（7）循环语句

import java.util.Scanner;public class a_java {public static void main(String[] args) {int week = 0;System.out.print("请输入1~5任意一个数字\t");Scanner scan = new Scanner(System.in);int your_num = scan.nextInt();week = your_num;System.out.println("今天星期几？");switch(week){case 1:System.out.println("星期一");break;case 2:System.out.println("周二");break;case 3:System.out.println("周三");break;case 4:System.out.println("星期四");break;case 5:System.out.println("星期五1");break;default:System.out.println("没有结果。");}}}

<pre name="code" class="java">Scanner scan = new Scanner(System.in);System.out.print("请输入登录名:\t");String user_name = scan.nextLine();System.out.print("请输入登录密码:\t");String password = scan.nextLine();if(!user_name.equals("mr")){System.out.print("用户名非法！！！");}else if(!user_name.equals("mrsoft")){System.out.print("登录密码错误！！！");}else{System.out.print("登录OK~~6666666666666666666");}