Person Class

public class Person implements Comparable<Person>{
    private String name;
    private int age;
    private String address;

    Person() {

    }

    Person(String name, int age, String address) {
        this.name = name;
        this.age = age;
        this.address = address;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public int compareTo(Person person) {
        if (this.getName().compareTo(person.getName()) != 0)
            return this.getName().compareTo(person.getName());
        else
            if (this.getAge() > person.getAge()) return 1;
            else if (this.getAge() < person.getAge()) return -1;
            return 0;
    }