GIVEN THE CODE BELOW Given the following class: /** * Document class. */ public class Document...

GIVEN THE CODE BELOW
Given the following class:
/**
* Document class.
*/
public class Document {
private int words;
/**
* constructor
* pre: none
* post: A Document object created. Words initialized to 0.
*/
public Document() {
words = 0; //default words
}
/**
* Changes the number of document words.
* pre: none
* post: Words has been changed.
*/
public void setWords(int numWords) {
words = numWords;
}

/**
* Calculates the number of pages.
* pre: none
* post: The number of pages has been returned.
*/

public int calculatePages() {
final int WORDS_PER_PAGE = 300;
int pages;
pages = words / WORDS_PER_PAGE;
if (words % WORDS_PER_PAGE > 0) {
pages += 1;
}
return(pages);
}

/**
* Returns the number of words in a document.
* pre: none
* post: The number of document words has been returned.
*/
public int getWords() {
return(words);
}
}

Create an Essay class that inherits the Document class. The Essay class should include member constants MIN_WORDS and MAX_WORDS.
An essay should be between 1500 and 3000 words. The Essay class should also contain
a member method validLength(), which returns true when the Essay object contains between MIN_WORDS and MAX_WORDS and false otherwise.
**Create an EssayAssignment application that tests the Essay class. EssayAssignment will contain the main() method.

Expert Solution

Program:

/**
* Document class.
*/
public class Document {
private int words;
/**
* constructor
* pre: none
* post: A Document object created. Words initialized to 0.
*/
public Document() {
words = 0; //default words
}
/**
* Changes the number of document words.
* pre: none
* post: Words has been changed.
*/
public void setWords(int numWords) {
words = numWords;
}

/**
* Calculates the number of pages.
* pre: none
* post: The number of pages has been returned.
*/

public int calculatePages() {
final int WORDS_PER_PAGE = 300;
int pages;
pages = words / WORDS_PER_PAGE;
if (words % WORDS_PER_PAGE > 0) {
pages += 1;
}
return(pages);
}

/**
* Returns the number of words in a document.
* pre: none
* post: The number of document words has been returned.
*/
public int getWords() {
return(words);
}
}

/**
* Essay class extends Document class
*/
public class Essay extends Document
{
   /* member constants */
   final int MIN_WORDS = 1500;
   final int MAX_WORDS = 3000;

   /**
   * Returns returns true when the Essay object contains between
   * MIN_WORDS and MAX_WORDS and false otherwise
   * pre: none
   * post: return true when the Essay object contains between
   * MIN_WORDS and MAX_WORDS and false otherwise
   */
   public boolean validLength()
   {
       if(getWords() >= MIN_WORDS && getWords()<=MAX_WORDS)
           return true;
       return false;
   }
}

/**
* EssayAssignment class
*/
public class EssayAssignment
{
   //main method
   public static void main (String[] args)
   {
       //create an object of Essay class
       Essay essay = new Essay();

       //set the number of words
       essay.setWords(2000);

       //display the number of words
       System.out.println ("Number of words: " + essay.getWords());

       //display the number of pages
       System.out.println ("The number of pages: " + essay.calculatePages());

       //check valid length
       if(essay.validLength())
           System.out.println ("Valid length");
       else
           System.out.println ("Invalid length");
   }
}

Output:

Number of words: 2000
The number of pages: 7
Valid length

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venereology answered 5 months ago

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