Zum nachlesen.

Java OOP
Bro Code - Java Full course for free 2025
https://www.youtube.com/watch?v=xTtL8E4LzTQ


W3-Schools - Java Encapsulation
Get and Set
https://www.w3schools.com/java/java_encapsulation.asp

Code Gym - Get and Set
https://codegym.cc/de/groups/posts/getter-und-setter-in-java

Bro Code - How to read a File
https://www.youtube.com/watch?v=eHjbvgw4hsI


Baeldung - ConcurrentModificationException
https://www.baeldung.com/java-concurrentmodificationexception

Build an Online Shopping Cart System Using OOP in Java - Nakul Mitra
https://towardsdev.com/build-an-online-shopping-cart-system-using-oop-in-java-e8e5797f8664