In this blog we will learn about ArrayList. ArrayList is one of the collection class of collection framework. It is a way of storing elements dynamically in an array. It implements the List interface ...

To reset ArrayList we have two options, one is to use clear() method and another is to use removeAll(). We dont need to worry if size of the ArrayList is small i.e. 10 to 100. But if ArrayList size ...

Arraylist.java is the actual implementation of the features of an arraylist, while TestArray.java is the code written to test the functionality. This code only works on objects.

2.9.0 and 2.8.7 A NullPointerException occured indicating the ArrayList was either null or not of the expected type on Android 11 and 12. Android 10 and below A HashMap is succesfully added to the ...