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ArrayList class is a implantation class of LIst interface. Java ArrayList class uses a dynamic array for storing the elements. It inherits AbstractList class and implements List interface.

1) Java ArrayList class is non synchronized.

2) ArrayList allow duplicate objects (element) .

3) Java ArrayList class maintains insertion order.

4) Java ArrayList allows random access because array works at the index basis.

What next?

The next topic is Collections in java

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