What is the difference between JDK, JRE, and JVM?
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The Java Development Kit (JDK) is a set of tools that developers use to create Java programs. It includes the Java Runtime Environment (JRE) and the Java Virtual Machine (JVM). The JRE is a set of libraries that provide the functionality needed to run Java programs. The JVM is a software implementation of a machine that executes Java bytecode. Bytecode is a format that the JVM can understand. It is generated by the JDK when you compile your Java program.
The JDK also includes the compiler, the debugger, and other tools needed to develop Java programs. The JRE is required to run Java programs, but the JDK is not required to run them. The JDK is only needed to build new programs from Java source code.
In summary, the JDK is a software development kit for Java programs, the JRE contains the libraries that you need to run those Java programs, and the JVM executes those bytecodes as machine code.