java: BufferedReader简单的菜单

BufferedReader简单的菜单

Menu

boolean flag;

	public Menu()
	{
		while(true)
		{
			this.show();
		}
	}

	public void show()
	{
		System.out.println("--------菜单管理--------");
		System.out.println("    [1] 创建菜单      ");
		System.out.println("    [2] 修改菜单      ");
		System.out.println("    [3] 删除菜单      ");
		System.out.println("    [0] 退出菜单      ");
		System.out.println("请选择相关的菜单进行操作:");

		BufferedReader buf = null;
		buf = new BufferedReader( new InputStreamReader( System.in ) );
		String str = null;
		int i = 0;
		this.flag = true;
		while(flag)
		{
			try {
				str = buf.readLine();
			} catch (IOException e) {
				// TODO 自动生成的 catch 块
				e.printStackTrace();
			}
			if(str.matches("\\d"))
			{
				i = Integer.parseInt(str);
				operater(i);
			}else{
				System.out.println("请重新选择一个菜单：");
			}
		}

	}

	public void operater(int i)
	{

		switch(i)
		{
		case 1:
			MenuOperater.add();
			break;
		case 2:
			MenuOperater.update();
			break;
		case 3:
			MenuOperater.del();
			break;
		case 0:
			this.flag = false;
			MenuOperater.exit();
			System.exit(1);
			break;
		default:
			System.out.println("您输入了一个错误的数字");
			break;

		}
	}

MenuOperater

public static void add()
	{
		System.out.println("新建菜单操作");
	}

	public static void update()
	{
		System.out.println("修改菜单操作");
	}

	public static void del()
	{
		System.out.println("删除菜单操作");
	}

	public static void exit()
	{
		System.out.println("退出菜单");
	}

BufferedReaderDemo3

public static void main(String[] args) {
		// TODO 自动生成的方法存根
		new Menu();

	}