ArrayList automatically adding null items

Question

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Hello everyone. I\'m making a vocabulary App, in which I need to create a List (or ArrayList). To do so, I\'ve created the following piece

Answer 1

You're probably looking at its internal array with the debugger. That doesn't matter; it's just an implementation detail.

What matters is what's visible through its public API. In other words, what calls to size() (and so on) tell you. (And if that doesn't return 1 in your code example, then something weird is going on!)