User.java

package com.yurii.salimov.lesson08.task05;

/**
 * @author Yuriy Salimov (yuriy.alex.salimov@gmail.com)
 * @version 1.0
 */
public class User {

    private final String firstName;
    private final String lastName;

    public User(final String firstName, final String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }

    @Override
    public boolean equals(final Object object) {
        if (object == null) {
            return false;
        }
        if (this == object) {
            return true;
        }
        if (getClass() != object.getClass()) {
            return false;
        }
        final User user = (User) object;
        return this.firstName != null ? this.firstName.equals(user.firstName) : user.firstName == null &&
                (this.lastName != null ? this.lastName.equals(user.lastName) : user.lastName == null);

    }

    @Override
    public int hashCode() {
        int result = firstName != null ? firstName.hashCode() : 0;
        result = 31 * result + (lastName != null ? lastName.hashCode() : 0);
        return result;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }
}