while的运用

[java]代码库

package two;

import java.util.Scanner;

public class Two8 {
	public static void main(String[] args) {
		System.out.println("MyShopping管理系统>购物结算\n");
		System.out.println("..........................");
		System.out.println("请选择购买的商品编号：");
		System.out.println("1.T恤      2.网球鞋      3.网球拍");
		System.out.println("..........................");
		Scanner input=new Scanner(System.in);
		String num = input.next();
		{
		while("1" .equals(num)){
			System.out.println("1.T恤         ￥245.0");
			
			System.out.println("是否继续(Y/N)");
			num=input.next();
		}
		while("2" .equals(num)){
			System.out.println("2.网球拍         ￥195.0");
			System.out.println("是否继续(Y/N)");
			num=input.next();
			
		}
		while("3" .equals(num)){
			System.out.println("3.网球拍         ￥279.0");
			System.out.println("是否继续(Y/N)");
			num=input.next();
		}
		
	}while("N" .equals(num)){
		System.out.println("结束程序！");
		num=input.next();
}
}