Remove duplicates using HashSet

1 package com. test;
2
3 public class Person {
4
5 private String id;
6 private String name;
7
8 public String getId (){
9 return id;
10}
11
12 public void setId (String id ){
13 this. id = id;
14}
15
16 public String getName (){
17 return name;
18}
19
20 public void setName (String name ){
21 this. name = name;
22}
23
24 @ Override
25 public int hashCode (){
26 int result;
27 result = (name = null? 0: name. hashCode ());
28 result = 37 * result + (id = null? 0: id. hashCode ());
29 return result;
30}
31
32 @ Override
33 public boolean equals (Object obj ){
34 if (this = obj ){
35 return true;
36}
37 if (! (Obj instanceof Person )){
38 return false;
39}
40 final Person other = (Person) obj;
41 if (this. id. equals (other. getId () & this. name. equals (other. getName ())){
42 return true;
43} else {
44 return false;
45}
46}
47
48}

 

 

 

 

1 package com. test;
2
3 import java. util. HashSet;
4 import java. util. Iterator;
5
6 public class HashSetTest {
7 public static void main (String [] args ){
8 Person person1 = new Person ();
9 Person person2 = new Person ();
10 Person person3 = new Person ();
11
12 person1.setId ("1 ");
13 person1.setName ("test1 ");
14 person2.setId ("1 ");
15 person2.setName ("test1 ");
16 person3.setId ("2 ");
17 person3.setName ("test1 ");
18
19 HashSet set = new HashSet ();
20 set. add (person1 );
21 set. add (person2 );
22 set. add (person3 );
23
24 System. out. println (set. size ());
25
26 Iterator iter = set. iterator ();
27 while (iter. hasNext ()){
28 Person temp = (Person) iter. next ();
29 System. out. println (temp. getId () + ":" + temp. getName ());
30}
31
32
33}
34}