Java vs JavaScript | What's The Difference? Which Is Better?

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Java vs Java Script | What's The Difference?

First we have to understand what each of these terms means.

What Is Java?
Java is an OOP (Object-Oriented Programming) language. It is also alternatively known as ‘scripting language’ and is a multi-platform and network-centric programming language. Java is also used as a computing platform. Released by Sun Microsystem in 1995, Java soon became the most used programming language across the world. It was later acquired by Oracle.

What Is JavaScript?
JavaScript is a lightweight programming language, also known as an ‘object-based scripting language.’ JavaScript can insert dynamic text into HTML. Alternatively known as the browser’s language, it infuses life into web pages and makes them more interactive. It was, in fact, the first language integrated fully inside internet browsers such as Internet Explorer, Google Chrome, and Mozilla Firefox.

What Are The Differences Between Java and JavaScript?
  - Type of Language
One of the main differences between Java and JavaScript is that Java is a compiled language, while the latter is an interpreted language. In compiled languages, the source code has to be compiled before the program is distributed to end-users for final execution. Java uses a two-step compilation process to convert the source code into a simplified form, which can be processed by the computer.

JavaScript, an interpreted language, can be directly executed by the interpreter in real-time. The only condition is that the interpreter needs to be accessible in the execution environment. Developers prefer interpreted languages as they are easy to work with. This is because they are flexible and have lesser restrictions.

  - File Extension
The java program has a file extension of .java. It translates the source code into bytecodes, and this translation is executed by the Java Virtual Machine (JVM). On the other hand, JavaScript has the file extension .js. Every browser has a JavaScript interpreter to execute the JavaScript code, as JS is interpreted and not compiled.

  - Nature of Typing
Java is more statically typed, while JavaScript is more dynamic. The former requires you to declare the data types of the variables before using them in any program. Only after declaration along with type-specification can the variables be used in the program. While the static format may seem tedious, it is actually a lot better than dynamic typing. In addition, it helps to prevent mismatch of data type exceptions during runtime.

Dynamically typed languages are more flexible and allow you to create variables without specifying their data type. The JavaScript engine itself will pick the variable type based on the value assigned at runtime. You are also free to assign different data types to the same variable as you continue creating the program – JavaScript will accept all of it without any hassles.

  - Memory Usage
The Java program uses more memory. On the other hand, JavaScript functions on lesser memory, which is also why it is used in web pages.

+ 3 more discussed in video from Threading Category, Flexibility, and Debugging Process

Java or JavaScript, Which One is Better?
When it comes to popularity, JavaScript hands down wins over Java. As JavaScript is a lot more flexible, it is ranked at the top as the most commonly used and loved programming language. Interestingly, though both these languages are starkly different, you can still achieve a similar outcome with both languages.

If you don’t want to maintain multiple code bases for Android and iOS for developing mobile applications, JavaScript is a much better alternative. But if you are developing a native Android app, then you need to work with Java only. For developing cross-platform Desktop GUI apps, you can use either Java or JavaScript; the result won’t matter.

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