final.java

class FinalDemo {

 // Final variable (constant)
 public static final double PI = 3.14159;

 // Final method (cannot be overridden)
 public final void showInfo() {
 System.out.println("PI value: " + PI);
 }
}

class FinalChild extends FinalDemo {
 // Can't override showInfo() because it's final
 // public void showInfo() { ... }
}

public class final{
 public static void main(String[] args) {
 FinalDemo obj = new FinalDemo();
 obj.showInfo();
 }
}