book.java

使用swing做的熟悉控件使用的DEMO

package book;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Collection;
import java.util.ArrayList;
import userexception.*;

/**
* class Book
*/
public class Book {
	private int bookid;
	private String name;
	private String author;
	private int booktype;
	private double cost;
	private String from;

        public static final int COMPUTER = 0;
        public static final int NONCOMPUTER = 1;
	public static final String KEY = "KEY";
	public static final String NAME = "NAME";
	public static final String AUTHOR = "AUTHOR";
	public static final String TYPE = "TYPE";
	public static final String COST = "COST";
	public static final String PUBLISH = "PUBLISH";
	
	//constructor
	public Book(int bookid, String name, String author, int booktype, double cost, String from) {
		this.bookid = bookid;
		this.name = name;
		this.author = author;
		this.booktype = booktype;
		this.cost = cost;
		this.from = from;
	}

	//getters and setters
	public int getBookId() {
		return bookid;
	}
	public double getCost() {
		return cost;
	}
	public String getName() {
		return name;
	}
	public String getAuthor() {
		return author;
	}
	public String getFrom() {
		return from;
	}
	public int getBookType() {
		return booktype;
	}
	
	public void setBookId(int id) {
		this.bookid = id;
	}
	public void setName(String name) {
		this.name = name;
	}
	public void setAuthor(String author) {
		this.author = author;
	}
	public void setFrom(String from) {
		this.from = from;
	}
	public void setBookType(int booktype) {
		this.booktype = booktype;
	}
	public void setCost(double cost) {
		this.cost = cost;
	}

	//overridding toString()
	public String toString() {
		String strTmp = "";
		if(this.booktype == COMPUTER) {
			strTmp = "Book Type => " + "COMPUTER";
		}else {
			strTmp = "Book Type => " + "NONCOMPUTER";
		}
		return ("/*************************/" +
		"\nBook ID => " + this.bookid +
		"\nBook Name => " + this.name +
		"\nBook Author => " + this.author +
		"\nBook Cost => " + this.cost +
		"\n" + strTmp +
		"\nPublishing House => " + this.from +
		"\n/*************************/");
	}

	//overridding equals()
	public boolean equals(Object o) {
		System.out.println("equals");
		if(!(o instanceof Book)) return false;
		return (name.equals(((Book)o).name) && author.equals(((Book)o).author));
	}
	public int hashCode() {
		return (new Integer(bookid)).hashCode();
	}
}