Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
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Chapter 21, Problem 21.3PE
Program Plan Intro

CountKeywords.Java

Program Plan:

  • Include a class named “CountKeywords”.
    • Import “util” package.
    • Import “io” package.
    • Declare the main method.
    • Check if user has inputted any command line argument or not.
      • If the command line argument is empty then print “Usage:Filename” and exit from the system.
      • Create a file inputted by the user from the command line.
      • Check if file exists and print the number of keywords by invoking the CountKeywords() method.
    • Declare a method that returns the number of keywords in a file.
    • Create an array containing all the keywords present in java.
    • Set all the keywords into a new HashSet named “KeywordSet”.
    • Run a loop till the end of file.
      • Exclude the comments, strings and block elements present in the file.
    • Return the number of keywords.
  • Create a new text file “file”.
    • Add words into the text file.

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(True/False): When a program's source code is changed, it must be reassembled and linked before it can be executed.
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