writing a general-purpose sort method in Java, the sort method needs to compare objects. There are two ways to give the sort method the code to compare objects, implementing the interfaces Comparable and Comparator respectively. Briefly, describe the two ways. Write excerpts of use examples

The "dynamic array" data structure is used as the basis of Java's ArrayList library class. Describe this data structure and explain how it achieves (amortized) constant-time adding of elements, while also giving constant-time random access of elements. As part of your answer, make sure to explain what "amortized" means for the data structure.

Write a java class named First_Last_Recursive_Merge_Sort that implements the recursive algorithm for Merge Sort. You can use the structure below for your implementation. public class First_Last_Recursive_Merge_Sort { //This can be used to test your implementation. public static void main(String[] args) { final String[] items = {"Zeke", "Bob", "Ali", "John", "Jody", "Jamie", "Bill", "Rob", "Zeke", "Clayton"}; display(items, items.length - 1); mergeSort(items, 0, items.length - 1); display(items, items.length - 1); } private static <T extends Comparable<? super T>> void mergeSort(T[] a, int first, int last) { //<Your implementation of the recursive algorithm for Merge Sort should go here> } // end mergeSort private static <T extends Comparable<? super T>> void merge(T[] a, T[] tempArray, int first, int mid, int last) { //<Your implementation of the merge algorithm should go here> } // end merge //Just a quick method to display the whole array. public…

I need the code from start to end with no errors and the explanation for the code ObjectivesJava refresher (including file I/O)Use recursionDescriptionFor this project, you get to write a maze solver. A maze is a two dimensional array of chars. Walls are represented as '#'s and ' ' are empty squares. The maze entrance is always in the first row, second column (and will always be an empty square). There will be zero or more exits along the outside perimeter. To be considered an exit, it must be reachable from the entrance. The entrance is not an exit.Here are some example mazes:mazeA7 9# # ###### # #   ## # # #### #     ## ##### ##       ########## RequirementsWrite a MazeSolver class in Java. This program needs to prompt the user for a maze filename and then explore the maze. Display how many exits were found and the positions (not indices) of the valid exits. Your program can display the valid exits found in any order. See the examples below for exact output requirements. Also, record…