Program to Demonstrate Static & this Keyword

     This program is used to demonstrate static variable, static member and this keyword.

import java.io.*;

import java.util.*;

class Employee

{

            String fn,ln;

            static int count=0; 

            Employee( String s,String s1)

            {

                        count++;

                        fn=s;

                        ln=s1;

            }

            String getfirst()

            {

                        return this.fn;

            }

            String getlast()

            {

                        return this.ln;

            }

            static void getcount()

            {

                        System.out.println("Actual Count: "+count);

            }

            protected void finalize()

            {

                        count--;

                        System.out.println("Dceremented count: "+count);

            }

}

class Mainemp

{

            public static void main(String args[])

            {                                             

                        Employee e=new Employee("JAVA","PROGRAM");

                        String h=e.getfirst();

                        String h1=e.getlast();

                        System.out.println(h+" "+h1);

                        e.getcount();

                        Employee e1=new Employee("JAVA1","PROGRAM1");

                        String h2=e1.getfirst();

                        String h3=e1.getlast();

                        System.out.println(h2+" "+h3);

                        e.getcount();

                        Employee e2=new Employee("JAVA2","PROGRAM2");

                        String h4=e2.getfirst();

                        String h5=e2.getlast();

                        System.out.println(h4+" "+h5);

                        e.getcount();

                        e=e1=e2=null;

                        System.gc();

            }

}

Output

JAVA PROGAM

Actual Count: 1

JAVA1 PROGAM1

Actual Count: 2

JAVA2 PROGAM2

Actual Count: 3

Dceremented count: 2

Dceremented count: 1

Dceremented count: 0