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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Answer 1

Question

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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Answer 2

Question

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.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 3

Question

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.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

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.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 5

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.

Answer 6

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.

Answer 7

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.

Answer 8

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Answer 10

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Answer 11

Ch. 21.2 - Prob. 21.2.1CP Ch. 21.2 - Prob. 21.2.2CP Ch. 21.2 - Prob. 21.2.3CP Ch. 21.2 - Prob. 21.2.4CP Ch. 21.2 - Prob. 21.2.5CP Ch. 21.2 - Suppose set1 is a set that contains the strings...Ch. 21.2 - Prob. 21.2.7CP Ch. 21.2 - Prob. 21.2.8CP Ch. 21.2 - What will the output be if lines 67 in Listing...Ch. 21.2 - Prob. 21.2.10CP

Solution Summary: The author explains how to create a class called CountKeywords in Java.

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