[CS61B] Notes for class 6-Stack frames

The heap stores all objects, including all arrays and all class variables.

The stack stores all local variables, including parameters.

When a method is called, Java creates a stack frame (aka activation record); stores the parameters and local variables.

Stack of tack frame.

Garbage collection only performs on heap.

When a method finishes, its stack frame is erased.

Method "Thread.dumpStack()": Prints a stack trace of the current thread to the standard error stream. This method is used only for debugging.

Parameter Passing
Java passes all parameters by value: copied.
When parameter is a reference, the reference is copied, but the object is shared.