图书管理系统（用数组完成）

练习：用数组写一个图书管理系统（增删改查）

方法一：

Book类

package Bookmanager;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
 * 
 * 
 * 
 * */
public class Book {
          
   
	private String id;
	private String name;
	private String author;
	private Date   date;
	
	
	public Book() {
          
   
		super();
		// TODO Auto-generated constructor stub
	}
	
	public Book(String id, String name, String author, Date date) {
          
   
		super();
		this.id = id;
		this.name = name;
		this.author = author;
		this.date = date;
	}

	public String getId() {
          
   
		return id;
	}
	public void setId(String id) {
          
   
		this.id = id;
	}
	public String getName() {
          
   
		return name;
	}
	public void setName(String name) {
          
   
		this.name = name;
	}
	public String getAuthor() {
          
   
		return author;
	}
	public void setAuthor(String author) {
          
   
		this.author = author;
	}
	public Date getDate() {
          
   
		return date;
	}
	public void setDate(Date date) {
          
   
		this.date = date;
	}

	@Override
	public String toString() {
          
   
		String datestr="";
		SimpleDateFormat  sdf = new SimpleDateFormat("yyyy-MM-dd");  //实现字符串和日期之间互转
		datestr =sdf.format(date);//把一个日期对象转为指定格式字符串
		
		return "Book [author=" + author + ", date=" +datestr+ ", id=" + id + ", name=" + name + "]";
	} 
	
}

Test类

方法二：