Rahul Sharma has Published 65 Answers

Find the dimensions of 2D array in Java

Rahul Sharma
Rahul Sharma
Published on 06-Feb-2018 14:58:05
Following example helps to determine the upper bound of a two dimensional array with the use of arrayname.length.https://www.tutorialspoint.com/javaexamples/arrays_upperbound.htm

How to empty an array in Java

Rahul Sharma
Rahul Sharma
Published on 06-Feb-2018 14:46:16
Use List.clear() method to empty an array.Exampleimport java.util.ArrayList; import java.util.List; public class Tester {    public static void main(String[] args) {       List<String> list = new ArrayList<>();       list.add("A");       list.add("B");       list.add("C");       list.add("D");       list.add("E");   ... Read More

How to convert a byte array to hex string in Java?

Rahul Sharma
Rahul Sharma
Published on 06-Feb-2018 13:38:17
Use Integer.toString(int, redix) where int is byte to be converted and redix is 16 for hexadecimal format.

How to convert an Array to a Set in Java?

Rahul Sharma
Rahul Sharma
Published on 06-Feb-2018 11:23:29
Following program is converting an Integer[] to Set<Integer>:ExampleLive Demoimport java.util.Arrays; import java.util.HashSet; import java.util.Set; public class Tester {    public static void main(String[] args) {       Integer[] numbers = {1, 2, 3, 4, 5};       Set<Integer> set = new HashSet<Integer>(Arrays.asList(numbers));       System.out.println(set);   ... Read More

How do I declare and initialize an array in Java?

Rahul Sharma
Rahul Sharma
Published on 05-Feb-2018 14:46:43
Following example shows how to create and initialize an array in a single statement.public class Tester {    public static void main(String[] args) {       int[] dataArray = {1, 2, 3, 4};       for(int i: dataArray){          System.out.println(i);       }   ... Read More

What is final parameter in Java

Rahul Sharma
Rahul Sharma
Published on 02-Feb-2018 14:26:47
A final parameter is a final variable. Once passed it cannot be modified. A reference variable declared final can never be reassigned to refer to an different object.However, the data within the object can be changed. So, the state of the object can be changed but not the reference.This is ... Read More

Is there a way to print all methods of an object in JavaScript?

Rahul Sharma
Rahul Sharma
Published on 01-Feb-2018 15:07:10
To get all the method, use Object.getOwnPropertyNames(). This returs all properties that belong to an object.ExampleYou can try to run the following code to get all methods −Live Demo<!DOCTYPE html> <html>    <body>       <script>          document.write("<br>"+Object.getOwnPropertyNames(Math).filter(function (p) {             ... Read More

How to format a JavaScript date?

Rahul Sharma
Rahul Sharma
Published on 01-Feb-2018 14:38:13
JavaScript date follows the formatting formats −Date TypeFormatISO Date"2017-11-29" (The International Standard)Short Date"11/29/2017"Long Date"29 Nov 2017"Full Date"Wednesday November 29 2017"ExampleHere’s how you can display current date −Live Demo<!DOCTYPE html> <html>    <body>       <p>Click below to get the current date:</p>       <button onclick="display()">Display Date</button>     ... Read More

How to include an external JavaScript inside an HTML page?

Rahul Sharma
Rahul Sharma
Published on 22-Jan-2018 11:38:44
The HTML <script> tag is used for declaring a script within your HTML document. Through this, you can define client-side JavaScript. But, what if you want to add external JavaScript inside an HTML Page? Well, you can easily do that too using the src attribute of the <script> tag.The following ... Read More

What are the different <meta> tags to define special meta information in HTML page?

Rahul Sharma
Rahul Sharma
Published on 22-Jan-2018 11:02:53
The <meta> tag is used to define metadata within HTML document like information, keywords, author, etc. With HTML5, you can set viewport with the <meta> tag.Here are the different ways to add meta information and use the <meta> tag −AuthorUse the following to add the author of the web page.<meta ... Read More
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