Concept explainers
a.
Explanation of Solution
Program:
File name: “Recording.java”
//Define a class named Recording
public class Recording
{
//Declare the variables
private String song;
private String artist;
private int playTime;
//Define a set method that takes the Recording’s title
public void setSong(String title)
{
//Assign the value
song = title;
}
//Define a set method that takes the Recording’s artist
public void setArtist(String name)
{
//Assign the value
artist = name;
}
/*Define a set method that takes the Recording’s playing time*/
public void setPlayTime(int time)
�...
b.
Explanation of Solution
Program:
File name: “RecordingSort.java”
//Import necessary header files
import javax.swing.*;
//Define a class named RecordingSort
public class RecordingSort
{
//Define a main method
public static void main(String[] args)
{
//Declare an array of five Recording objects
Recording[] recordings = new Recording[5];
//Declare the variables
int x;
String song, artist, timeString, order, message = "";
int time;
//For loop to be executed until x exceeds 5
for(x = 0; x < recordings.length; ++x)
{
//Prompt the user to enter a song for recording
song = JOptionPane.showInputDialog(null,
"Enter a song for recording " + (x + 1));
//Prompt the user to enter an artist for recording
artist = JOptionPane.showInputDialog(null,
"Enter an artist for recording " + (x + 1));
//Prompt the user to enter the time for the recording
timeString = JOptionPane.showInputDialog(null,
"Enter the time for the recording in seconds" + (x + 1));
time = Integer.parseInt(timeString);
//Declare a temp object
Recording temp = new Recording();
//Function Call
temp.setArtist(artist);
temp.setSong(song);
temp.setPlayTime(time);
//Assign the value
recordings[x] = temp;
}
/*Prompt the user to enter the choice of displaying
the objects in order by song title, artist, or playing time*/
order = JOptionPane.showInputDialog(null,
"By which field do you want to sort?\n" +
"(S)ong, (A)rtist, or (T)ime");
//If the user enters a choice, song title
if(order.charAt(0) == 'S')
//Function call
sortBySong(recordings);
//If the user enters a choice, Artist
else
if(order.charAt(0) == 'A')
//Function call
sortByArtist(recordings);
//Else the user enters a choice, playing time
else
//Function call
sortByTime(recordings);
//For loop to be executed until x exceeds 5
for(x = 0; x < recordings.length; ++x)
//Print the message
message = message + "\nartist: " + recordings[x].getArtist() +
" song: " + recordings[x].getSong() + " time: " +
recordings[x].getPlayTime();
JOptionPane.showMessageDialog(null, message);
}
/*Define a method to sort the Recording objects in
artist order*/
public static void sortByArtist(Recording[] array)
{
//Declare the variables
int a,b;
Recording temp;
String stringB, stringBPlus;
int highSubscript = array.length - 1;
//For loop to be executed until a exceeds highSubscript
for(a = 0; a < highSubscript; ++a)
//For loop to be executed until b exceeds highSubscript
for(b = 0; b < highSubscript; ++b)
{
stringB = array[b]...
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