Porownanie objektow za pomoca wygenerowanej metody equals

package test_package;

public class User {

	private String name;
	private String surname;
	private String eMail;

	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getSurname() {
		return surname;
	}
	public void setSurname(String surname) {
		this.surname = surname;
	}
	public String geteMail() {
		return eMail;
	}
	public void seteMail(String eMail) {
		this.eMail = eMail;
	}

//	public User(){}

	public User (String name, String surname, String eMail){
		setName(name);
		setSurname(surname);
		seteMail(eMail);
	}

	@Override
	public String toString() {
		return "User: name= " + name + ", surname= " + surname + ", eMail= "
				+ eMail;
	}
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((eMail == null) ? 0 : eMail.hashCode());
		result = prime * result + ((name == null) ? 0 : name.hashCode());
		result = prime * result
				+ ((surname == null) ? 0 : surname.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 (eMail == null) {
			if (other.eMail != null)
				return false;
		} else if (!eMail.equals(other.eMail))
			return false;
		if (name == null) {
			if (other.name != null)
				return false;
		} else if (!name.equals(other.name))
			return false;
		if (surname == null) {
			if (other.surname != null)
				return false;
		} else if (!surname.equals(other.surname))
			return false;
		return true;
	}

}
 

package test_package;

public class Test_user {

	public static void main(String[] args) {
		User[] users = new User[8];
		users[0] = new User("Tomek", "Atomek", "tAtomek@poczta.pl");
		users[1] = new User("Wojtek", "Kowalski", "wKowalski@poczta.pl");
		users[2] = new User("Anna", "Hanna", "aHanna@poczta.pl");
		users[3] = new User("Wojtek", "Kowalski", "wKowalski@poczta.pl");
		users[4] = new User("Tomek", "Atomek", "tAtomek@poczta.pl");
		users[5] = new User("Tomek", "Atomek", "tAtomek@poczta.pl");
		users[6] = new User("Tomek", "Atomek", "tAtomek@poczta.pl");
		users[7] = new User("Anna", "Hanna", "aHanna@poczta.pl");
//		users[8] = new User("Tomek", "Atomek", "tAtomek@poczta.pl");

		User[] temp = new User[users.length];
		for (int i = 0; i < users.length -1; i++) {
			for (int j = i +1; j < users.length -1 ; j++) {
				if (!users[i].equals(users[j])) {
					temp[i] = users[i];
				}
			}
		}
//		for (int i = 1; i < users.length; i++) {
//			if (users[i-1]!= users[i]) {
//				temp[i] = users[i];
//			}
//		}
		for (int i = 0; i < temp.length; i++) {
			if (temp[i] != null) {
						System.out.println(temp[i]);
					}

		}
	}

} 

        users[0] = new User("Tomek", "Atomek", "tAtomek@poczta.pl");
        users[1] = new User("Anna", "Hanna", "aHanna@poczta.pl");
        users[2] = new User("Anna", "Hanna", "aHanna@poczta.pl");

        users[0] = new User("Tomek", "Atomek", "tAtomek@poczta.pl");
        users[1] = new User("Tomek", "Atomek", "tAtomek@poczta.pl");
        users[2] = new User("Tomek", "Atomek", "tAtomek@poczta.pl");

				for(int i= 0; i <= sheet.getLastRowNum(); i++ ){
						row = sheet.getRow(i);
						String name = row.getCell(0).getStringCellValue();
						String surname = row.getCell(1).getStringCellValue();
						String email = row.getCell(2).getStringCellValue();
						}

Set<User>

package test_package;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

public class Test_user_Set {

	public static void main(String[] args) {

		Set<User> users = new HashSet<>();

		users.add(new User("Tomek", "Atomek", "tAtomek@poczta.pl"));
		users.add(new User("Wojtek", "Kowalski", "wKowalski@poczta.pl"));
		users.add(new User("Anna", "Hanna", "aHanna@poczta.pl"));
		users.add(new User("Tomek", "Atomek", "tAtomek@poczta.pl"));
		users.add(new User("Wojtek", "Kowalski", "wKowalski@poczta.pl"));

		System.out.println(users.size());

		Iterator<User> usersIterator = users.iterator();
		while (usersIterator.hasNext()) {
			User user = (User) usersIterator.next();
			System.out.println(user);
		}
	}

}

		Iterator<User> usersIterator = users.iterator();
		while (usersIterator.hasNext()) {
			User user = (User) usersIterator.next();
			System.out.println(user.getName() + " "+user.getSurname()+ " " + user.geteMail() );
		}

					for(int i= 1; i <= sheet.getLastRowNum(); i++ ){
						row = sheet.getRow(i);
						String name = row.getCell(0).getStringCellValue();
						String surname = row.getCell(1).getStringCellValue();
						String email = row.getCell(2).getStringCellValue();	
						}

System.out.println(user.getSurname());

User user = usersIterator.next();

Set<User> users = new LinkedHashSet<>();

Set<User> users = new LinkedHashSet<>();

for(int i= 1; i <= sheet.getLastRowNum(); i++ ){
                        row = sheet.getRow(i);
                        String name = row.getCell(0).getStringCellValue();
                        String surname = row.getCell(1).getStringCellValue();
                        String email = row.getCell(2).getStringCellValue();    
                        users.add(new User(name, surname, email));
                        }