对象的数组:模拟T次投掷骰子的Counter对象的用例:
Rolls.java 如下:所用类列表:Counter, StdOut, StdRandom 见page42
public class Rolls{ public static void main(String[] args){ int T = Integer.parseInt(args[0]);//转String为int
int SIDES = 6;
Counter[] rolls = new Counter[SIDES+1];//声明数组
for(int i=1;i<=SIDES;i++)
rolls[i] = new Counter(i + "'s");
for(int t=1;t<=T;t++){
int result = StdRandom.uniform(1,SIDES+1); //去随机数, 1-7
rolls[result].increment();//给1-7号元素自增1
}
for(int i=1;i<=SIDES;i++)
StdOut.println(rolls[i]);
}
}
打印结果: