DIFFERENCES between Java vs Javascript  Which is better? ▷ 2020

Have you heard of Java and JavaScript? Would you say they are the same, that they could be? And it is that this discussion even occurs in meetings of people who are knowledgeable about the world of computing and programming, that is, those who are novices in the field.

Rather One would have to wonder how Java and JavaScript are alike because, beyond being languages ​​and being called “Java”, they have nothing else in common.

Even so, let’s see what each of them are, with its main characteristics Yof course a comparison to know their differences.

What is Java and what are its features?

what is Java

Java is a programming language general purpose initially intended for design applications in TV receivers and embedded devices, although now we find it behind everything. Its purpose is therefore general concurrent.

It was also intended that the writing of each program be done only once and then it could be run anywhere, without having to recompile the code over and over again. It is currently among the most popular programming languages, being used a lot, especially when it comes to develop client-server software.

Has a syntax derived largely from C and C ++, with few low-level units. The result of its use is a application that, compiled to bytecode, will run in any Java virtual machineregardless of the team architecture.

What is JavaScript and what is it for?

what is javascript

JavaScript is another programming language, in this case, interpreted and specific. It is born later and does it with the intention of enable greater interactivity on websites, which, to date, were too flat, unattractive for the user.

Commonly used on the client side, being implemented mainly in browsers (all currently support it) to improve the user interface and websites. Not surprisingly, there is also the server version. Its use is so widespread that it is undoubtedly the benchmark for this goal, being used to add interactivity in practically all sites.

Too integrates into diverse applications like other programming languages, operating systems or servers. Its syntax is quite similar to that of C, modifying names and conventions and adopting them also from others, including Java.

Is Java the same as Javascript? What differences are there?

Java vs Javascript

As we have already advanced to the beginning, no, Java and JavaScript are not the same. Both are languages ​​and the second “inspired” its name from the first to hang on to its fame, but nothing more. The truth is that there are many points in which they differ:

  • Language type:
    • JavaScript is interpreted. This means that the programs developed in this language make up text files that your computer and you can read, being integrated into the HTML pages and interpreted by the browser.
    • Java is compiled, that is, that information is gathered to create a special file that a computer can read and run.
  • Necessary resources:
    • JavaScript only requires a text editor for code and a browser where the results will be reflected.
    • Java needs a virtual machine and a development kit, which is made up of the tools that allow us to create programs and among which stand out “javac.ese”, which is the compiler, “java.exe”, the interpreter, and “javadoc.exe”, which is the one that generates the class documentation.
  • Debugging phases:
    • JavaScript has a single phase debugging. For this reason, errors are only detected with execution of the program (except if you use specific tools for it).
    • Java does the same in two times. This means that in a first phase of compilation we will be able to warn the errors without having to get to the execution of the software. If we have solved these, the execution errors that may appear will be of a logical type.
  • Type of objects:
    • JavaScript is based on prototypes. Thus, in most cases it is necessary to simulate several of the characteristics of certain programming languages. The positive point is that their paradigms, of various kinds (dynamic, imperative, functional and object-oriented), make it a highly versatile tool. Objects, generalized, duplicate and extend, property sharers and methods.
    • JavaScript has a purely object-oriented imperative paradigm. Defined classes are going to invoke objects.
  • Typing or conversion of data from one type to another:
    • Javascript is weak in this regard. The variables are capable of having data being modified in type over and over again. It is flexible but favors error.
    • Java is very strong. Each of the variables has a default type; when they are defined they cannot be modified.
  • Ambit:
    • Java has a scope per block. Each variable leaves its block until it is defined, ceasing to be a class or instance. Defined variables cannot be modified.
    • The one for JavaScript is by function. The variable will be accessed within the declared function.
  • Encapsulation of objects: It is about the way of enclosing the elements (methods or attributes) of an object so that they can only be consulted when they are called, so that you are allowed to decide which ones you have, or not, access to.
    • JavaScript does not include it.
    • Java does and it is highly effective.
  • Namespace Presence: It is an address that tells you where each class is.
    • JavaScript it does not have namespaces.
    • Java use this method of work.
  • Multi thread:
    • Characteristic not supported by JavaScript and there is no forecast.
    • Multithreading allows us to running multiple programs simultaneously in Java.
  • Support:
    • JavaScript is unique to your use and deployment in desktop applications and browsers.
    • Java works in both browsers and virtual machines all types.
  • Closings: They are a creation given from the declaration of a function within a variable.
    • JavaScript has always worked with closures, which are one of the most characteristic aspects of this.
    • Java has incorporated them very recently, in its version 8 at an incomparable level.
  • Multi-argument:
    • JavaScript has the multi-argument as an intrinsic feature of all its functions.
    • In java it is necessary to indicate this to configure functions with that feature.
  • Standardization:
    • JavaScript is a standard language by ECMA-262.
    • Java is not, belongs to a private company that you will modify it at will at any time you want.
  • Disk writing:
    • JavaScript can’t do it, something that makes the user more secure, to the point of being considered a safe language for use on the network.
    • Java is capable of perform file management.
  • Other features:
    • JavaScript is less comprehensive, which of course makes it lighter, more agile, and easier.
    • Java is more robust, capable, heavy, complicated and complete.
  • Development: Although to know what Java and JavaScript are and how they work, this point is absolutely unnecessary, it should also be mentioned that they are not developed by the same corporation, far from it.
    • Java is a Sun Microsystem product released in 1991.
    • JavaScript was developed by Netscape in 1995.

The conclusion we can give from all the above is that their only similarity is that both are languages ​​designed to develop software elements. Otherwise, they neither work the same nor in the same way nor with the same purpose.

If you have any questions, leave them in the comments, we will answer you as soon as possible, and it will surely be of great help to more members of the community. Thank you! 😉

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