Java file extension, while javascript uses a. Though it might seem obvious, you don't want to spend hours wondering why your scripts or programs are not running, only to find that you've saved them with the wrong file extension. Javascript, with its simplicity, can be run in lightweight applications like a browser. Because of its complexity, Java can be run independently across multiple platforms and hardware. These differences play into their strengths both were designed intentionally for those reasons. This helps to ensure a uniform browsing experience across geographical areas with different internet connection speeds. This allows the browser to execute the embedded scripts efficiently without too much strain on the user's internet connection. As a scripting language that relies on a browser for execution, JavaScript was designed to be simple and lightweight. Ease of LearningĪlthough Java is a more complex language than JavaScript, it is relatively easy to learn. With a much simpler syntax, it can produce the same results as a more complex programming language like Java but relies on an interpreter, i.e. On the other hand, Javascript was designed to be lightweight but has sacrificed its independence to achieve that. This is necessary to maintain its ability to run independently of other programs. ComplexityĪs you can tell from the code snippets, Java is a more robust and complex language. This is one of the significant differences between both computer languages. Javascript, however, needs an interpreter to run and has to be embedded in the HTML of a browser. You could run a Java program in your smart fridge. In contrast, the Java program can be compiled within a virtual environment, allowing it to be run on almost any machine independently of any other programs. While both programs output the words "hello world," you can only run the Javascript code through a browser. Java program to print "Hello World" class xyz Let's take a simple program to display Hello World in both Java and Javascript: It is perhaps easier to highlight the difference by looking at some sample code. It was designed to work alongside CSS and HTML to achieve greater interactivity in the web browser experience. Javascript was designed as a scripting language to be relatively simple and lightweight. You don't have to specify the type of data assigned to a variable because these can be changed or reassigned later. Dynamically typed means any language with a more flexible syntax. On the other hand, JavaScript is a dynamically typed object-oriented scripting language that does not need to be set up or installed, unlike Java, because it runs within a computer's browser. This is a significant difference in both languages, as we will discover when we discuss JavaScript. Once declared, you won't be able to change this. What do we mean when we say statically typed? A statically-typed language is one coded with a rigid syntax, meaning when you define a variable, you have to specify from the outset what kind of data it will be assigned. can be run on any device since it can be executed within a simulated virtual environment.) Its ability to run on a virtual machine (Java virtual machine) makes it platform-independent (i.e. Java is a statically typed object-based programming language. But that history is where all similarity ends between the two languages.īut what is Java? And what is JavaScript? In exchange, Sun asked for the JavaScript language (then called Mocha) to be changed to JavaScript. This would have allowed them to run Java programs within the Netscape browser. To compete with internet explorer during the browser wars, Netscape asked to license the java protocol from Sun Microsystems. On the other hand, Javascript is a dynamically-defined object-oriented scripting language that a company called Netscape developed to bring more interactivity to web applications. Initially developed for television, Java would eventually pivot to become popular in server-side applications. Java is a statically-defined object-based language developed by Sun Microsystems and released in 1995. To be fair, both languages share a bit of a tangled history. But not to worry, we’re here to explain both of them and to draw your attention to their similarities and differences. That is the case with Java and Javascript, two computer languages that are often confused with each other, especially for those newly getting into programming. It is even more so when two languages share the same name or at least parts of it. There are so many computer languages in use today that it is easy to confuse them. Technology moves fast and is constantly evolving.
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