Differences between Java final and instanceof keywords

Final applicable scope:
Modifier: a class that USES this modifier cannot be inherited

Modifier: a modifier cannot be overridden

Modified properties:
1. Final modifies a member variable as a constant, and the value cannot be changed
          In Java, constants are capitalized

When a parameter final modifies a primitive type variable, it cannot be modified ina function
    Reference type variable: the address cannot be changed

class A
{

}
class B extends A
{
    //test
    public void eat(){
        System.out.println(" Cannot override methods of a parent class ");
    }

    static final double PI=3.1415926;

    public void test( final int x,int y){
        //X = 12;   You can't change that
        y=33;
        System.out.println("x="+x+"y="+y);
    }
    public void test( final int[] x){
        //Represents the address of the passed array & PI; You can change the values inside
        x[0]=1;
        //Wrong here too!! X = new int [] {23};
        System.out.println(x[1]);
    }
} 
class Demo4
{
    public static void main(String[] args)
    {
        new B().test(2,3);
        new B().test(new int[]{20,3});

        A a =new A();
        B b=new B();
        System.out.println("a  Whether it is B Object (instance) of  ");
        System.out.println("instanceof "+(a instanceof A));
        System.out.println("instanceof "+(a instanceof B));
        System.out.println("instanceof "+(b instanceof B));
        System.out.println("instanceof "+(b instanceof A));
        System.out.println("final");
    }

}