Two Dimensional array

Write a program that:

  • Queries the user to enter two integer numbers; one representing the number of rows in a two dimensional array and the other the number of columns. Dynamically create the two dimensional array Iterate through this array and:
    • if the row index = 0, place a '0' in the element
    • if the column index = 0, place an 'a' in the element
    • if both the row index and column index are even place an 'x' in the element
    • if both the row index and column index are odd place a 'y' in the element
    • place a 'b' in all other elements
  • Iterate through the array and count and present to the user the number of each value ('0','a','b','x','y') present in the array.
  • Iterate through the array and display its contents in a logical manner on the standard output device

Utility Class Homework

create a Utility class containing three methods that can be called without instantiation. The three classes are:

  • String queryUserForString(String title, String message) A method that displays the message message in a JOptionPane dialog having the title title and returns the string entered by the user.
  • long queryUserForInteger(String title, String message) A method that displays the message message in a JOptionPane dialog having the title title and returns the integer value entered by the user.
  • double queryUserForDouble(String title, String message) A method that displays the message message in a JOptionPane dialog having the title title and returns the floating point value entered by the user.

Accumulator Object

Create the class definition for this accumulator object. Make sure you:

  • have a constructor that initializes the accumulator to 0
  • an appropriate mutator method for each instance variable
  • an appropriate accessor method for each instance variable
  • a method called with the prototype void add(int value) that adds the value value to the accumulator only if value is > 0
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