Question

java 升级菜单切换

public static void main(String[] args) { System.out.println("欢迎使用MyShipping管理系统");
System.out.println();
System.out.println("*******************************");
System.out.println("1.客户信息管理");
System.out.println("2.购物结算");
System.out.println("3.真情回顾");
System.out.println("4.注销");

Boolean isRight= true;

do{
Scanner input = new Scanner(System.in);
System.out.print("请选择，输入数字：");
int No = input.nextInt();

switch(No){
case 1:
System.out.println("执行客户信心管理");break;
case 2:
System.out.println("执行购物结算");break;
case 3:
System.out.println("执行真情回顾");break;
case 4:
System.out.println("执行注销");break;
default:
isRight = false;
System.out.print("输入错误，请重新输入数字：");
No = input.nextInt();
}
System.out.println();
System.out.println("程序结束");
}while(!isRight);
}
}
怎么改才能跟要求的一样？就是输入错误数字，显示“输入错误，请重新舒茹茹数字：”然后输入正确的数字，显示相应的内容，最后是“程序结束”

Answer 1

package com.test;
import java.util.Scanner;
public class ScannerTest { public static void main(String[] args) {
System.out.println("欢迎使用MyShipping管理系统");
System.out.println();
System.out.println("*******************************");
System.out.println("1.客户信息管理");
System.out.println("2.购物结算");
System.out.println("3.真情回顾");
System.out.println("4.注销");
Boolean isRight = true; Scanner input = new Scanner(System.in);
System.out.print("请选择，输入数字：");
do {

int No = input.nextInt();
switch (No) {
case 1:
isRight = true;
System.out.println("执行客户信心管理");
break;

case 2:
isRight = true;
System.out.println("执行购物结算");
break;

case 3:
isRight = true;
System.out.println("执行真情回顾");
break;

case 4:
isRight = true;
System.out.println("执行注销");
break;

default:
isRight = false;
System.out.print("输入错误，请重新输入数字：");
}
} while (!isRight);
System.out.println("程序结束");
}
}