Differences between Java and JavaScript

Java and JavaScript have always caused confusion amongst novice web developers. Despites similarities in their names, they are totally different from each other and they serve their own purposes in web development. JavaScript can be considered as a cross-platform scripting language that allows developers to write scripts directly in their web pages that is then interpreted on the user’s browser. These scripts usually enhance web pages by providing support for form validation, image animations and other dynamic controls.
Java on the other hand is a programming language similar to C++. It has long been used as a desktop only language, but within the past years, it has paved its way on the World Wide Web through Java applets or Java Server Page (JSP). Java is designed to run from within a web page. In this way, it differs from JavaScript which are text commands typed into the HTML page itself.

As a developer, it’s important for you to understand the distinction between the two. Let’s consider a simple ‘painting’ analogy.

Java vs. JavaScript and Paintings

The difference between Java and JavaScript is sort of like the difference between a painting that you hang on your wall and painting on the wall itself. When you create a painting and put it in a frame, you can hang it on any wall in your house with no problem. You can make it a big painting or a small painting; a tall one or a wide one. As long as you have a place to put it, you can hang any kind of painting. However if you want to make any changes to your painting, you’ll have to take it off the wall, take it out of the frame, make your changes, put it back in the frame and re-hang it. When you paint right on the wall, though, you can’t move your painting and you are limited to the constraints of the wall. For instance, if you want to make changes, you can just splash more paint right over where you have painted before with no problem.

Java “Painting” vs. JavaScript “Painting”

Java is like the painting you hang on your wall. Java is a standalone programming language, allowing you to create programs and applets that you can put anywhere. In order to make changes to a Java program, though, you need to “recompile” it because Java is written in machine language and then compiled into a language that the HTML document housing it can read. JavaScript is like painting directly on the wall. The wall in this case is the HTML document. When you write a JavaScript program, you are putting code directly into the HTML document. You can make changes easily since all you have to do is rewrite some of the code in the document, but your program is limited to the constraints of the HTML document itself.

Learning Java and JavaScript

Just as more people know how to paint a wall than an artistic painting, learning JavaScript is easier than learning Java because all you need is a basic understanding of HTML code. Both languages, however, have their uses, and once you’ve learned JavaScript, you may wish to learn Java as well.

This article was written by Web Hosting Search, a web hosting companies review site featuring companies that offer Java web hosting packages.

One Comment

  1. Good description, but I have still confused with "JScript" do you know what is it? what's differ with "JavaScript" ?