Have you heard of Java and JavaScript? Would you say that 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, yes, those who are new to the subject.
Rather one would have to wonder how Java and JavaScript are similar because, apart from being languages and being called “Java”, they have nothing else in common.
Even so, Let’s see what each of them arewith its main characteristics Yof course, a comparison to know their differences.
What is Java and what are its features?
Java is a programming language general purpose originally intended for design applications on TV receivers and embedded devices, although now we find it behind everything. Its purpose is, therefore, concurrent general.
It was also intended that each program be written 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 widely used, 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 on any Java virtual machineregardless of how the equipment architecture is.
What is JavaScript and what is it for?
JavaScript is another programming language, in this case, interpreted and specific. She is born later and she does it with the intention of enable greater interactivity on websiteswhich, to date, were too flat, unattractive to 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 goalbeing used to add interactivity in practically all the sites.
Also integrates into various applications such as other programming languages, operating systems or servers. Its syntax is quite similar to that of C.modifying names and conventions and also adopting them from others, including Java.
Is Java the same as Javascript? What differences are there?
As we have already anticipated at the beginning, no, Java and JavaScript are not the same. Both are languages and the second “inspired” his name from the first to hang on to his 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 yourself can readbeing integrated into HTML pages and interpreted by the browser.
- java is compiledthat is, that information is put together to create a special file that can be read and executed by a computer.
- Necessary resources:
- JavaScript requires only a text editor for the code and a browser where the results will be displayed.
- Java needs a virtual machine and a development kitwhich 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 Generate class documentation.
- Debugging phases:
- JavaScript has a single stage purification. 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 notice the errors without the need 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 your paradigms of various kinds (dynamic, imperative, functional and object-oriented), make it a highly versatile tool. Objects, generalized, are duplicated and extended, sharers of properties and methods.
- JavaScript has a purely object-oriented imperative paradigm. The defined classes will invoke objects.
- Typing or conversion of data from one type to another:
- Javascript is weak in this regard. The variables are trained to have data that is 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 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 inside the declared function.
- Object encapsulation: This is a way of enclosing the elements (methods or attributes) of an object so that they can only be queried when they are called, so that you are allowed to decide which ones are accessed or not accessed.
- JavaScript does not include it.
- Java does and it is highly efficient.
- 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 either.
- Multithreading allows us to perform the running multiple programs simultaneously in Java.
- Support:
- JavaScript is unique to your usage and deployment in desktop applications and browsers.
- java works both in browsers and virtual machines all types.
- Closures: They are a creation given from the declaration of a function within a variable.
- javascript has always worked with closureswhich are one of the most characteristic aspects of this.
- Java has incorporated them very recentlyin 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 the 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 the time you want it.
- Disk Write:
- javascript can’t do itsomething that makes the user more secure, to the point of being considered a safe language for use on the Internet.
- Java is capable of perform file management.
- Other features:
- JavaScript is less complete, which of course makes it lighter, snappier, and easier.
- Java is more robust, capable, heavy, complicated and complete.
- Developing: Although this point is absolutely unnecessary to know what Java and JavaScript are and how they work, it should also be mentioned that they are not developed by the same corporation, far from it.
- Java is a product of Sun Microsystem released in the year 1991.
- JavaScript was developed by Netscape in 1995.
The conclusion that we can give from all of the above is that their only similarity is that both are languages designed to develop software elements. Otherwise, They do not work in the same way or in the same way or for the same purpose..
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