What is Compiler?
Compiler is a computer program that has the capacity to translate high-level language into a machine language/ low-level language that is readable to the computer. The high-level language is know as source while the low-level language is known as machine code.
Computers usually read instructions in machine language format written in binary. A binary is string of numbers made up of 0s and 1s. Computers can’t understand human readable languages and humans many not also understand computer language (machine). Therefore programmers work with the programming language the have understanding of, which can then be translated to the machine language which the computer can understand. Compilers do the job of translating high-level (human-readable) language machine (computer-readable) language.
Read also: Advantages and Disadvantages of Compilers
What is Java Compiler?
Java compiler is a compiler that can convert Java code to bytecode. In other words, Java compiler converts .java file to .class file
What is Online Java Compiler?
Online java compiler is therefore an online software tool
which can be used to compile and java programs. Online compilers help
programmers especially learners to easily compiler and run java programs from
anywhere. Before now programmers used to download Java IDEs to compile and run any
java program even for the simplest script such as “ HELLO WORLD.”
Best Online Java Compilers
There are many online Java compilers out there but we have
compiled the best online Java compilers for you.
- Jdoodle
- Codechef
- Repl
- Codiva.io
- OnlinedGdb
- Browxy
- JavaOnlineCompiler
- CompileJava
- Paiza.io
- Rextester
- OneCompiler
- Programiz
1 Jdoodle
Jdoodle is an online compiler tool that helps students to
learn programming language. It has the capability to be used compile and run
java program as well as C/C++, PHP, Python, Perl, HTML, Ruby etc. It provides
easy and quick platform to compile and execute few lines of code online for the
purpose of learning.
Features
- Supports many programming languages
- Support almost all Java libraries
- Platform support: Windows
Pricing: Free to use
2 Codechef
Codechef is an online Java programming tool that supports
several languages like Java, C, C++,J Python and much more. It has a lot of
tutorials got beginners and for the experienced programmers to improve on their
skills, and also teach.
Features
- Supports different languages
- Offers different levels of programming practice, ranging from beginner, armature, hard, expert, etc
- Offers community of programmers` collaboration and support
Platform Support
- Windows
- Works on both PC and mobile devices
Pricing: Free
Website: https://www.codechef.com/ide
3 Repl
Repl is an open-source online compiler, IDE, and interpreter
tool with capabilities of running
programs in more than 50 languages such as Java, Javacript, C, C++, Python, HTML
etc.
Features
- Interactive and Open-source
- Enables sharing of codes
Good for learning and teaching of programming languages
Platform Support
- Cloud-based
- Windows
Pricing: Free
Website: https://repl.it/languages/java10
4 Codiva.io
Codiva.io is a powerful online Java compiler. It is similar
to popular IDEs, it has the capabilities to that compilation of code as the
code is being typed. It shows the error during compilation and shows the result
once typing is completed for easy debugging. You can create files, packages,
folders using the platform.
Platform features
- Starts compiling the code as soon as you start typing
- Has powerful syntax highlighting feature
- Suggests keywords using autocomplete
- Allows sharing of code as an URL or a HTML snippet
Platform Support: Windows
Pricing: Free
5 OnlinedGdb
OnlinedGDB is an online compiler and debugger platform that
supports various programming languages such ass C/C++, Java, Python, C#, VB
etc. It has in-built gdb debugger. It is first online Java IDE that provides
debugging feature.
Features
- Supports various languages
- Enables command-line arguments
- Provides gdb debugger facility
Platform Support: windows
Pricing: Free
Website: onlinedgdb.com
6 Browxy
Browxy is a fast and simple online IDE that supports
multiple programming languages such as Java, PHP, C, C++, Python and others.
The following features may it a good online Java compiler:
It provides 3 views: Console View for I/O, Applet View,
and Log Vie to monitor or execute code
It offers features that enable users to either publish code
publically or privately
You can keep track of all your code in Browxy dashboard.
7 JavaOnlineCompiler
This is a simple online Java compiler with minimal design
and great functionalities.
Features
- Offers support for highlighting syntax of written code
- Has simple editor window to copy and paste code
- Supports command-line arguments
- Offers options to change theme
8 CompileJava
CompileJava is fast and easy to use online Java compiler. It
provides multiple themes that offer functionalities for easy coding. It also
provides Applet support including Jpanel. The only downside of CompileJava is
that it deletes submitted file after 5 minutes of execution, and does not store
them for further use, although this is to make room applets.
Features
- Offers multiple themes
- Supports Optional command-line arguments
- Provides Applet support, JPanel
Platform Support: Windows
Pricing: Free to use
Website: https://www.compilejava.net
9 Paiza.io
Paiza.io is another great online Java compiler with easy to
use user interface that support other languages too. It has many features and
functionalities.
Features
Supports multiple files
Has autocomplete feature
It supports integration with third-party applications such
as GitHub or Gist for code sharing
Allows multiple users to collaborate in real time
Enables task scheduling
10 Rextester
Initially developed as Regular Expression Tester and late
developed as online Java IDE, Rextester offers simple user interface and it is
used by millions of developers. Like most online Java IDE, Rextester also
supports multiple other programming languages.
Features
Input can be in Text Format
It offers multiple themes and option for change of theme
Supports both vertical and horizontal layouts
It supports saving and sharing the source code as URL
11 OneCompiler
OnCompiler is one of the robust, feature-rich online
compiler for Java language, running Java LTS version 11. With OneCompiler, you
can easily write, run and share Java code for free. OneCompiler Java editor shows sample
boilplate code when user chooses language as Java and start to code. It offers
features for Gradle for dependency
management. Although, when you add the dependencies for the first time, it
might be slow to run as you download the dependencies, but in your subsequent
runs it begins to run faster
Features
Supports Gradle for dependency management
It allows users to add dependencies on the build.gradle file
and use then in running programs.
Provide sample on how to configure the Gradle and how to add
dependencies
Platform Support
Windows
Pricing: Free
Website: https://onecompiler.com/java
12. Programiz
Website: https://www.programiz.com/java-programming/online-compiler/
Read also: Compiler: Definition,Structures, Types and Application