A compiler is a type of software that is used to convert source code written in a programming language, such as Java, into machine code that can be executed on a computer. When Java code is written, it is typically written in a text file with the file extension ".java". This code is then passed through a Java Compiler, which converts the code into bytecode, which can be run on the Java Virtual Machine (JVM).
The Oracle JDK is the official and proprietary Java Development Kit from Oracle, while the OpenJDK is an open-source implementation of the JDK. Both of these compilers are widely used and well-supported and offer similar functionality for compiling Java code. Additionally, Eclipse, IntelliJ IDEA, and NetBeans are popular choices for IDEs that work well with Java and can easily be integrated with these compilers.
Here are a few popular compilers for Java:
- Oracle JDK (Java Development Kit)
- OpenJDK
- IBM JDK
- Azul Systems Zing JDK
- Apache Harmony
- GCJ (GNU Compiler for Java)
- Eclipse OpenJ9
- GraalVM
- Excelsior JET
- JetBrains JDK
- Oracle JRockit JDK
Please note that this list is not exhaustive and there might be other compilers for Java which are not included in the list.
- Oracle JDK
Oracle JDK (Java Development Kit) is a proprietary, commercial implementation of the Java SE (Standard Edition) Platform, which is used to develop, run, and deploy Java applications. It is developed and maintained by Oracle Corporation and is the official Java SE Development Kit. The Oracle JDK includes the Java Runtime Environment (JRE), as well as development tools such as the Java compiler (javac), the Java Virtual Machine (JVM), and the Java Class Library.
The Oracle JDK is widely used in enterprise environments and is the reference implementation of the Java platform. It contains a variety of tools and libraries for developing, testing, and deploying Java applications, including the Java compiler, the Java Virtual Machine, and the Java Class Library. It also includes documentation and sample code to help developers get started with Java development.
Oracle JDK is available for Windows, Linux, and macOS. It is a commercial product and requires a commercial license if you are using it in a production environment. The Oracle JDK is also the base for the OpenJDK, an open-source Java Development Kit, which is also widely used.
- OpenJDK
OpenJDK (Open Java Development Kit) is an open-source implementation of the Java SE (Standard Edition) Platform. It is an open-source version of the Oracle JDK and is developed and maintained by a community of developers under the guidance of the Java Community Process (JCP).
The OpenJDK includes the Java Runtime Environment (JRE), as well as development tools such as the Java compiler (javac), the Java Virtual Machine (JVM), and the Java Class Library. OpenJDK is similar to Oracle JDK in terms of functionality and can be used to develop, run, and deploy Java applications.
One of the main benefits of using OpenJDK is that it is available under the GNU General Public License (GPL) version 2 with the Classpath Exception, which means that it is free to use, distribute, and modify. It is also platform-independent and can be run on a variety of operating systems, including Windows, Linux, and macOS.
OpenJDK is widely used in a variety of settings, including enterprise environments, and is included in many Linux distributions as the default Java implementation. It also has the support of major companies such as Red Hat, Amazon, and IBM.
Keep in mind that OpenJDK is not maintained by Oracle and Oracle JDK has some additional features and tools, which are not available in OpenJDK.
- IBM JDK
IBM JDK (IBM Java Development Kit) is an implementation of the Java SE (Standard Edition) Platform developed and maintained by IBM. It is based on the OpenJDK and is compliant with the Java SE standard.
The IBM JDK includes the Java Runtime Environment (JRE), as well as development tools such as the Java compiler (javac), the Java Virtual Machine (JVM), and the Java Class Library. It also includes additional features, tools, and performance enhancements that are not available in the OpenJDK.
One of the main benefits of using IBM JDK is that it is optimized for IBM hardware, such as IBM Power Systems, and can provide better performance and scalability on these systems compared to other JDKs. IBM JDK is also fully supported by IBM and provides access to IBM support and service.
IBM JDK is available for Windows, Linux, and AIX and is a commercial product, which requires a commercial license if you are using it in a production environment.
It is also important to note that IBM JDK is not as widely used as Oracle JDK or OpenJDK and is mostly used by IBM Power Systems and IBM Z systems customers.
- Azul Systems Zing JDK
Azul Systems Zing JDK (Java Development Kit) is a proprietary, commercial implementation of the Java SE (Standard Edition) Platform developed and maintained by Azul Systems. It is based on the OpenJDK and is compliant with the Java SE standard.
The Azul Systems Zing JDK includes the Java Runtime Environment (JRE), as well as development tools such as the Java compiler (javac), the Java Virtual Machine (JVM), and the Java Class Library. It also includes additional features and performance enhancements that are not available in the OpenJDK.
One of the main benefits of using Azul Systems Zing JDK is that it is optimized for high-performance and low-latency applications, and it addresses the Java Garbage Collection (GC) pause time issues. It includes several GC algorithms like C4 and Falcon which are designed to minimize GC pause times and increase the overall performance of Java applications.
Azul Systems Zing JDK is also equipped with a feature called Zing Elastic Memory, which enables applications to dynamically adjust memory usage based on real-time workloads, and also improve heap utilization.
Online javascript compiler are a general-purpose programming language that is class-based, object-oriented, and designed to have as few implementation dependencies as possible. These compilers are used to convert Java source code into bytecode, which can then be executed on a computer using the JVM. Some of them are proprietary and some of them are open-source. Some of them are specialized for specific platforms or architecture. Some of them are integrated into IDEs.
Azul Systems Zing JDK is available for Linux and Windows and is a commercial product, which requires a commercial license if you are using it in a production environment. It is mostly used by companies and organizations that run high-performance and latency-sensitive Java applications and looking for a solution to minimize GC pause times.
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