ArrayList Example in Java - How to use ArrayList in Java Program

ArrayList Example in Java. This Java ArrayList example describes the basic operations performed on the ArrayList in Collection Framework.

Program:

import java.util.*;

public class ArrayListDemo {

/**

* @param args

public static void main(String[] args) {

ArrayList al = new ArrayList();

al.add(“1”);

al.add(“2”);

al.add(“3”);

System.out.println(“ArrayList size: “+al.size());

System.out.println(“ArrayList: “+al);

al.add(“4”);

al.add(4, “5”);

System.out.println(“Size after addition : ” + al.size());

al.remove(3);

al.remove(“5”);

System.out.println(“Size after removal : ” + al.size());

System.out.println(“ArrayList: “+al);

for(int i=0;i<al.size();i++)

System.out.println(“ArrayList-element[“+i+”]:”+al.get(i));

}

Result:

ArrayList size: 3

ArrayList: [1, 2, 3]

Size after addition : 5

Size after removal : 3

ArrayList: [1, 2, 3]

ArrayList-element[0]:1

ArrayList-element[1]:2

ArrayList-element[2]:3

ArrayList Example in Java – How to use ArrayList in Java Program