a) Can you develop Java code.Create a recursive function to print all permutations of a string. For example, the permutation of the string "abc" is [abc, acb, bac, bca, cab, cba]. b) Revise the genericStack class to use an array instead of an ArrayList. Before adding a new element, make sure the array size is correct. If the current array is full, construct a new array twice the size, copy the elements, and add the new array. dont use ai

In Java B. Create class and name it as ArrayOperation. Write the main function In the main function, define array of one dimensional size of 5, of type Sring . The name of the array is StringList. Store the followings values into the array "Information", "Science", "Math", "Data base", "Machine Learning" Create function and name it as The type of function is void, and it has String array of one dimensional. The name of the array is StringArr defined in the function header as formal parameter. UpperCase function should convert all the values of the array to upper case words.  Create function and name it as The type of function is void, and it has String array of one dimensional. The name of the array is StringArr defined in the function header as formal. LowerCase function should convert all the values of the array to lower case words.  Create function and name it as PrintArray. The type of function is void and it has String array of one dimensional. The name of the array is…

Using java, answer the following questions about the code below. 1) Create a new function or method that checks to see if an int parameter is present in the list. 2) Create a main() method or JUnit tests to show that your list code functions as intended.   (Code) private class Nodeint data;Node next;Node(int data) {this.data = data;this.next = null;}}private Node first;private Node last; public void addToEnd(int data){ Node newNode = new Node(data);if (first == null){first = newNode;last = newNode;} else {last.next = newNode;last = newNode;}}public void printList(){ Node current = first;while (current != null){System.out.print(current.data + " ");current = current.next;}System.out.println();}public static void main(String[] args){node list = new node();list.addToEnd(2);list.addToEnd(4);list.addToEnd(6);list.printList();}}

how would you do this? this is a non graded practice lab