public static void main(String[] args) {
    System.out.println("欢迎进入游戏迷你平台");
    System.out.println("请选择你喜欢玩的游戏：");
    System.out.println("***********************");
    System.out.println("1.斗地主");
    System.out.println("2.斗牛");
    System.out.println("3.泡泡龙");
    System.out.println("4.连连看");
    System.out.println("************************");
    Scanner scanner = new Scanner(System.in);
    System.out.println("请输入数字:");
    int num=scanner.nextInt();
    switch (num){
        case 1:
            System.out.println("你已进入斗地主房间！");
            break;
        case 2:
            System.out.println("你已进入斗牛房间！");
            break;
        case 3:
            System.out.println("你已进入泡泡龙房间！");
            break;
        case 4:
            System.out.println("你已进入连连看房间！");
    }
}

课堂笔记和练习，希望对大家有帮助！