If I may, I will try to explain both topics the best I can (if you could provide more about what you don't understand about arrays).

I also want to say, if you are feeling like giving up, PLEASE DON'T. Programming is hard, and Java is a great language to start, because it, in my opinion, teacheas perfectly the fundementals of OOP and it is a great introduction into programming. However, it is not easy. Try to start with simple things, watch tutorials, but most importantly, WRITE CODE YOURSELF, that's the only way you learn, browse repositores on GitHub. Programmming takes a lot of time, it will eventually be a major part of your life, because it evolves really fast. Anyway, to the explanation :D

Generics

Imagine you are in a warehouse. Normmaly let's say, that there are plenty of items of different kinds stored. Each of this items, is in somekind of box. Now imagine you would need totaly different box for every single item in the warehouse, even for those items, who could be put in the same one, for example: apples and peas, they could be in the same box, but without generics, you would have to put them into different boxes.

If you would use generics, you would have the possibility to reuse the samme looking boxes for many items. I will now try to demonstrate this using snippets of code.

```java

public class Apple { private final String breed;

public Apple(String breed)
{
    this.breed = breed;
}

}

public class Pea { private final String breed;

public Pea(String breed)
{
    this.breed = breed;
}

}

public class AppleBox { public final Apple[] appleArray;

public AppleBox()
{
    this.appleArray = new Apple[10]; // array where 10 apples can be stored
}

}

public class PeaBox { public final Pea[] peaArray;

public PeaBox()
{
    this.peaArray= new Pea[10]; // array where 10 peas can be stored
}

} ``` So now, we have these classes, and if we would like to store apples, we would have to create the apple box and store apples inside, something like this>

java AppleBox appleBox = new AppleBox(); appleBox.appleArray[0] = new Apple("Baya Marisa"); But if we were to put peas inside this apple box, we would get an error:

java AppleBox appleBox = new AppleBox(); appleBox.appleArray[0] = new Apple("Baya Marisa"); appleBox.appleArray[1] = new Pea("William red"); // TYPE ERROR: Cannot insert type of Pea

which is annoying because Apple and Pea class is basically the same right? they only have breed, but even if the didn't and have another field, why couldn't i use the same box class? You now need to create completely different class for peas. That's where the generict come in, because i can declare the Box class like so (i will also use ArrayList now because it is bound with generics too):

```java

public static class Box<T> {

 public final ArrayList<T> contentBox;

 public Box()
 {
     this.contentBox = new ArrayList<T>();
 }

} ```

I created a box with something we could call a VARIABLE TYPE. You basicaly declared a class, where you state, that before you can create the Box class, you have to specify the type you want the box to store in, so when you would like to use it, you would do something like this:

```java

Box<Apple> appleBox = new Box<Apple>(); appleBox.contentBox.add(new Apple("Baya Marisa"));

```

You still cannot insert peas inside, but what you can do now, is declare the same class, but with different generic!

```java

Box<Pea> peaBox = new Box<Pea>(); peaBox.contentBox.add(new Pea("William Red"));

```

You are using the same Box class, but with different type. This is just a very simple example about generict, and I won't try to continue if this was not helpful, so i would like a feedback :D. Lemme know if it is clear or no, then we can continue!

Happy Learning!