/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.stream.*;
 
class Person 
{
	private int id;
	private String name;
 
	public Person(String name, int id){
	    this.name = name;
	    this.id = id;
	}
 
	@Override
	public boolean equals(Object obj) {
	    if (obj == null) {
	        return false;
	    }
	    if (!Person.class.isAssignableFrom(obj.getClass())) {
	        return false;
	    }
	    final Person other = (Person) obj;
	    if ((this.name == null) ? (other.name != null) : !this.name.equals(other.name)) {
	        return false;
	    }
	    if (this.id != other.id) {
	        return false;
	    }
	    return true;
	}
 
	@Override
	public int hashCode() {
	    int hash = 3;
	    hash = 53 * hash + (this.name != null ? this.name.hashCode() : 0);
	    hash = 53 * hash + this.id;
	    return hash;
	}
 
	@Override
	public String toString()
	{
		return "Name: " + name + " ID: " + id;
	}
}
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		ArrayList<Person> persons = new ArrayList<>(); //add some elements
		persons.add(new Person("test1",3));
		persons.add(new Person("test1",4));
		persons.add(new Person("test2",3));
		persons.add(new Person("test1",3));
		Set<Person> result = persons.stream().collect(Collectors.toSet());
		result.stream().forEach(System.out::println);
	}
}