Pass by Value vs. Pass by Reference
https://www.youtube.com/watch?v=BHtfb3lfc-g
https://www.youtube.com/watch?v=h9uD7ipqu3w
https://www.youtube.com/watch?v=N8IeMYsdgAY
Java always pass by value
Value is the copy
Reference is the original address in the memory
In this video, I explain using examples how Java passes object references by value (that is to say - passes a copy of the object variables, arrays, etc) . In particular, I illustrate in detail how the passing by value of object references can exhibit behavior that is very similar to passing by reference (i.e. passing the original object memory address).
Stack + Heap with Reference & Instance Variables & local variables
https://www.youtube.com/watch?v=UcPuWY0wn3w
https://www.youtube.com/watch?v=I6yo9V5nvPw
Stack: primitive type, reference of var
Heap: object
Class Car{
Int hp;
}
Car myCar;
myCar = new Car();
my2Car = new Car();
my2Car.hp = 120;
myCar is the reference var , the address or the reference var is in the stack
The object new Car() is in the heap
Garbage collection runs on the heap. clean objects which has no reference points to
Them, this saves memory for future
my2Car() is a reference var which has the
Address of the object new Car()
The object new Car() resides on the heap
And it has an instance variable hp
Also resides on the heap inside of the new Car()
Now the instance var we have seen is a primitive type
22:00
Confusing part when we have a non primitive
Type as instance var
Java for beginner playlist
https://www.youtube.com/watch?v=bwUWEioRlgE&list=PLlxmoA0rQ-LzrFmbcHy2vUYIr9ZRo83yv
Start from # 9.1