Program to implement final Keyword in Java

Program to implement final Keyword in Java

 This program is used to implement final variable. Final variable is constant variable which is unchanged. 

import java.io.*;
import java.util.*;
class increment
{
private int i;
private final int J;
increment()
{
J=2;  // final value

}
int add(int c)
{
int x=c+J;
return x;
}
}
class total
{
public static void main(String args[])
{
increment t=new increment();
int a=2;
System.out.println("Before invoking final value:"+a);
int b1=t.add(a);
System.out.println("After invoking final value:"+b1);
int b=t.add(b1);
System.out.println("After invoking final value:"+b);
}
}

Output

Before invoking final value:2
After invoking final value:4
After invoking final value:6