程序代码：

public static void main(String[] args) {
        int suit[] = new int[16]; 

        boolean sw[] = new boolean[16]; 

        int key = 0;
        for (int i = 0; i < suit.length; i++) {
            while (true) {
                key = (int) (Math.random() * 16);
                if (sw[key] == false) {
                    break;
                }
            }
            suit[i] = key;
            sw[key] = true;
        }
        for (int i = 0; i < suit.length; i++) {
            System.out.println(suit[i] + " ");
        }
    }