What is the difference between stack and heap in Java?

What is the difference between stack and heap in Java?

In Java, stack and heap are two types of memory used for different purposes. The stack is used for static memory allocation, while the heap is used for dynamic memory allocation.

Can you explain how memory allocation works in the stack?

Sure! The stack stores method calls and local variables. When a method is called, a new block is created on the stack, and when the method exits, that block is removed.

And what about the heap? How does it differ?

The heap is used for objects and data that need to persist beyond the method call. Memory in the heap is managed by the garbage collector, which frees up memory that is no longer in use.

Are there any performance differences between using stack and heap?

Yes, accessing stack memory is generally faster than heap memory because stack allocation is simpler and involves less overhead.