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/**********Customer .java   begin***********/
import java.util.HashSet;
import java.util.Set;
/**
 * Èç¹ûÁ½¸öCustomer¶ÔÏónamaÊôÐÔºÍageÊôÐÔÏàͬ£¬ÄÇôÕâÁ½¸öCustomer¶ÔÏóÏàµÈ¡£
 * @author Administrator
 *
 */
public class Customer {
 
 private String name;
 
 private int age;
 public String getName() {
  return name;
 }
 public int getAge() {
  return age;
 }
 public void setName(String name) {
  this.name = name;
 }
 public void setAge(int age) {
  this.age = age;
 }
 public Customer(String name, int age) {
  super();
  this.name = name;
  this.age = age;
 }
 
 public Customer(){}
    /**
     * Èç¹ûCustomerÀา¸ÇÁËObjectÀàÖеÄequals·½·¨£¬µ«Ã»Óи²¸ÇObjectÖеÄHashCode·½·¨£¬
     * ¾Í»áµ¼Öµ±Customer1.equals.(Customer2)Ϊtrueʱ£¬¶øCustomer1ºÍCustomer2µÄ¹þ
     * Ï£Âë²»Ò»¶¨Ò»Ñù£¬¾Í»áʹHashSetÎÞ·¨¹¤×÷¡£
     */
 @Override
 public boolean equals(Object obj) {
  if((obj instanceof Customer)){
   Customer other=(Customer) obj;
   if(this.name.equals(other.getName()) && this.age==other.getAge()) {
    return true;
   }
  }
  return false;
  
 }
 /**
  * ΪÁ˱£Ö¤HashSetµÄÕý³£¹¤×÷£¬Èç¹ûCustomerÀา¸ÇÁËequals·½·¨£¬Í¬Ê±Ò²Ó¦¸ÃÈ¥¸²¸ÇhashCode
  * ·½·¨£¬²¢ÇÒ±£Ö¤Á½¸öÏàµÈ¶ÔÏóµÄ¹þÏ£ÂëÒ²ÊÇÒ»Ñù¡£
  */
// @Override
 public int hashCode() {
  int result;
  result=(name==null?0:name.hashCode());
  result=result+age;
  return result;
 }
 
    public static void main(String args[]){
     Set set=new HashSet();
  &nb


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