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Difference Between JRE and JDK and Which One You Need
Difference Between JRE and JDK and Which One You Need
The terms JRE (Java Runtime Environment) and JDK (Java Development Kit) often confuse many developers new to the Java ecosystem. Both play crucial roles in running and developing Java applications, but they serve different purposes. This article will elucidate the differences between JRE and JDK, explaining which one you need based on your requirements.
Java Runtime Environment (JRE)
Definition: JRE is a software package that allows Java applications to run on any platform.
Purpose: The primary purpose of JRE is to provide the necessary environment to run Java applications.
Contents: It includes the Java Virtual Machine (JVM), core libraries, and other components required to run Java programs.
Use Case: If your primary goal is to run Java applications, such as Java-based games or software, then the JRE is sufficient.
Java Development Kit (JDK)
Definition: JDK is a software development kit that provides a platform for developing Java applications from scratch.
Purpose: JDK is intended for developers who need to create and compile Java applications.
Contents: It includes the JRE along with development tools such as the Java Compiler (javac), debuggers, and other utilities.
Use Case: If you plan to develop Java applications, you will need the JDK.
Conclusion
Running Java Applications: You need the JRE.
Developing Java Applications: You need the JDK.
If you are unsure and might want to develop in the future, installing the JDK is a good choice because it includes everything you need to run Java applications as well.
JVM (Java Virtual Machine)
Function: The JVM is an engine that executes Java bytecode. It provides a runtime environment for Java applications and ensures platform independence by converting bytecode into machine-specific code.
Frequently Asked Questions (FAQ)
What is Java Runtime Environment (JRE)? What is Java Development Kit (JDK)? Which one do I need to run Java applications? Which one do I need to develop Java applications? What is the relationship between JRE, JDK, and JVM?Keywords
Kewords: JRE, JDK, Java Development Kit, Java Virtual Machine (JVM)
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