Common ArrayList Collection methods in Java

 An ArrayList in Java is a dynamic and resizable array declared in java.util package. Unlike standard array whose size is fixed, the ArrayList contents can dynamically grow and shrink. Following is a simple example which includes common Arraylist methods:

import java.util.ArrayList;

import java.util.Iterator;

public class CommonCollectionAPIsTest {

public static void main(String[] args) {

ArrayList<Integer> al = new ArrayList();

al.add(11);

al.add(22);

System.out.println("Value at index 0 " + al.get(0));

System.out.println("Array list size: " + al.size());

System.out.println("Array list is empty: " + al.isEmpty());

Iterator<Integer> iterator = al.iterator();

System.out.println("Iterator values:");

while(iterator.hasNext()) {

System.out.println(iterator.next());

}

al.remove(0);

System.out.println(al);

}

}