DVD

package cn.zc.com;

import java.util.Date;

public class DVD {
	  public int id;  
      public String nema;  
      public boolean stste=true;  
      public Date date;  
     
}

package cn.zc.com;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;


public class DVDMgr {
	 public DVDMgr() {  
	        init();// 初始化方法  
	  
	    }  
	    SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");  
	    Scanner input=new Scanner(System.in);
	    //  
	    DVD[] dvds = new DVD[100];  
	  
	    public void init() {  
	  
	        String[] name = new String[] { "赌神", "赌圣", "赌侠", "邪恶力量", "地心引力" };  
	        //给dvd初始化值 数组名 赋值   
	        for (int i = 0; i < name.length; i++) {  
	  
	            dvds[i] = new DVD();  
	            dvds[i].id = i;  
	            dvds[i].nema = name[i];  
	        }  
	    }  
	  
	    public void menu() {  
	        p("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$");  
	        p("++++++++++++++++++欢迎你使用迷你版DVD++++++++++++++++++");  
	        p("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$");  
	  
	        p("1.新曾DVD");  
	        p("2.查看DVD");  
	        p("3.删除DVD");  
	        p("4.借出DVD");  
	        p("5.归还DVD");  
	        p("6.退出DVD");  
	        p("&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&");  
	        p("请选择:");  
	    }  
	  
	    public void show() {  
	  
	        while (true) {  
	            menu();  
	            int ch = input.nextInt();  
	            switch (ch) {  
	            case 1:  
	                p("1.新曾DVD");  
	                add();  
	                break;  
	            case 2:  
	                p("2.查看DVD");  
	                showDVd();  
	  
	                break;  
	            case 3:  
	                p("3.删除DVD");  
	                del();  
	                  
	                break;  
	            case 4:  
	                p("4.借出DVD");  
	                borrow();  
	                break;  
	            case 5:  
	                p("5.归还DVD");  
	                revert();  
	                break;  
	            case 6:  
	                p("6.退出DVD");  
	                return;  
	            default:  
	                p("输入错误");  
	                break;  
	            }  
	            p("输入0返回");  
	            input.next();  
	  
	        }  
	  
	    }  
	  
	    private void revert() {  
	        p("请输入归还dvd的编码:");  
	        int id=input.nextInt();  
	        for (int i = 0; i < dvds.length; i++) {  
	            if(dvds[i]!=null&& dvds[i].id==id){  
	                if(!dvds[i].stste){  
	                    dvds[i].stste=true;  
	                    int day=(int)Math.ceil((System.currentTimeMillis()-dvds[i].date.getTime())*1.0/1000/60/60/24);  
	                    System.out.println("归还成功！");  
	                    p("借出日期:"+sdf.format(dvds[i].date));  
	                    p("归还日期"+sdf.format(new Date()));  
	                    p("应付租金"+day*1.0+"￥");  
	                }else{  
	                    p("不能归还");  
	                }  
	                  
	                return;  
	            }  
	        }  
	      
	        p("归还失败");  
	    }  
	    private void borrow() {  
	        showDVd();  
	        System.out.println("请输入要借的dvd编码：");  
	        int id=input.nextInt();  
	        for (int i = 0; i < dvds.length; i++) {  
	            if(dvds[i]!=null&& dvds[i].id==id){  
	                if(dvds[i].stste){  
	                    dvds[i].stste=false;  
	                    dvds[i].date=new Date();  
	                    System.out.println("借出成功！");  
	                }else{  
	                    p("不能借出");  
	                }  
	                  
	                return;  
	            }  
	        }  
	      
	        p("还不能借出");  
	    }  
	          
	      
	  
	    private void del() {  
	        showDVd();  
	        System.out.println("请输入要删除dvd编码：");  
	          
	        int id=input.nextInt();  
	        for (int i = 0; i < dvds.length; i++) {  
	            if(dvds[i]!=null&& dvds[i].id==id){  
	                if(dvds[i].stste){  
	                    dvds[i]=null;  
	                    System.out.println("删除成功！");  
	                }else{  
	                    p("抱歉,不能删除");  
	                }  
	                  
	                return;  
	            }  
	        }  
	      
	        p("删除失败");  
	    }  
	  
	      
	          
	      
	  
	    // 新增  
	    private void add() {  
	        for (int i = 0; i < dvds.length; i++) {  
	            if (dvds[i] == null) {  
	                dvds[i] = new DVD();  
	                p("请输入要增加的dvd的名称");  
	                dvds[i].nema = input.next();  
	                dvds[i].id = getId();  
	                p("是否继续y/n");  
	                char a = input.next().toLowerCase().charAt(0);  
	                if (a == 'n') {  
	                    break;  
	                }  
	            }  
	  
	        }  
	  
	    }  
	  
	    private int getId() {  
	        int max = 0;  
	        for (DVD dvd : dvds) {  
	            // 如果当前元素不为空 并且当前元素>id最大值 给最大的值赋值  
	            if (dvd != null && dvd.id > max) {  
	                max = dvd.id;  
	  
	            }  
	              
	  
	        }  
	        return max + 1;  
	    }  
	  
	    // 查看 三元表达式  
	    private void showDVd() {  
	          
	        p("序号\t名称\t\t状态\t借出日期");  
	        for (DVD dvd : dvds) {  
	            if (dvd != null) {  
	                // 三元表达式  
	                String date = dvd.date == null ? "" :sdf.format(dvd.date) ;  
	                String s = dvd.stste ? "可借" : "对不起,已借出";  
	                p(dvd.id + "\t" + dvd.nema + "\t\t" + s + "\t" + date);  
	            }  
	        }  
	  
	    } 
	  
	    public void p(Object obj) {  
	        System.out.println(obj);  
	  
	    }
	    }

package cn.zc.com;

public class TsetDVDMgr {

		  public static void main(String[] args) {  
		        DVDMgr dvd=new DVDMgr();  
		        dvd.show();  
	}

}