ankur-anand

In the terminology of programming languages, first-class Objects are instances of a type
that can be assigned to an identifier, passed as a parameter, or returned by a function
In Python classes and functions are also treated as first-class Objects.

For Example
scream = print 
# assign name 'scream' alias name to print

Modules are also first-class objects in Python

ankur-anand

import java.util.ArrayList;
import java.util.Scanner;
class TestClass {
    public static void main(String args[] ) throws Exception {
        Scanner keyboard=new Scanner(System.in);
		int t=keyboard.nextInt();
		keyboard.nextLine();
		ArrayList<String> vowelList= new ArrayList<>();
		vowelList.add("a");
		vowelList.add("e");