如何初始化Java对象的数组 [英] How to initialize an array of objects in Java

问题描述

我要初始化二十一点游戏玩家对象的数组。我读过很多关于各种方法来初始化基本对象像int数组或字符串数​​组，但我不能拿这个概念是什么，我想在这里做（见下文）。我想回到初始化玩家对象的数组。创建播放对象的数目为我提示用户的整数。我想构造可以接受一个整数值，并依此命名的球员在初始化玩家对象的某些成员变量。我想我接近，但还是挺迷茫了。

 静态类播放器
{
    私人字符串名称;
    私人诠释handValue;
    私人布尔的BlackJack;
    私人TheCard []手;    公众播放器（int i）以
    {
        如果（我== 0）
        {
            this.Name =经销商;
        }
        其他
        {
            this.Name =Player_+将String.valueOf（ⅰ）;
        }
        this.handValue = 0;
        this.BlackJack = FALSE;
        this.Hand =新TheCard [2];
    }
}
私有静态播放器[] InitializePlayers（INT PlayerCount）
{//下面一行30永远不会完成
    播放器[] = thePlayers新的播放器[PlayerCount + 1]; //行30％的建议改变
    的for（int i = 0; I＆LT; PlayerCount + 1;我++）
    {
        thePlayers [I] =新播放器（ⅰ）;
    }
    返回thePlayers;
}
 

的 修改 - 更新：的
下面是我改变这之后得到我的理解你的建议：

 发[主]（暂停）
    。ClassNotFoundException异常（可抛出）LT; INIT＆GT;（字符串，可抛出）线：217
    。ClassNotFoundException的（例外）LT; INIT＆GT;（字符串，可抛出）行：不可用
    。ClassNotFoundException的＆LT;＆初始化GT;（字符串）行：不可用
    URLClassLoader的$ 1.run（）行：不可用
    在AccessController.doPrivileged（的PrivilegedExceptionAction＆LT; T＆GT ;,的AccessControlContext）行：不可用[本机方法]
    启动$的ExtClassLoader（的URLClassLoader）.findClass（字符串）行：不可用
    启动$ ExtClassLoader.findClass（字符串）行：不可用
    启动$的ExtClassLoader（ClassLoader的）.loadClass（字符串，布尔）行：不可用
    启动$ AppClassLoader器（classloader）.loadClass（字符串，布尔）行：不可用
    启动$ AppClassLoader.loadClass（字符串，布尔）行：不可用
    启动$ AppClassLoader器（classloader）.loadClass（字符串）行：不可用
    BlackJackCardGame.InitializePlayers（INT）行：30
    BlackJackCardGame.main（字符串[]）线：249
 

解决方案

这几乎是罚款。只要有：

 播放器[] = thePlayers新的播放器[playerCount + 1];
 

而让循环是：

 的for（int i = 0; I＆LT; thePlayers.length;我++）
 

和注意，Java习惯上还是会把方法和变量名称应该以小写开头。

更新：把你的方法的类体内

。

I want to initialize an array of Player objects for a BlackJack game. I've read a lot about various ways to initialize primitive objects like an array of ints or an array of strings but I cannot take the concept to what I am trying to do here (see below). I would like to return an array of initialized Player objects. The number of player objects to create is an integer for which I prompt the user. I was thinking the constructor could accept an integer value and name the player accordingly while initializing some member variables of the Player object. I think I am close but still quite confused too.

static class Player
{
    private String Name;
    private int handValue;
    private boolean BlackJack;
    private TheCard[] Hand;

    public Player(int i)
    {
        if (i == 0)
        {
            this.Name = "Dealer"; 
        }
        else
        {
            this.Name = "Player_" + String.valueOf(i);
        }
        this.handValue = 0;
        this.BlackJack = false;
        this.Hand = new TheCard[2];
    } 
}
private static Player[] InitializePlayers(int PlayerCount)
{                                                                   // line 30 below never completes
    Player[] thePlayers = new Player[PlayerCount + 1];      // line 30 changed per suggestions
    for(int i = 0; i < PlayerCount + 1; i++)
    {
        thePlayers[i] = new Player(i);
    }
    return thePlayers;
}

EDIT - UPDATE: Here is what I am getting after changing this as I understood your suggestion:

Thread [main] (Suspended)   
    ClassNotFoundException(Throwable).<init>(String, Throwable) line: 217   
    ClassNotFoundException(Exception).<init>(String, Throwable) line: not available 
    ClassNotFoundException.<init>(String) line: not available   
    URLClassLoader$1.run() line: not available  
    AccessController.doPrivileged(PrivilegedExceptionAction<T>, AccessControlContext) line: not available [native method]   
    Launcher$ExtClassLoader(URLClassLoader).findClass(String) line: not available   
    Launcher$ExtClassLoader.findClass(String) line: not available   
    Launcher$ExtClassLoader(ClassLoader).loadClass(String, boolean) line: not available 
    Launcher$AppClassLoader(ClassLoader).loadClass(String, boolean) line: not available 
    Launcher$AppClassLoader.loadClass(String, boolean) line: not available  
    Launcher$AppClassLoader(ClassLoader).loadClass(String) line: not available  
    BlackJackCardGame.InitializePlayers(int) line: 30   
    BlackJackCardGame.main(String[]) line: 249  

解决方案

It is almost fine. Just have:

Player[] thePlayers = new Player[playerCount + 1];

And let the loop be:

for(int i = 0; i < thePlayers.length; i++)

And note that java convention dictates that names of methods and variables should start with lower-case.

Update: put your method within the class body.

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