Java Proficiency: How to insert element in arraylist

Sunday 10 May 2015

we can insert element in arraylist at a given index.for this we use add(int index,element).

import java.util.ArrayList;

public class AddElement {

    public static void main(String[] args) {

        ArrayList<String> arr = new ArrayList<String>();

        // add element in arraylist

        arr.add("c");
        arr.add("php");
        arr.add("html");
        arr.add("java");
        arr.add("delhi");
        arr.add("INDIA");

        // print arraylist

        System.out.println("arrayList is = " + arr);

        /*
        * Inserts the specified element at the
        * specified position in this list
        * . Shifts the element currently at that position
        * (if any) and any subsequent elements to the right
        */

        arr.add(1,"javascript");

       // print arraylist

        System.out.println("after insert arrayList is = " + arr);

    }
}

Output:

arrayList is = [c, php, html, java, delhi, INDIA]

after insert arrayList is = [c, javascript, php, html, java, delhi, INDIA]

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