Java Components

Step 1: Role of JDK.
The Java Development Kit (JDK) is a complete software development kit required for compiling, debugging, and running Java programs.

Step 2: Difference from JRE and JVM.
- JRE (Java Runtime Environment) is only for running programs, not compiling.
- JVM (Java Virtual Machine) executes the bytecode, but cannot compile.
- JIT (Just-In-Time compiler) is a part of JVM to speed execution. Thus, the correct development tool is JDK.

Final Answer:

Step 1: Expand the abbreviation.
JVM stands for Java Virtual Machine.

Step 2: Purpose of JVM.
It provides a runtime environment to execute Java bytecode. It makes Java platform-independent, as the same bytecode can run on different systems using the JVM.

Final Answer: