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.