如何在Java中初始化对象数组
我想初始化一个BlackJack游戏的Player对象数组。我已经阅读了很多有关初始化原始对象(例如int数组或字符串数组)的各种方法的信息,但是我无法将此概念理解为我在此处尝试做的事情(见下文)。我想返回一个初始化的Player对象数组。要创建的播放器对象的数量是一个整数,我向用户提示。我以为构造函数可以接受一个整数值并在初始化Player对象的一些成员变量时相应地命名播放器。我想我很亲密,但仍然很困惑。
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)
{ //The line below never completes after applying the suggested change
Player[PlayerCount] thePlayers;
for(int i = 0; i < PlayerCount + 1; i++)
{
thePlayers[i] = new Player(i);
}
return thePlayers;
}
编辑-更新: 这是我了解您的建议后所做的更改:
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
回答:
差不多了 只需:
Player[] thePlayers = new Player[playerCount + 1];
并让循环成为:
for(int i = 0; i < thePlayers.length; i++)
请注意,Java约定规定方法和变量的名称应以小写字母开头。
更新:将您的方法放在类主体中。
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