Java Heap Stack

1. Each program runs with its own memory space, parameter calls, function calls. This space is called stack (stack)

2. All applications can request the memory they need from a shared space in the system. This space is called heap (heap)

3. The JVM automatically manages the stack and heap and cannot directly set the stack and heap.

4. Stack accesses faster than heap

5. In Java, the basic data type, Java instruction code, and constants are stored in the stack.

6. New object is allocated a certain amount of memory in the heap to hold the object instance (only the property value is saved, the method is not saved, the method belongs to the instruction, is saved in the stack)

After the object instance is allocated in the heap, a 4-byte heap memory address (similar to a pointer address) is saved in the stack.

Java Heap Stack