Java coding

Java coding question: Implement IntArrayList using primitive array int[] with these operations 1) default constructor 2) void add(int value) // would append to the end of the array and extends internal storage if necessary 3) int get(int index) // return the value at given index 4) void delete(int index) // left shift all trailing elements after the deleted entry. Bonus 5) void set (int value, int index) // extends the internal storage as necessary. Can ignore the items in between. 6) What's the best data structure to use for this if we were not to use the primitive array Javascript coding can be done via this url