bookpk.java

来自「< J2EE应用开发详解>>一书全部的源代码. 本书基于J」· Java 代码 · 共 30 行

package com.j2ee14.ch17;

import java.io.Serializable;

/**
 * Book实体Bean的主键。
 */
public class BookPK implements java.io.Serializable {
  public String bookID;

  public BookPK(String id) {
	this.bookID = id;
  }

  public BookPK() {
  }

  public String toString() {
	return bookID;
  }

  public int hashCode() {
  	return bookID.hashCode();
  }
  
  public boolean equals(Object book) {
  	return ((BookPK)book).bookID.equals(bookID);
  }  
}