package in.bench.resources.java.collections;

import java.util.ArrayList;

public class DeleteAndDeleteAllElementsOfArrayList {

	public static void main(String[] args) {

		// creating ArrayList object of type String
		ArrayList<String> al = new ArrayList<String>();

		// adding elements to ArrayList object
		al.add("Sundar Pichai");
		al.add("Satya Nadella");
		al.add("Shiv Nadar");
		al.add("Shantanu Narayen");
		al.add("Sundar Pichai"); // duplicate object
		al.add("Francisco D’Souza");
		al.add(null); // null is allowed

		System.out.println("Intial size of an ArrayList is : "
				+ al.size());

		// Iterating using for-loop
		System.out.println("\nIterating "
				+ "ArrayList elements using for-loop\n");
		for(int index = 0; index < al.size(); index++) {
			System.out.println(al.get(index));
		}

		// deleting particular element
		al.remove("Shiv Nadar");

		System.out.println("\n\nArrayList size after deleting : "
				+ al.size());

		// Iterating using enhanced for-loop
		System.out.println("\nIterating "
				+ "after deleting particular object\n");
		for(String str : al) {
			System.out.println(str);
		}

		// deleting all elements
		al.clear();

		System.out.println("\n\nArrayList size after clearing : "
				+ al.size());

		// Iterating using enhanced for-loop
		System.out.println("\nIterating after clearing ArrayList\n"
				+ al);
	}
}

Intial size of an ArrayList is : 7

Iterating ArrayList elements using for-loop

Sundar Pichai
Satya Nadella
Shiv Nadar
Shantanu Narayen
Sundar Pichai
Francisco D’Souza
null

ArrayList size after deleting : 6

Iterating after deleting particular object

Sundar Pichai
Satya Nadella
Shantanu Narayen
Sundar Pichai
Francisco D’Souza
null

ArrayList size after clearing : 0

Iterating after clearing ArrayList
[]