Big Java, Binder Ready Version: Early Objects
Big Java, Binder Ready Version: Early Objects
6th Edition
ISBN: 9781119056447
Author: Cay S. Horstmann
Publisher: WILEY
Question
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Chapter 16, Problem 11PP
Program Plan Intro

A method “merge()”

Program plan:

  • In a file “LispList.java”, create a class “LispList”,
    • Create an object for “EmptyList”.
    • Declare the method “isEmpty()”.
    • Declare the method “head()”.
    • Declare the method “tail()”.
    • Declare the method “cons()”.
    • Declare the method “merge()”.
  • In a file “EmptyList.java”, create a class “EmptyList”,
    • Define the default constructor.
    • Define the “cons()” method to return the object of “NonEmptyList”.
    • Define the method “isEmpty()” to returns true.
    • Define the method “merge()” that returns object that are passed to this function as an argument.
    • Define the method “head()” that returns an exception “UnsupportedOperationException”.
    • Define the method “tail()” that returns an exception “UnsupportedOperationException”.
    • Define the method “toString()” that returns empty string.
  • In a file “NonEmptyList.java”, create a class “NonEmptyList”,
    • Declare the object for “Object” and “LispList”.
    • Define the constructor that assigns the object properties.
    • Define the “cons()” method to return the object of “NonEmptyList”.
    • Define the method “isEmpty()” that returns false.
    • Define the method “merge()”,
      • Return the object created for “NonEmptyList”.
        • Define the method “head()” that returns the object properties of “Object”.
        • Define the method “tail()” that returns the object properties of “LispList”.
        • Define the method “toString()” that returns the string representation.
  • In a file “LispListTest.java”, create a class “LispListTest”,
    • Define the method “main()”,
      • Create an object for “EmptyList” to create list “1”..
      • Create an object for “NonEmptyList” to create list “2’.
      • Assign the value returned from the method “cons()” to the list “3”.
      • Create the fourth list with the value returned from the method “merge()” that merges list “3” and “2”.
      • Print the actual list “4” and then the expected list “4”.
      • Print the actual output of merging List “2” and “3” and then the expected output.
      • Print the actual output of merging List “1” and “2” and then the expected output.
      • Print the actual output of merging List “2” and “1” and then the expected output.
      • Print the actual output of merging List “2” and “2” and then the expected output.
      • Print the actual output of merging List “1” and “1” and then the expected output.

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Big Java, Binder Ready Version: Early Objects

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