Will the Guru

Stack

• First-In-Last-Out structure.
• Stores local variables, reference variables, as it lives for short lifetime.
• It only stores simple data types like primitives(e.g. int, double, ..) . It doesn’t save complex data types like objects.
• Each Thread has its own Stack
  • Data on a stack cannot be accessed from other threads

Heap

• Objects are stored on the heap.
• Heap is shared across all threads.

Example of Stack and Heap

Reference

• https://www.udemy.com/course/java-application-performance-and-memory-management/