Part 1: Java Review

• declares a Scanner variable
• declares an array of 26 String values, and initializes each array element with the corresponding lowercase letter of the alphabet
• prompts the user to enter an integer and uses the Scanner's nextInt method to obtain that integer from the user
• prints out the corresponding letter from the array (next part only added after the assignments were turned in: ), so if the input is zero, should print "a", and should print "z" for an input of 25.
• creates a new array of size 27, puts a string containing a space (" ") at index 0 in the new array, and copies all the other letters to positions 1..26 of the new array. The simplest way to do this is to use System.arraycopy()
• loops through the array, printing each entry, either as is, or uppercase if it is a vowel ("a", "e", "i", "o", "u").
• prints the number of non-vowel strings at the end of the loop.

  Requirements

• The program must catch the InputMismatchException from the call to nextInt, in which case the program must display an appropriate error message and end the program.
• The loop should work for any size initial array, and should not depend on the array size -- you may use array.length to find out the size of the array.
• You should memorize the sequence of parameters to System.arraycopy() and their meaning. This will be useful later in the semester (and may appear on quizzes or exams).

Part 2: Recursion

Your program must accept an integer Q on the command line. This integer is the input for all 4 methods. If the command line has anything other than a single integer, your program should print an error message and exit.

If the integer Q is negative or zero, your program should exit without printing anything.

Otherwise, execute each of the following four methods:

1. Method 1: use a loop to print a row of Q asterisks
2. Method 2: use recursion to print a row of Q asterisks
3. Method 3: use a loop to print the numbers Q, Q - 1, ... 3, 2, 1
4. Method 4: use recursion to print the numbers Q, Q - 1, ... 3, 2, 1

Turning in the Assignment

Since this assignment requires you to turn in two classes, they should be named named LastNameFirstNameXY.java, where X is the assignment number and Y is the part number. So for example, for this assignment I would send in BiagioniEdoardo11.java and BiagioniEdoardo12.java.

Grading