java循环嵌套的例子

package com.jredu.ch03;


import java.util.Scanner;


public class Test1 {


public static void main(String[] args) {
// TODO Auto-generated method stub
int i = 0;
Scanner sc = new Scanner(System.in);
int str = 666;
int pwd = 0;
System.out.println("请输入密码");
while (true) {
pwd = sc.nextInt();
if (pwd == 666) {
System.out.print("登录成功\n请输入取款金额：");
while (true) {
int num = sc.nextInt();
if (num % 100 == 0 && num <= 1000&&num>=0) {
System.out.println("您取出了" + num + "元");
System.out.println("交易完成，请取卡！");
return;
} else {
System.out.println("您输入的金额不合法请重新输入：");
}
}
} else {
i++;
}
if (i >= 3) {
System.out.println("密码错误，请取卡");
break;
}
System.out.println("密码错误请重新输入");


}


}


}