2.1.1 Java String Exercise: Parse This

You will need to use some the Java: Strings method to complete this assignment.

To parse something is to break it down into smaller parts. For example to parse a sentence into words, you break out each word in the sentence. That is your assignment. To start, do not include punctuation in your sentence.

Object #1 Parser

This object will have two methods:

1. return the first word of a phrase
2. remove the first word of a phrase

Use this to strat your object:

public class Parser

{

    /**

     * Constructor for objects of class Parser

     */

    public Parser()

    {

    }

    /**

     * Returns the first word of a string

     * 

     * @param  phrase   a phrase that will used as input

     * @return     the fisrt work in parameter phrase

     */

    public String firstWord(String phrase)

    {

        String firstWord ="";

        // your code to extract the first word of the phrase goes here

        return firstWord;

    }

    /**

     * removes the first word of a string

     * 

     * @param  phrase   a phrase that will used as input

     * @return     the phrase less the first word

     */

    public String removeFirstWord(String phrase)

    {

        String newPhrase ="";

        // your code to remove the first word of the phrase goes here

        return newPhrase;

    }

}

Object #2 Sentence

NEW CONCEPT: parameters are passed by value, not by reference. ie. methods only use the values of parameters. The original variable value does not change (yet).

This object will:

• Prompt the user for a sentence
• request the Praser to return the fisrt word
• display each word on a new line

Non critical Input errors to check. These errors will be caught by your program and produce the correct results.

• multiple leading and trailing spaces
• multiple spaces between words

Modifications

DO NOT ATTEMPT until you have the first part working

• display a word count
• remove any special standard punctuation from the words
• determine the average length of the words
• count the number of characters used for punctuation

Modifications Part 2

ALSO SEE: Java: 1D Arrays

DO NOT ATTEMPT until you have the above modifications working

• using an array, count the number of 1 letter words, 2 letters words ... all the way up to words with 10 or more letters in them.
• using an array, count the number of unique words in the sentence. Assume that there are not more than 15 unique words in a sentence. Make sure that the case is ignored.

This code will append a new word to an array:

Output the all stats in the Sentence class.

Read text from a file

Add a new class to this project FileReader

This modification will allow a text file to be read from the computer and parsed.