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How Does Java Online Compiler Work?

by Nathan Zachary

Ever wondered why Java as a coding language is so popular? If yes, this blog will enlighten you about the Java language and the best online compiler for your coding. Java is an extensively used object-oriented programming language that runs on a gazillion devices, including smartphones, gaming systems, notebook computers, and many more. 

What is fascinating is that even after so many years of existence, Java is still predominating in the market for software development. Most tech professionals still choose Java over other program languages like C++, Python, etc. 

This is great for those pursuing their degree in computer science, as they can focus more on Java than other languages. Do you know how the Java program gets recognized by a computer? Let’s find out!

What Is an Online Java Compiler?

A Java compiler is like any other compiler which translates complex programming to its own form to process the command further. With a Java compiler, you can write, edit, run and view the results in your browsers. 

In other words, we can say that a compiler is a program that converts the source code into object code. Without the compilation process, software development will be questionable. It is a part of the Integrated Development Environment (IDE) with the interpreter. The IDE consists of the features like editing, debugging, data modeling, unit testing, etc., which collectively formulate the final program. 

Java Online Compiler Process

When a Java Programmer finishes their script, they need to compile it into bytecode, which is used by JVM (Java Virtual Machine) at the runtime. This is where the online compiler comes to the rescue. The Java source code is transformed into bytecode using a Compiler, and the bytecode then gets saved on the disk with the file extension. At the runtime, bytecode gets converted to machine code. 

If we deconstruct the process step by step, the following is the order of the compilation process:

  • Writing the Java Code: This is the first and the most crucial step of the process. It includes writing the program code.
  • Compiling the Java Code: As discussed earlier, you need to convert the Script code into bytecode to transfer the file to where it will run. This is done using a Java Compiler, many of which are available online for programming procedures. 
  • Create the .h file: This is used to create the header file that gives the function a definition for proper implementation.
  • Write the method implementation: The implementation method is written in the source file that gives a regular function.
  • Create a shared library: In this step, we compile the files made in the third and fourth steps into a shared library.
  • Run the program: Finally, run the program using the Java interpreter.

It’s challenging to specify all the advantages of the Java programming language and online compiler, as there are many. Despite the tech world continuing to grow at lightning speed, tech professionals opt to use Java repeatedly due to its excellent outcomes. 

You have another advantage if you are well-versed in the Java programming language, as it helps you get hired actively. You will also have high demand in the tech market for your impeccable programming expertise. 

Compiling the source code into bytecode is imperative as it has many advantages. It reduces the file size as the bytecode is much smaller in size than the source code. It’s also hard to reverse engineer. It is also harder to modify the bytecode than the source code, thus improving security.

The most important benefit is that you can run it anywhere without needing a compiler in the JVM. The compiling process takes less time, and memory comes in handy when running the program.

Top Online Java Compilers

The next thing which comes to your mind is, are these compilers available online? The good news is that a plethora of Compilers are available on the internet. For your convenience, we have listed the best ones below:

It is an online tool for compiling various programming languages, including Java and C++. It works with Microsoft operating system, and the best part is that it also works as a debugger.

  • Eclipse

This compilation tool is one of the most widely used tools on the platform. It is a cross-platform compiler and works on operating systems like windows, Linux, Mac, etc. It is open-sourced and highly accessible and thus stands apart from the support of many programming languages.

  • Android Studio

It is the official tool for the Android operating system, and hence can be used on an android phone as well. Its feature-rich environment makes it a powerful compiler for working on Android-based applications.

  • Java C

Made and maintained by the Oracle technology network, it is a Compiler tool you can trust. It can work on commands of any length and any operating system due to its stable environment.

  • Compiler (Java)

This comes from the folks at the interview bit. Though it seems bare-bones by looks, it can easily get the job done. And it can be used on any platform.

A stand-out feature of all these compiler tools that deserves special mention is that all of them are free. Thus, compiling a Java script becomes a cakewalk with these Java Compiler tools.


Based on this expertise, you can also be hired by big tech companies like Apple and Microsoft to brilliantly program for a smartphone, laptop, PC, etc. Today, in this modern world, everyone has an android or IOS phone based on Java programming. 

It is also possible to develop any application or game for these smartphones using Java, which caters to the demand of the general public. To know more about online compilers, be sure to collaborate with experts.

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