Chapter 13, Problem 4PE

Program Plan Intro

Computing a string with the binary digits of a number

Program plan:

Filename: “NonNegativeInteger.java”

This program file is used to define a class “NonNegativeInteger”. In the code,

• Define a class “NonNegativeInteger”.
  • Declare class members “number”.
  • Define a constructor “NonNegativeInteger()”.
    • Initialize the “number”.
  • Define a method “decimalToBinary()”.
    • Call the method “decimalToBinary()” recursively.
  • Define a method “decimalToBinary()”.
    • If the value of “num” is less than 2,
      • Return the string.
        • If the value of “num” is greater than or equal to 2,
        • • Return the calculated value.
  • Define the method “getText()”.
    • Return the “text”.

Filename: “BinaryGenerator.java”

This program file is used to define a class “BinaryGenerator”. In the code,

• Define a class “BinaryGenerator”.
  • Define a method “main()”.
    • Create the object “anInt” of class “NonNegativeInteger”.
    • Call the method “decimalToBinary()” and print the value.
    • Print the expected result.
    • Feed the class “NonNegativeInteger” with value.
    • Call the method “decimalToBinary ()” and print the value.
    • Print the expected result.
    • Feed the class “NonNegativeInteger” with value.
    • Call the method “decimalToBinary ()” and print the value.
    • Print the expected result.
    • Feed the class “NonNegativeInteger” with value.
    • Call the method “decimalToBinary ()” and print the value.
    • Print the expected result.