Java Proficiency: How to replace element in ArrayList

Sunday 10 May 2015

We can replace any specific index element by other element using set(int index,element) method.

import java.util.ArrayList;
public class ReplaceElement {

    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("before replace arrayList is = " + arr);

        /*
        * Replaces the element at the specified
        * position in this list with the specified element.
        */

        arr.set(2,"Mysql");

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

    }

}

Output:

before replace arrayList is = [c, php, html, java, delhi, india]

after replace arrayList is = [c, php, Mysql, java, delhi, india]

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