java set 过滤 重复对象

package vo;

public class User {

private int id;
private String name;
private String password;


public User(int id, String name, String password) {
super();
this.id = id;
this.name = name;
this.password = password;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((name == null) ? 0 : name.hashCode());
result = prime * result
+ ((password == null) ? 0 : password.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
User other = (User) obj;
if (name == null) {
if (other.name != null)
return false;
} else if (!name.equals(other.name))
return false;
if (password == null) {
if (other.password != null)
return false;
} else if (!password.equals(other.password))
return false;
return true;
}



}


package test1;

import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;

import vo.User;

public class Test2 {

/**
* @param args
*/
public static void main(String[] args) {
User u1 = new User(1,"Jacky","123456");
User u2 = new User(2,"Jacky","123456");
User u3 = new User(3,"CRT","123456");
User u4 = new User(4,"Lsp","123456");

System.out.println("equal==>"+(u1.equals(u2)));

Set set = new LinkedHashSet();
set.add(u1);
set.add(u2);
set.add(u3);
set.add(u4);

System.out.println("set size==>"+set.size());

Iterator iterator = set.iterator();
while(iterator.hasNext()){
User temp =(User)iterator.next();
System.out.println("temp username==>"+temp.getName());
}

}

}