Use of static variables

static.java

import java.io.*;

class Animal{
	static int population = 0;
	public Animal(){
		System.out.println("Animal object created");
		population += 1;
	}
}
class Person{
	static int population = 0;
	public Person(){
		System.out.println("Person object created");
		population += 1;
	}
}

class Application
{
	public static void main(String args[]){
		Person p1,p2,p3;
		Animal a1,a2;
		p1 = new Person();
		p2 = new Person();
		p3 = new Person();
		a1 = new Animal();
		a2 = new Animal();
		System.out.println(Person.population);
		System.out.println(Animal.population);
	}
}