Big Java Late Objects
Big Java Late Objects
2nd Edition
ISBN: 9781119330455
Author: Horstmann
Publisher: WILEY
Question
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Chapter 18, Problem 7PP
Program Plan Intro

Implementing method “map()”

Program plan:

Filename: “ListUtil.java”

This code snippet creates an interface “ListUtil”. In the code,

  • Import the required packages.
  • Define a class “ListUtil”.
    • Define the method “map()”.
      • Create a list “result” of type “List<T>”.
      • Iterate a “for” loop,
        • Add elements to “result”.
      • Return “result”.

Filename: “MapTester.java”

This code snippet creates a class “MapTester”. In the code,

  • Define a class “MapTester”.
    • Define the “main” method.
      • Define a string array “words”.
      • Create a list “wordsList”.
      • Call the method “map()” and set the result to “upper”.
      • Call the method “map()” and set the result to “sizes”.
      • Create an iterator “strItr”.
      • Print the token of “wordsList” using “strItr”.
      • Print the expected token.
      • Print the token of “wordsList” using “strItr”.
      • Print the expected token.
      • Create an iterator “intItr”.
      • Print the token of “wordsList” using “intItr”.
      • Print the expected token.
      • Print the token of “wordsList” using “intItr”.
      • Print the expected token.

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