Person.java

package com.giorgijvaridze.playground;

public class Person {
    private String first_name = "No name";
    private String last_name;
    private int age;
    public static int objCount = 0;

    public static void printObjCount(){
        System.out.println(objCount);
    }
    
    public Person() {
        objCount++;
        System.out.println("Created new Object");
    }

    private Person(String first_name, String last_name, int age) {
        this.first_name = first_name;
        this.last_name = last_name;
        this.age = age;
    }

    public void setFirstName(String first_name) {
        this.first_name = first_name;
    }

    public String getFirstName() {
        return first_name;
    }

    public void setLastName(String last_name) {
        this.last_name = last_name;
    }

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

    public void printInfo() {
        String result = String.format("name:%s lastname:%s age:%d", first_name,
                last_name, age);
        System.out.println(result);
    }
}