Hallo Zusammen,
beim Programmieren einer BeatBox, trat folgende Fehler auf:
Was hab ich falsch gemacht?
Dankeschön für euere Antworten
1. Fehler beim Server Programm:
Code des Servers
2. Fehler bei der BeatBox
Hier der Code der BeatBox:
beim Programmieren einer BeatBox, trat folgende Fehler auf:
Was hab ich falsch gemacht?
Dankeschön für euere Antworten
1. Fehler beim Server Programm:
Java:
java.net.BindException: Address already in use: JVM_Bind
at java.net.PlainSocketImpl.socketBind(Native Method)
at java.net.PlainSocketImpl.bind(Unknown Source)
at java.net.ServerSocket.bind(Unknown Source)
at java.net.ServerSocket.<init>(Unknown Source)
at java.net.ServerSocket.<init>(Unknown Source)
at MusikServer.los(MusikServer.java:52)
at MusikServer.main(MusikServer.java:11)Code des Servers
Java:
import java.io.*;
import java.net.*;
import java.util.*;
public class MusikServer {
ArrayList<ObjectOutputStream> clientOutputStreams;
public static void main(String[] args) {
new MusikServer().los();
}
public class ClientHandler implements Runnable {
ObjectInputStream in;
Socket clientSocket;
public ClientHandler(Socket socket) {
try {
clientSocket = socket;
in = new ObjectInputStream(clientSocket.getInputStream());
}catch(Exception ex) {ex.printStackTrace();}
}
public void run() {
Object o2 = null;
Object o1 = null;
try {
while (( o1 = in.readObject()) != null) {
o2 = in.readObject();
System.out.println("zwei Objekte gelesen");
esAllenMitteilen(o1, o2);
}
}catch(Exception ex){ex.printStackTrace();}
}
}
public void los() {
clientOutputStreams = new ArrayList<ObjectOutputStream>();
try {
ServerSocket serverSock = new ServerSocket(6000);
while(true) {
Socket clientSocket = serverSock.accept();
ObjectOutputStream out = new ObjectOutputStream(clientSocket.getOutputStream());
clientOutputStreams.add(out);
Thread t = new Thread(new ClientHandler(clientSocket));
t.start();
System.out.println("Verbindung hergestellt");
}
}catch(Exception ex) {ex.printStackTrace();}
}
public void esAllenMitteilen(Object eins, Object zwei) {
Iterator it = clientOutputStreams.iterator();
while(it.hasNext()) {
try {
ObjectOutputStream out = (ObjectOutputStream) it.next();
out.writeObject(eins);
out.writeObject(zwei);
}catch(Exception ex) {ex.printStackTrace();}
}
}
}2. Fehler bei der BeatBox
Java:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at BeatBoxEndfassung.main(BeatBoxEndfassung.java:38)Hier der Code der BeatBox:
Java:
import java.awt.*;
import javax.swing.*;
import javax.sound.midi.*;
import java.util.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import javax.swing.event.*;
public class BeatBoxEndfassung {
JList eingangsListe;
JTextField benutzerNachricht;
JPanel hauptPanel;
ArrayList<JCheckBox>checkboxListe;
int nummerierung;
Vector<String>listenVector = new Vector<String>();
String benutzerName;
ObjectOutputStream out;
ObjectInputStream in;
HashMap<String, boolean[]>andereSeqsMap = new HashMap<String, boolean[]>();
Sequencer sequencer;
Sequence sequence;
Sequence meineSequence = null;
Track track;
JFrame derFrame;
String [] instrumentNamen = {"Bassdrum", "Hit-Hat, geschlossen", "Hi-Hat, offen",
"Snaredrum", "Crashbecken", "Händeklatschen", "Hohes Tom-Tom",
"Hohes Bongo", "Maracas", "Trillerpfeife", "Tiefe Conga", "Kuhglocke",
"Vibraslap", "Tieferes Tom-Tom", "Hohes Agogo", "Hohe Conga, offen"};
int [] instrumente = {35, 42, 46, 38, 49, 39, 50, 60, 70, 72, 64, 56, 58, 47, 67, 63};
public static void main(String[] args) {
new BeatBoxEndfassung().inBetriebNehmen(args[0]); // args[0] ist der Benutzername
}
public void inBetriebNehmen(String name) {
benutzerName = name;
//Verbindung zum Server herstellen
try{
Socket sock = new Socket("127.0.0.1", 4242);
out = new ObjectOutputStream(sock.getOutputStream());
in = new ObjectInputStream(sock.getInputStream());
Thread remote = new Thread(new RemoteReader());
remote.start();
}catch(Exception ex){
System.out.println("Keine Verbindung möglich - sie müssen allein spielen.");
}
midiEinrichten();
guiErstellen();
}
public void guiErstellen() {
derFrame = new JFrame("Cyber-BeatBox");
derFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
BorderLayout layout = new BorderLayout();
JPanel hintergrund = new JPanel(layout);
hintergrund.setBorder(BorderFactory.createEmptyBorder(10, 10, 10 ,10));
checkboxListe = new ArrayList<JCheckBox>();
Box buttonBox = new Box(BoxLayout.Y_AXIS);
JButton start = new JButton("Starten");
start.addActionListener(new MeinStartListener());
buttonBox.add(start);
JButton stopp = new JButton("Stoppen");
stopp.addActionListener(new MeinStoppListener());
buttonBox.add(stopp);
JButton schneller = new JButton("Schneller");
schneller.addActionListener(new MeinSchnellerListener());
buttonBox.add(schneller);
JButton langsamer = new JButton("Langsamer");
langsamer.addActionListener(new MeinLangsamerListener());
buttonBox.add(langsamer);
JButton senden = new JButton("Senden");
senden.addActionListener(new MeinSendenListener());
buttonBox.add(senden);
benutzerNachricht = new JTextField();
buttonBox.add(benutzerNachricht);
eingangsListe = new JList();
eingangsListe.addListSelectionListener(new MeinListSelectionListener());
eingangsListe.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
JScrollPane dieListe = new JScrollPane(eingangsListe);
buttonBox.add(dieListe);
eingangsListe.setListData(listenVector);
Box namensBox = new Box(BoxLayout.Y_AXIS);
for(int i = 0; i < 16; i++) {
namensBox.add(new Label(instrumentNamen[i]));
}
hintergrund.add(BorderLayout.EAST, buttonBox);
hintergrund.add(BorderLayout.WEST, namensBox);
derFrame.getContentPane().add(hintergrund);
GridLayout raster = new GridLayout(16, 16);
raster.setVgap(1);
raster.setHgap(2);
hauptPanel = new JPanel(raster);
hintergrund.add(BorderLayout.CENTER, hauptPanel);
for (int i = 0; i < 256; i++) {
JCheckBox c = new JCheckBox();
c.setSelected(false);
checkboxListe.add(c);
hauptPanel.add(c);
}
derFrame.setBounds(50,50,300,300);
derFrame.pack();
derFrame.setVisible(true);
}//gui-Ende
public void midiEinrichten() {
try{
sequencer = MidiSystem.getSequencer();
sequencer.open();
sequence = new Sequence(Sequence.PPQ, 4);
track = sequence.createTrack();
sequencer.setTempoInBPM(120);
}catch(Exception e) {e.printStackTrace();}
} // Ende midiEinrichten
public void trackErstellenUndStarten(){
ArrayList<Integer> trackListe = null;
sequence.deleteTrack(track);
track = sequence.createTrack();
for(int i = 0; i < 16; i++) {
trackListe = new ArrayList<Integer>();
for(int j = 0; j< 16; j++) {
JCheckBox jc = checkboxListe.get(j + (16*i));
if(jc.isSelected()) {
int taste = instrumente[i];
trackListe.add(new Integer(taste));
}else{
trackListe.add(null);
}
}// Ende innere Schleife
tracksErzeugen(trackListe);
}
track.add(eventErzeugen(192, 9, 1, 0, 16));
try {
sequencer.setSequence(sequence);
sequencer.setLoopCount(Sequencer.LOOP_CONTINUOUSLY);
sequencer.start();
sequencer.setTempoInBPM(120);
}catch(Exception e) {e.printStackTrace();}
}//trackErstellenUndStarten ENDE
public class MeinStartListener implements ActionListener {
public void actionPerformed(ActionEvent a) {
trackErstellenUndStarten();
}
}
public class MeinStoppListener implements ActionListener {
public void actionPerformed(ActionEvent a) {
sequencer.stop();
}
}
public class MeinSchnellerListener implements ActionListener {
public void actionPerformed(ActionEvent a) {
float tempoFactor = sequencer.getTempoFactor();
sequencer.setTempoFactor((float)(tempoFactor * 1.03));
}
}
public class MeinLangsamerListener implements ActionListener {
public void actionPerformed(ActionEvent a) {
float tempoFactor = sequencer.getTempoFactor();
sequencer.setTempoFactor((float)(tempoFactor * 97));
}
}
public class MeinSendenListener implements ActionListener {
public void actionPerformed(ActionEvent a) {
boolean[]checkboxZustand = new boolean[256];
for(int i = 0; i < 256; i++) {
JCheckBox check = (JCheckBox) checkboxListe.get(i);
if(check.isSelected()) {
checkboxZustand[i] = true;
}
}
try {
out.writeObject(benutzerName + nummerierung++
+ " : " + benutzerNachricht.getText());
out.writeObject(checkboxZustand);
}catch(Exception ex){
System.out.println("Tut mir Leid, Senden an Server nicht möglich");
}
benutzerNachricht.setText("");
}
}
public class MeinListSelectionListener implements ListSelectionListener {
public void valueChanged(ListSelectionEvent le) {
if(!le.getValueIsAdjusting()) {
String wahl = (String) eingangsListe.getSelectedValue();
if(wahl != null) {
boolean [] wahlZustand = (boolean[]) andereSeqsMap.get(wahl);
sequenceWechseln(wahlZustand);
sequencer.stop();
trackErstellenUndStarten();
}
}
}
}
public class RemoteReader implements Runnable {
boolean[]checkboxZustand = null;
String anzuzeigenderName = null;
Object obj = null;
public void run(){
try{
while((obj=in.readObject()) != null) {
System.out.println("Object vom Server erhalten");
System.out.println(obj.getClass());
String anzuzeigenderName = (String) obj;
checkboxZustand = (boolean[]) in.readObject();
andereSeqsMap.put(anzuzeigenderName, checkboxZustand);
listenVector.add(anzuzeigenderName);
eingangsListe.setListData(listenVector);
}
}catch(Exception ex) {ex.printStackTrace();}
}
}
public void sequenceWechseln(boolean[] checkboxZustand) {
for(int i = 0; i< 256; i++) {
JCheckBox check = (JCheckBox) checkboxListe.get(i);
if (checkboxZustand[i]) {
check.setSelected(true);
}else {
check.setSelected(false);
}
}
}
public void tracksErzeugen(ArrayList liste) {
Iterator it = liste.iterator();
for (int i = 0; i < 16; i++) {
Integer num = (Integer)it.next();
if(num != 0) {
int numTaste = num.intValue();
track.add(eventErzeugen(144,9, numTaste, 100, i));
track.add(eventErzeugen(128,9, numTaste, 100, i+1));
}
}
}
public MidiEvent eventErzeugen(int comd, int chan, int one, int two, int tick) {
MidiEvent event = null;
try {
ShortMessage a = new ShortMessage();
a.setMessage(comd, chan, one, two);
event = new MidiEvent(a, tick);
}catch(Exception e) {e.printStackTrace();}
return event;
}
} // Klassen-Ende
