代码如下：

public static void main(String[] args) {
        String x = "";
        do {
            int random = (int) (Math.random()*100);
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入你要猜的数字：");
            int num = scanner.nextInt();

            if(num == random){
                System.out.println("恭喜你，猜对了！");
            }else{
                System.out.println("抱歉，你猜错了！");
            }
            System.out.println("请输入y继续？否则结束！");
            x = scanner.next();
        }while ("y".equals(x));
        System.out.println("游戏结束！");
    }

---

运行结果：