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Is it possible to make a child class that extends ArrayList? If so, how?
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The ArrayList size increases dynamically because whenever the ArrayList class requires to resize then it will create a new array of bigger size and copies all the elements from the old array to the new array. And now it is using the new array's reference for its internal usage.
However, ensureCapacity() method of java. util. ArrayList class can be used to increase the capacity of an ArrayList instance, if necessary, to ensure that it can hold at least the number of elements specified by the minimum capacity argument. Parameters: This method takes the desired minimum capacity as a parameter.
The size of an ArrayList cannot be changed after the ArrayList is initialized. Immediately looking at the question, I would think the answer would be false. If you initialize an ArrayList, you can continue adding unlimited elements to it and the ArrayList will automatically resize.
The theoretical limit for ArrayList capacity is Integer. MAX_VALUE, a.k.a. 2^31 - 1, a.k.a. 2,147,483,647.
Yes you can.
public class MyArrayList<E> extends ArrayList<E> { } However, I'm not sure why you would want to do this.
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You can extend any class that is not final in Java. Having said that, you should avoid inheritance if there is no true is-a relationship. Consider composition for reuse. Read about Liskov substitution principle
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