Reification

class Demonstration {
    public static void main( String args[] ) {
        Integer[] array = new Integer[10];
        Number[] refToArray = array;
        // Attempt to store a Double in an array of Integers
        // throws ArrayStoreException
        refToArray[0] = new Double(5);
    }
}

import java.util.*;
class Demonstration<T> {
    public static void main( String args[] ) {
        Integer[] arr = new Integer[10];
        System.out.println(arr instanceof Integer[]);
        List<Integer> list = new ArrayList<>();
        System.out.println(list instanceof List);
        // list instanceof List<Integer> <--- compile time error
    }
    void testInstanceOf(Object o){
        // instance of test with the generic type  parameter
        // System.out.println(o instanceof T);  // <--- compile time error
    }
}