Java OOP Lesson 3 and 4

Hello fellow replers:

This is lesson 3 and 4 in my tutorial Java OOP.

In these two lessons, you will learn how hide your data correctly(and why) and how to use extends keyword and when to use it.

If you have any questions PLEASE PLEASE PLEASE ASK. I am ready for all questions.

If you enjoyed, let me know! Thank you!

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@Wuru, It's ok :)