝试通过 toString() 打印对象

Question

我试图打印玩家类中的各个对象(表现、受伤和姓名)，并且在主类上我试图打印整个玩家对象，但是当我尝试执行 toString(); 时两个类上的方法，我只收到player@2eb3998c 或Main@37e6e526。我哪里出错了？

感谢您的帮助。

玩家等级:

  package com.laurens;

/**
* Created by laurensvanoorschot on 20-01-16.
*/
 public class player {
 private String name;
 private int performance;
 private boolean injured;

    public  player(int performance, boolean injured, String name) {
    this.injured = injured;
    this.name = name;
    this.performance = performance;
}

public boolean isInjured() {
    return injured;
}

public void setInjured(boolean injured) {
    this.injured = injured;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public int getPerformance() {
    return performance;
}

public void setPerformance(int performance) {
    this.performance = performance;
}

@Override
public String toString() {
    return "com.laurens.player{" +
            "injured=" + injured +
            ", name='" + name + '\'' +
            ", performance=" + performance +
            '}';
}
 }

主类:

  package com.laurens;
  public class Main {
    private player player;
   public static void main(String[] args) {
    player player = new player (4, true, "laurens");
    player.toString();
}


public com.laurens.player getPlayer() {
    return player;
}

@Override
public String toString() {
    return super.toString();
}

public void setPlayer (int performance, String name) {
    if (performance < 4) {

        boolean injured = true;


    }



}
}

Answer 1

很可能，您只是忘记重新编译您的类；您的 Player 代码没有问题(并且您的 Main 类中存在您不知道的错误，这表明无需重新编译)。也就是说，您发布的代码中没有任何内容实际打印任何内容。 System.out.println(实际上，任何 PrintWriter 打印方法)都会自动调用对象上的 toString()，因此无需执行任何操作你自己，只是

System.out.println(player);