怎样通过javabean接收索引属性？

[Saro]

<check name="habit" value="swim" >
<check name="habit" value="game" >
...........

javabean;

private String[] habit;

public String[] getHabit(){
return this.habit;
}
public String getHabit(int index){
return this.habit[index];
}
public void setHabit(String[] habit){
this.habit=habit;
}
public void setHabit(int index,String value){
this.habit[index]=value;
}

我这样写应该没错吧？可始终都出错。

[Yanglintao]

habit=new String[数量];