package com.MyJava;
import java.util.Scanner;public class While {public static void main(String[] args) {Scanner Myscan = new Scanner(System.in);	int i = 0,n = 3;	//n为有效密码次数System.out.print("请输入密码：");String Password = Myscan.nextLine();while(!Password.equals("123")&&i<n) {i++;if(i<n) {System.out.print("密码错误" + "您还有");System.out.print(n-i);	System.out.println("次机会，请输入密码：");Password = Myscan.nextLine();}else{System.out.print("您的银行卡已冻结！");}}Myscan.close();if(i<=3) 	//也可以写成：if(Password.equals("123")){System.out.print("密码正确");}}
}