In ArrayList, primitive types have actual values with contiguous locations, however object type allocation is similar to ArrayList.Thus, in ArrayList, the actual objects or elements are never stored at contiguous locations whereas their References can be stored at contiguous locations. Since primitive data types can be created in ArrayList, the members of ArrayList are always given references to the objects at every different memory locations.In arrayList, we can convert the primitive int data type into an Integer object with the help of commands such as “arraylist.add(1)” as shown in example.ArraList enables the use of generic and single dimensional in nature.ArrayList requires more memory to store the elements as well as more time to iterate.Also, it is dynamic, which means one can change the size of the arraylist if the elements are modified in it, which means the length of the arraylist is variable.
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