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Stack vs Heap Memory Allocation in Java

Stack vs Heap Memory Allocation in Java

Author

  • Stack vs Heap Memory Allocation in Java

    Elliot Brenya Sarfo

    Elliot Brenya Sarfo is a highly experienced frontend web developer, possessing over three years of expertise in the creation of engaging and interactive user interfaces. He holds a degree in computer science and operates anythingProgramming.com. He is committed to utilizing technology for the betterment of society, he is dedicated to continuous learning and growth. A demonstrated leader and entrepreneur, he is driven to make a meaningful impact in the world.

Frequently Asked Questions

In Java, when a function or method is invoked, a new stack frame is added to the top of the stack. This stack frame contains all the local variables and arguments for the function. The stack frame is then removed from the stack when the function returns. Stack memory stores these stack frames and facilitates the function calls.

In Java, stack memory tends to be faster than heap memory due to its smaller size and greater efficiency. Additionally, stack memory is stored directly in the CPU's memory, which makes it quicker to access than heap memory which is stored in RAM.

The Java Virtual Machine (JVM) employs garbage collection to free up memory that has been allocated to objects that are no longer in use. The garbage collector periodically scans the heap, a region of memory where objects are stored, and identifies objects that are no longer being referenced by any code. These objects are marked for garbage collection and their memory is released. This process helps to prevent the heap from reaching its capacity and running out of memory.

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