The Java Development Kit (JDK) is one of the three main technology packages used in Java programming, together with the JVM (Java Virtual Machine) and the JRE (Java Runtime Environment). It is important to differentiate these three technologies, as well as to understand how they are connected:
• The JVM is the component of the Java platform that runs programs.
• The JRE is the part of the Java disk that creates the JVM.
• The JDK allows developers to create Java programs that can be executed and executed by JVM and JRE.
Beginning Java developers often confuse the Java Development Kit and the Java Runtime Environment. The distinction is that the JDK is a toolkit for Java-based software development, while the JRE is a suite of tools for executing Java code.
The JRE can be used as a separate component to run Java programs, but it is also part of the JDK. The JDK requires a JRE because running Java programs is part of their development.
• Technical definition: The JDK is an implementation of the Java platform specification, including the compiler and the class libraries.
• Definition of every day: JDK is a software package that downloads to create Java-based applications.
Start with the JDK
Obtaining Java configuration in your development environment is as easy as downloading a JDK and adding it to your classpath. When you download your JDK, you will need to select the Java version you want to use. Java 8 is the most commonly used version, but, so far, Java 10 is the most recent version. Java maintains compatibility with previous versions, so we will download the latest version.
JDK packages
In addition to choosing your version of Java, you will also have to select a Java package. The packages are Java development kits that are directed to different types of development. The available packages are Java Enterprise Edition (Java EE), Java Standard Edition (Java SE) and Java Mobile Edition (Java ME).
Beginning developers are sometimes not sure which package is right for their project. In general, each JDK version contains Java SE. If you download the Java EE or Java ME, you will get the standard edition with it. For example, the Jave EE is the standard platform with additional tools useful for the development of enterprise applications, such as Enterprise JavaBeans or support for Relational Object Mapping.
It is also not difficult to change to a different JDK in the future if you find that you need it. Do not worry much about choosing the correct version of Java and the JDK package when you have just started.
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