Music Organizer dan Pelelangan
Nama = Chaniyah Zulfa Mukhlishah
NRP = 05111740000115
Kelas = PBO-B
Tugas rumah kali ini adalah membuat Music Organizer untuk mengatur dan memutar lagu, dan satu lagi adalah membuat proses pelelangan.
1. MUSIC ORGANIZER
Pada tugas ini, membutuhkan 2 class, yaitu = Class Music Organizer dan Class Music Player.
Pada tugas ini, membutuhkan 2 class, yaitu = Class Music Organizer dan Class Music Player.
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Saat kita menge-Run pada Class Music Organizer, tampilan awal adalah =
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karena belum dibuat playlist, lalu kita membuatnya dengan memilih fungsi 'TambahFile' pada class Music Organizer, dan kita bisa menambahkan lagu/musik yang kita inginkan dengan penambahan awal adalah index ke nol
----(index ke 0)----
----(index ke 1)----
----(index ke 2)----
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Untuk memanggil list yang tersimpan, gunakan fungsi 'listFile' pada class Music Organizer , lalu inputkan index lagu/music
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Untuk menjalankan lagu, gunakan fungsi 'startPlaying' pada class Music Organizer, pilih lagu dengan inputkan nomor/index lagu
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Untuk memberhentikan lagu, gunakan fungsi 'stopPlaying' pada class Music Organizer
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Source Code untuk Class Music Organizer =
/**
* Source Code Class Music Player
* @author Chaniyah Zulfa Mukhlishah
* @version 2018.10.09
*//**
* Source Code Class Music Player
* @author Chaniyah Zulfa Mukhlishah
* @version 2018.10.09
/**
* Source Code Class Music Player
* @author Chaniyah Zulfa Mukhlishah
* @version 2018.10.09
*/
import java.util.ArrayList;
public class MusicOrganizer
{
private ArrayList<String> files;
private MusicPlayer player;
public MusicOrganizer()
{
files = new ArrayList<>();
player = new MusicPlayer();
}
public void tambahFile(String filename)
{
files.add(filename);
}
public int totalFiles()
{
return files.size();
}
public void listFile(int index)
{
if(index >= 0 && index < files.size()) {
String filename = files.get(index);
System.out.println("Lagu nomor " +index+ " adalah: " +filename);
}
}
public void hapusFile(int index)
{
if(index >= 0 && index < files.size()) {
files.remove(index);
}
}
public void startPlaying(int index)
{
String filename = files.get(index);
player.progressing(filename);
}
public void stopPlaying()
{
player.selesai();
}
}
Source Code untuk Class Music Player =
/**
* Source Code Class Music Player
* @author Chaniyah Zulfa Mukhlishah
* @version 2018.10.09
*/
public class MusicPlayer
{
private String song;
public MusicPlayer()
{
System.out.println("Belum ada playlist. Makanya, ayo buat dulu :)");
}
public void progressing(String namafile)
{
song = namafile;
System.out.println(" Music sedang diputar ");
System.out.println(" Playing now = " +song );
}
public void selesai()
{
System.out.println(" Music berhenti diputar ");
}
}
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2. PELELANGAN
Pada tugas ini, membutuhkan 4 class, yaitu =
- Lot = Barang yang di perjual belikan
- Bit = Tawaran
- Person = SI Penawar
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Input nama barang yang akan dilelang (diperjual belikan) , gunakan fungsi 'enterLot' pada Class Auction
, maka setelah di list akan keluar =
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Masukkan nama penawar pada Class Person
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Lalu, masukkan tawaran dari penawar(oran1 dan orang2) menggunakan fungsi 'makeABid' pada Class Auction
(Number 1 menunjukkan penawaran untuk jenis barang ke 1 yaitu Laptop)
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Pelelangan sukses dan dari 2 penawar akan diambil yang menawar paling mahal, yaitu Chan dengan tawaran = 500366 pada laptop
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Setelah proses selesai, maka pelelnagan ditutup menggunakan fungsi 'close' pada Class Auction, dan akan ditunjukkan hasil akhir dari lelangan.
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Source Code untuk Class Auction =
import java.util.ArrayList;
/**
* Pelelangan
* @author Chaniyah Zulfa Mukhlishah
* @version 2018.10.09
*/
public class Auction
{
private ArrayList<Lot> lots;
private int nextLotNumber;
public Auction()
{
lots = new ArrayList<>();
nextLotNumber = 1;
}
public void enterLot(String description)
{
lots.add(new Lot(nextLotNumber, description));
nextLotNumber++;
}
public void showLots()
{
for(Lot lot : lots) {
System.out.println(lot.toString());
}
}
public void makeABid(int lotNumber, Person bidder, long value)
{
Lot selectedLot = getLot(lotNumber);
if(selectedLot != null) {
Bid bid = new Bid(bidder, value);
boolean successful = selectedLot.bidFor(bid);
if(successful) {
System.out.println("The bid for lot number " +
lotNumber + " was successful.");
System.out.println("The bid is especially for " + bidder.getName());
}
else {
// Report which bid is higher.
Bid highestBid = selectedLot.getHighestBid();
System.out.println("Lot number: " + lotNumber +
" already has a bid of: " +
highestBid.getValue());
}
}
}
public Lot getLot(int lotNumber)
{
if((lotNumber >= 1) && (lotNumber < nextLotNumber)) {
// The number seems to be reasonable.
Lot selectedLot = lots.get(lotNumber - 1);
// Include a confidence check to be sure we have the
// right lot.
if(selectedLot.getNumber() != lotNumber) {
System.out.println("Internal error: Lot number " +
selectedLot.getNumber() +
" was returned instead of " +
lotNumber);
// Don't return an invalid lot.
selectedLot = null;
}
return selectedLot;
}
else {
System.out.println("Lot number: " + lotNumber +
" does not exist.");
return null;
}
}
public void close(){
System.out.println("Auction is closed.");
for(Lot lot : lots){
System.out.println(lot.getNumber() + ": " + lot.getDescription());
Bid bid = lot.getHighestBid();
if(bid == null){
System.out.println("There are no more Bids for this lot.");
}
else{
System.out.println("This Item has been sold to " + bid.getBidder().getName() + " Price : " + bid.getValue());
}
}
}
} Source Code untuk Class Lot =
/**
* Source Code Lot
* @author Chaniyah Zulfa Mukhlishah
* @version 2018.10.09
**/
public class Lot
{
private final int number;
private String description;
private Bid highestBid;
public Lot(int number, String description)
{
this.number = number;
this.description = description;
this.highestBid = null;
}
public boolean bidFor(Bid bid)
{
if(highestBid == null) {
// There is no previous bid.
highestBid = bid;
return true;
}
else if(bid.getValue() > highestBid.getValue()) {
// The bid is better than the previous one.
highestBid = bid;
return true;
}
else {
// The bid is not better.
return false;
}
}
public String toString()
{
String details = number + ": " + description;
if(highestBid != null) {
details += " Bid: " +
highestBid.getValue();
}
else {
details += " (No bid)";
}
return details;
}
public int getNumber()
{
return number;
}
public String getDescription()
{
return description;
}
public Bid getHighestBid()
{
return highestBid;
}
}
Source Code untuk Class Lot =
/**
* Source Code Bit
* @author Chaniyah Zulfa Mukhlishah
* @version 2018.10.09
**/
public class Bid
{
// The person making the bid.
private final Person bidder;
// The value of the bid. This could be a large number so
// the long type has been used.
private final long value;
/**
* Create a bid.
* @param bidder Who is bidding for the lot.
* @param value The value of the bid.
*/
public Bid(Person bidder, long value)
{
this.bidder = bidder;
this.value = value;
}
/**
* @return The bidder.
*/
public Person getBidder()
{
return bidder;
}
/**
* @return The value of the bid.
*/
public long getValue()
{
return value;
}
}
Source Code untuk Class Person =
/**
* Source Code Person
* @author Chaniyah Zulfa Mukhlishah
* @version 2018.10.09
**/
public class Person
{
// The name of this person.
private final String name;
public Person(String name)
{
this.name = name;
}
public String getName()
{
return name;
}
}
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