Chapter 9, Problem 1PE

a.

Explanation of Solution

Program:

File name: “StringSort.java”

//Import necessary header files

import java.util.*;

import javax.swing.*;

//Define a class named StringSort

public class StringSort

{

    //Define main method

    public static void main(String[] args)

    {

        //Create an array of 15 string values

String[] values =  {"mouse", "dog", "cat", "horse", "cow",

         "moose", "tiger", "lion", "elephant", "bird", "hamster",

         "guina pig", "leopard", "aardvark", "hummingbird"};

        //Declare the variable

      ...

b.

Explanation of Solution

Program:

File name: “StringSort2.java”

//Import necessary header files

import java.util.*;

import javax.swing.*;

//Define a class named StringSort2

public class StringSort2

{

    //Define main method

    public static void main(String[] args)

    {

        //Create an array of 15 string values

        String[] values = new String[15];

        //Declare the variables and initialize the values

        int x = 0;

        int count = 0;

        String word;

        final String QUIT = "zzz";

        //Declare a Boolean variable and initialize the value

        boolean didUserQuit = false;

/*For loop is executed until x exceeds the length of the given values*/

        for(x = 0; x < values.length; ++x)

            values[x] = QUIT;

        //Assign value 0 to x

        x = 0;

        //While x is less than the length of the given values

        while(x < values.length)

        {

            //Prompt the user to enter a word

word = JOptionPane.showInputDialog(null, "Enter a word or " +

            QUIT + " to quit");

            //If the user enters zzz

            if(word.equals(QUIT))

            {

                count = x;

                x = values...