package w; import java.util.Random; import java.util.Scanner; public class menu { public static void main(String[] args) { mainMenu(); } public static void mainMenu() { Scanner input = new Scanner(System.in); System.out.println("1.登录"); System.out.println("2.注册"); System.out.println("3.幸运抽奖"); System.out.println("4.看小故事,"); System.out.println("5.退出系统"); System.out.println("请选择"); int i = input.nextInt(); switch (i) { case 1: login(); break; case 2: zhuce(); break; case 3: choujiang(); break; case 4: gushi(); break; case 5: tuichu(); break; } } private static void tuichu() { System.out.println("谢谢使用"); } private static void gushi() { Scanner input = new Scanner(System.in); System.out.println("请选择想看的故事"); System.out.println("1.灰姑娘"); System.out.println("2.小红帽"); System.out.println("3.白雪公主"); int y = input.nextInt(); switch (y) { case 1: System.out.println( "灰姑娘是一个童话故事中的角色,讲述女主人公灰姑娘母亲的离世,新家庭成员对她的欺侮。后来因为一场舞会邂逅王子,王子通过水晶鞋找到灰姑娘,灰姑娘和王子举行结婚典礼在一起了,灰姑娘从此以后过着幸福快乐的生活。"); break; case 2: System.out.println("从前有个小姑娘,喜欢带着外婆送给他的红色帽子,大家都叫他小红帽"); break; case 3: System.out.println( "美丽善良的白雪公主多次遭继母的暗害,但是在七个小矮人和王子的帮助下白雪公主获得了新生,而贪恋美貌的王后得到了惩罚,最后王子和公主幸福的在一起了。这个故事告诉大家要像白雪公主一样拥有一颗善良的心。"); break; } returnMain(); } private static void choujiang() { Scanner input = new Scanner(System.in); System.out.println("请输入四位会员卡号"); int x = input.nextInt(); Random r = new Random(); int a = r.nextInt(10); if (x / 10 % 10 == a) { System.out.println("恭喜你中奖啦!"); } else { System.out.println("谢谢参与"); } returnMain(); } private static void zhuce() { Scanner input = new Scanner(System.in); System.out.println("请输入用户名"); String name = input.next(); System.out.println("请输入密码"); String mima = input.next(); System.out.println("注册成功"); returnMain(); } private static void login() { Scanner input = new Scanner(System.in); System.out.println("输入用户名"); String uname = input.next(); System.out.println("输入密码"); String upwd = input.next(); if (uname.equals("zs") && upwd.equals("123")) { System.out.println("登录成功"); } else { System.out.println("登录失败"); } returnMain(); } public static void returnMain() { System.out.println("是否返回主菜单?Y/N"); Scanner input = new Scanner(System.in); if (input.next().equalsIgnoreCase("Y")) { mainMenu();} else{System.out.println("谢谢使用"); } } }
package w; public class menu { public static void main(String[] args) { System.out.println(jc(5)); } private static int jc(int a) { int p=1; for(int i=1;i<=a;i++){ p*=i; } return p; } }
package w; public class menu { public static void main(String[] args) { year(2011); } private static void year(int a) { if (a % 4 == 0 || a % 100 != 0 && a % 400 == 0) { System.out.println("闰年"); } else { System.out.println("不是闰年"); } } }