I need to create a class which does the exact same functionality as a Set does, but for this project I'm not allowed to use the java import for sets.

The only functions I need are adding to the set and removing from a set.

If someone has done this in the past can you please share? Or can someone start me off with the code for how this can be done?

Set is just an interface that other classes if using it need to implement its methods. Not sure what you want to code there...

Well make a class with a Generic Type:

class mySet<T> {
ArrayList<T> al = new ArrayList<T>();
public void add(T t) {
al.add(t);
}
public void remove (T t) {
al.remove(t);
}
}

Something like this?

Make a list of the functionality you want to give your class. Make a list of the methods you'll need and the data structures to support the data in the set.
Do a little design work and start coding.

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