how to create a software which manage a landry?

Question

if possible with java language or C

Answer 1

What is a landry and what exactly are you trying to manage? What's the specifications for what you're wanting to create?

https://www.sololearn.com/Course/Java/
https://www.sololearn.com/Course/CSharp/

^First things first, you'll want to learn the language so you can get started with it. Either language would be a good choice for your task, so you can't really go wrong with either of them.

What platform are you wishing to run the software from? That's something to consider as some languages work better or worse on a given platform.