为什么这个对象数组中的每个元素都被最后一个对象覆盖? [英] Why does each element in this array of objects get overwritten by the last object?

问题描述

我有以下代码:

public static void main(String[] args) {
  Player players[] = new Player[2];
  Scanner kb = new Scanner(System.in);
  System.out.println("Enter Player 1's name");
  players[0] = new Player(kb.nextLine());
  System.out.println("Enter Player 2's name");
  players[1] = new Player(kb.nextLine());
  System.out.println("Welcome "+ players[0].getName() + " and " + players[1].getName());    
}

它的目的是创建一个新的播放器对象并存储播放器的名称，同时保留数组中的所有对象.

It is meant to create a new player object and store the name of the player, while keeping all the objects in the array.

这是播放器类:

public class Player {
  static String name;
  public Player(String playerName) {
    name = playerName;
  }

  public String getName(){
    return name;
  } 
}

实际发生的是，当我只有 1 个对象时它可以工作，但是当我有 2 个时，数组中的每个元素都与第二个相同.当数组中有 3 个对象时，每个元素与第 3 个相同，依此类推

What actually happens is that it works when I just have 1 object, but when I have 2, each element in the array is the same as the second. When I have 3 objects in the array, each element is the same as the 3rd, etc.

我不确定为什么会发生这种情况，或者如何纠正它，这让我困惑了几个小时:/

I'm not sure why this is happening, or how to correct it, and it's been baffling me for hours :/

推荐答案

是因为静态字段.静态用于跨对象实例.它们存储在类级别.

Its because of the static field. Statics are used across object instances. They are stored at class level.

下面的代码可以工作:

class Player
{
    String name;

    public Player(String playerName)
    {
        name = playerName;
    }

    public String getName()
    {
        return name;
    }
}

这篇关于为什么这个对象数组中的每个元素都被最后一个对象覆盖?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！