Hey:)
I am creating a project in java,but have been sick for the passed 3 weeks, so I am a bit stuck on how some of the code should look,and where it should be
the details are that I am required to develope an application that will allow the user to manage their downloads, the bit I am stuck on is the user should be able to add delete, order and search the array of objects
this is what I have done so far,r any pointers in the right direction would be great or links where I would find examples would be great too
thanks in advance:))))
there is a lot of code here but I am pasting it 3 parts so people can see that i have put work in,
//class file
import javax.swing;
public class DownLoadManager
{
public static String albumTitle;
public static String albumName;
public static String albumArtist;
public static String albumWebSite;
public static double albumPrice;
DownLoadManager(String aTitle, String anAlbum, String anArtist, String aSite, double aPrice)
{
albumTitle = aTitle;
albumName = anAlbum;
albumArtist = anArtist;
albumWebsite = aSite;
albumPrice = aPrice;
}
public String getTitle()
{
return title;
}
public String getAlbumName()
{
return albumName;
}
public String getAlbumArtist()
{
return albumArtist;
}
public String getAlbumWebSite()
{
return albumWebSite;
}
Public double getAlbumPrice()
{
return albumPrice;
}
}
//main method
import java.util.Scanner;
public class MyDownload
{
public class main(String [] args)
{
String results ="";
{
MyDownload [] MyDownloads = new DownLoad[4];
myDownLoads[0] = new DownLoad("Confessions on a dance Floor", "Madonna", "Hung Up");
myDownLoads[1] = new DownLoad("The legend of the Fall Offs", "Busta Rhymes", "The big Bang");
myDownloads[2] = new DownLoad("Audioslave", "Audioslave", "Gasoline");
myDownloads[3] = new DownLoad("Sevas Tra","'Sacrilege", "Otep");
Scanner keyboard = new Scanner(System.in);
System.out.println("1. Order Download by album title - ascending sequence");
System.out.println("2. Order Download by album artist - ascending sequence");
System.out.println("3. Order Download by album - ascending sequence");
System.out.println("4. Order Download by price - descending sequence");
System.out.print(" Enter selection 1, 2, 3, 4.\t\t");
int selection = Integer.parseInt(keyboard.nextLine());
if (selection == 1)
{
bubbleSortOnAlbumTitleAscendingSequence(myDownLoads);
displayDownLoads(myDownLoads);
}
else if (selection == 2)
{
bubbleSortOnAlbumArtistAscendingSequence(myDownLoads);
displayDownLoads(myDownLoads);
}
else if (selection == 3)
{
bubbleSortOnAlbumAescendingSequence(myDownloads);
displayDownloads(myDownloads);
}
else if (selection == 4)
{
bubbleSortOnPriceDescendingSequence(myDownloads);
displayDownloads(myDownloads);
}
else
System.out.print("Invalid selection");
}
public static void bubbleSortOnAlbumTitleAscendingSequence(Download[] downloads)
{
int pass, comparison;
Download temp;
for (pass=1; pass <= (downloads.length-1); pass++)
{
for (comparison = 1; comparison <= (downloads.length-pass); comparison++)
{
if (downloads[comparison-1].getAlbumTitle().compareTo(downloads[comparison].getAlbumTitle())>0)
{
temp = downloads[comparison-1];
downloads[comparison-1] = downloads[comparison];
downloads[comparison] = temp;
}
}
}
}
public static void bubbleSortOnAlbumArtistAscendingSequence(Download[] downloads)
{
int pass, comparison;
Download temp;
for (pass=1; pass <= (downloads.length-1); pass++)
{
for (comparison = 1; comparison <= (downloads.length-pass); comparison++)
{
if (downloads[comparison-1].getAlbumArtist().compareTo(downloads[comparison].getAlbumArtist())>0)
{
temp = downloads[comparison-1];
downloads[comparison-1] = downloads[comparison];
downloads[comparison] = temp;
}
}
}
}
public static void bubbleSortOnAlbumAscendingSequence(Download[] downloads)
{
int pass, comparison;
Download temp;
for (pass=1; pass <= (downloads.length-1); pass++)
{
for (comparison = 1; comparison <= (downloads.length-pass); comparison++)
{
if (downloads[comparison-1].getAlbum().compareTo(downloads[comparison].getAlbum())>0)
{
temp = downloads[comparison-1];
downloads[comparison-1] = downloads[comparison];
downloads[comparison] = temp;
}
}
}
}
public static void bubbleSortOnPriceDescendingSequence(Download[] downloads)
{
int pass, comparison;
Download temp;
for (pass=1; pass <= (downloads.length-1); pass++)
{
for (comparison = 1; comparison <= (downloads.length-pass); comparison++)
{
if (downloads[comparison-1].getPrice().compareTo(downloads[comparison].getPrice())>0)
{
temp = downloads[comparison-1];
downloads[comparison-1] = downloads[comparison];
downloads[comparison] = temp;
}
}
}
}
public static void displayDownloads(MyDownload[] downloads)
{
for (int i = 0; i < downloads.length; i++)
System.out.println(downloads[i].getAlbumTitle() + "\n" +
downloads[i].getAlbumArtist() + "\n" +
downloads[i].getAlbum() + "\n" +
downloads[i].getPrice());
}
}
//reading a file into an array of objects
import javax.swing.JOptionPane;
import java.io*;
public class ArrayFromFile
{
public static void main(String [] args throw IOException
{
FileReader aFileReader = new FileReader("downloadManager.txt");
BufferedReader aBufferedReader = new BufferedReader(aFileReader);
String lineFromFile;
int lineCount = 0;
while ( ( lineFromFile = aBufferedReader.readLine()) != null)
{
lineCount++]
}
aBufferedReader.close();
aFileReader.close();
DownLoadManager[] myDownloads = new DownLoad[lineCount];
String[] fileDetailes;
String aTitle;
String aName;
String anArtist;
String aSite;
double aPrice;
aFileReader = new FileReader("downloadManager.txt");
aBufferedReader = new BufferedReader(aFileReader);
while ( ( lineFromFile = aBufferedReader.readLine()) != null)
{
fileDetailes = lineFromFile.Split(",");
aTitle = fileDetailes[0]);
aName = fileDetails[1]);
anArtist = fileDetails[2]);
aSite = fileDetails[3]);
aPrice = Double.parseDouble(fileDetails[4]);
myDownLoads[count] = new DownLoad(aTitle, aName, anArtist, aSite, aPrice);
count++;
}
aBufferedReader.close();
aFileReader.close();
for (int i = 0; i <count;i++)
{
System.out.println(myDownLoads[i].getAlbumTitle() + " " + myDownLoads[i].getAlbumArtist() + " " + myDownLoads[i].getAlbumName() + " " + myDownLoads[i].getAlbumPrice());
}
}
}
