What is Size of Object & Reference Variable | Java Premain Method | Java Agent | Instrumentation

This short tutorial details on writing a basic java agent. The purpose of the agent will be get as simple as possible as the aim of this tutorial is just to get a bit introduced to the the usage of java agents.
In this video you can learn about What is Size of Object & Reference Variable In Java?
What is premain method in java.?
What is Instrumentation.?
What is getSize.?
*Java Agents are Java components that provide instrumentation capabilities to an application. In the context of agents, instrumentation provides the capability of re-defining the content of compiled class that is loaded at run-time without source code manipulation.

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Firebase Tutorial No-6 URl-
https://www.youtube.com/watch?v=5IWBzZui4xA&t=25s



Firebase Tutorial No-1 URl-
https://www.youtube.com/watch?v=gf0VQLfwZ6w&t=25s
Firebase Tutorial No-2 URl-
https://www.youtube.com/watch?v=srgALzxKt6Y&t=521s
Firebase Tutorial No-3 URl-
https://www.youtube.com/watch?v=TW0uOKIyUpE&t=6s
Firebase Tutorial No-4 URl-
https://www.youtube.com/watch?v=XXxRALV9YxI&t=47s
Write program url using Firebase Database-
https://www.dropbox.com/s/wxggu30ajqa992c/FirebaseDemo%20%282%29.zip?dl=0
Sqlite database tutorials part-1 url-
https://www.youtube.com/watch?v=6a9lIxU9XvI&t=21s

Sqlite database tutorials part-2 url-
https://www.youtube.com/watch?v=h1PeqaAQhdg&t=6s

Storage option url-
https://www.youtube.com/watch?v=KgCfx...

Internal Storage url-
https://www.youtube.com/watch?v=O-VKJ...

External Storage url-
https://www.youtube.com/watch?v=EteGm...

Shared Prefrences url-
https://www.youtube.com/watch?v=KZJC2...

Spinner Url-
https://www.youtube.com/watch?v=o3KZz...
CustomListView Url-
https://www.youtube.com/watch?v=2geTp...

ListView In Android Studio Part-1
https://www.youtube.com/watch?v=taItn...

ListView In Android Studio Part-1

ListView In Android Studio Part-2 With EventHandling
https://www.youtube.com/watch?v=F3tsW...

ListView In Android Studio Part-3 With EventHandling
https://www.youtube.com/watch?v=fCh5D...

Firebase:-
https://www.youtube.com/watch?v=Lncmj...

How to Install Java Url-
https://www.youtube.com/watch?v=NXlHE...

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GridLayout url-
https://www.youtube.com/watch?v=B3TUS...

TableLayout url-
https://www.youtube.com/watch?v=wbV3t...

RelativeLayout-
https://www.youtube.com/watch?v=80Kk_...

https://www.youtube.com/watch?v=1jnNF...

Linearlayout-
https://www.youtube.com/watch?v=yY3xL...
https://www.youtube.com/watch?v=vnEdL...

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