Stack and Heap

Stack and Heap

1. Stack

   • Contains list of active methods in an OOP.
   • Thread of Execution
     • Methods get added (pushed) and removed (popped) from the stack, along with their local variables.
     • Operation is handled by the garbage collector.
     • Active Method N
       • Local variables
     • main
     • Active Method 2
       • Local Variables
     • Active Method 1
       • Local Variables
   • Garbage Collector
     • Items no longer referenced directly or indirectly by stack are removed from heap by GC.
   • Temporary

2. Heap

   • Objects
     • Instance variables
   • Persistent
   • String pool