In Java, how many types of memory areas are allocated by the JVM?

Java Virtual Machine is a program/software that receives Java bytecode (.class file) and convert the bytecode (line by line) into machine understandable code.

The JVM contains a module called a class loader. The class loader in the JVM is responsible for loading, linking, and initializing programs. It:

• Loads the class into memory.

• Verify bytecode instructions.

• Allocate memory for the program.

JVM memory location

JVM has five memory locations, which are:

• Heap - Allocate runtime storage for objects (reference types).

• Stack - Stores local variables and partial results. The stack contains frames, and each thread is allocated one frame. After the thread completes, the frame is also destroyed. It also plays a role in method calls and returns.

• PC Register - The Program Counter register contains the address of the instruction currently executed by the JVM.

• Execution Engine - It has a virtual processor, an interpreter that interprets bytecode instructions one by one, and a just-in-time compiler.

• Native Method Stack - It contains all the native methods used by the application.

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