This assignment is designed to give you practice with javadoc, creating unit tests and using junit. be sure to follow all style and documentation requirements for this class. see the style and documentation requirements posted on canvas. you are to name your package assign1 and your file palindrome. java. palindrome classpalindrome-teststring : string+ palindrome (string)+ ispalindrome (): booleanthe method ispalindrome is to determine if a string is a palindrome. a palindrome, for this assignment, is defined as a word or phrase consisting of alphanumeric characters that reads the same frontwards and backwards while ignoring cases, punctuation and white space. if there are no alphanumeric characters, the string is considered a palindrome. the method should return true if it is a palindrome and false otherwise. notice – there is no main, no input and no output for this assignment. you are limited to the following java library classes.-string-character

Write a modular program (no classes yet, just from what you learned last year), that allows two players to play a game of tic-tac-toe. use a two-dimensional char array with 3 rows and 3 columns as the game board. each element of the array should be initialized with an asterisk (*). the program should display the initial board configuration and then start a loop that does the following: allow player 1 to select a location on the board for an x by entering a row and column number. then redisplay the board with an x replacing the * in the chosen location. if there is no winner yet and the board is not yet full, allow player 2 to select a location on the board for an o by entering a row and column number. then redisplay the board with an o replacing the * in the chosen location. the loop should continue until a player has won or a tie has occurred, then display a message indicating who won, or reporting that a tie occurred. player 1 wins when there are three xs in a row, a column, or a diagonal on the game board. player 2 wins when there are three ox in a row, a column, or a diagonal on the game board. a tie occurs when all of the locations on the board are full, but there is no winner. input validation: only allow legal moves to be entered. the row must be 1, 2, or 3. the column must be 1, 2 3. the (row, column) position entered must currently be empty (i.e., still have an asterisk in it).