From fb. I love this pic

Happy me :,)

Hi!
I want to know if there is possibility to find a vulnerability on a .jar file.
I tried to install Kali on VM (for now) and tried to use metasploit but I found that it attacks the inter system on a indicated ip address.
There are many application or video (and so on) for my problem?
This .jar file is an application and I want to do pentesting...
Sorry for my poor english but it isn't my native language.
I'm new in pentesting wolrd 🤣

Boy: I want iphoneX
Me: buy it!
Boy: it's too expensive, my iphone616gb's memory is full!
Me: Take an android, maybe with an sd slot. There are many great cheap model.
Boy: Android sucks! I want an Iphone.
Me: ...........

There are any books which tell how to find vulnerability on a system?
or maybe sites...

Problem.

Power off --> power on

Solved.

It's a kind of magic 😍
why dosen't work in Real life?

Web-project on Eclipse EE:
Project1 : all goes in the right way.
Project2 : JRE System Library doesn't exist.

Dear eclipse/jdk/jre (whoever you are) what's wrong with you?

P.s. i only added a file in both projects.