Java简单的DVD租借程序

import java.util.*; public class DVDMgr { DVDSet dvd = new DVDSet(); Scanner input = new Scanner(System.in); public void setData(){ dvd.initial(); } public void startMenu(){ System.out.println("欢 迎 使 用 MinuDVD Mgr 1.0"); System.out.println("--------------------------------------------------------------------------------------------------"); System.out.println("1.查看DVD\n2.借出DVD\n3.退出MiniDVD Mgr"); System.out.println("--------------------------------------------------------------------------------------------------"); int choice; System.out.println("请选择:"); choice = input.nextInt(); do{ switch(choice){ case 1: //执行查询 Search(); break; case 2: //标记借出 lend(); break; case 3: System.out.println("\n欢迎使用！"); break; default: System.out.println("输入错误！请重新输入！"); System.out.println("请选择:"); choice = input.nextInt(); } }while(choice < 4); } public void Search(){ System.out.println("MyDVD Mgr 1.0 --->查询DVD\n"); for(int i=0;i<dvd.name.length;i++){ if(dvd.name[i] == null){ break; }else if(dvd.state[i] == 0){ System.out.println(dvd.name[i]+"\t\t"+"已借出"); }else if(dvd.state[i] == 1){ System.out.println(dvd.name[i]+"\t\t"+"在库"); }else{ System.out.println("状态错误！"); } } System.out.println("-------------------------------------------------------------------------"); returnMain(); } public void returnMain(){ System.out.println("输入0返回："); int num = input.nextInt(); if(num == 0){ startMenu(); } } public void lend(){ System.out.println("MyDVD Mgr 1.0 --->借出DVD\n"); String DVDName; boolean DVD = false; System.out.println("请输入要借的DVD的名称:"); DVDName = input.next(); for(int i=0;i<dvd.name.length;i++){ if(DVDName.equals(dvd.name[i])&&(dvd.state[i] == 1)){ dvd.state[i] = 0; DVD = true; System.out.println("可以借"); break; }else if(DVDName.equals(dvd.name[i])&&(dvd.state[i] == 0)){ System.out.println("已借出"); DVD = true; break; } } if(DVD == false){ System.out.println("没有此片！"); } returnMain(); } }