Chapter 9, Problem 23PP

Program Plan Intro

A method that accepts an array of integers and “NumberFormatter” object

Program plan:

• In a file “NumberFormatter.java”, create an interface “NumberFormatter”,
  • Declare the method “format()”.
• In a file “DefaultFormatter.java”, create a class “DefaultFormatter” that implements “NumberFormatter” interface,
  • Define the method “format()”,
    • Return the formatted value.
• In a file “FormatIntsTester.java”, create a class “FormatIntsTester”,
  • Define the method “format_Ints()” that takes an integer array and object of “NumberFormatter” as arguments,
    • Create a loop,
      • Print the formatted output.
        • Define the method “main()”,
        • • Initialize the array.
          • Print the string heading.
          • Call the method “format_Ints()”.