Beatbox with GUI and chat function

BeatBoxFinal.java

// make a beatbox

import java.awt.*;
import javax.swing.*; 
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

import java.io.*;
import javax.sound.midi.*; 
import java.util.*;
import java.awt.event.*;
import java.net.*;


public class BeatBoxFinal {

	JFrame theFrame;
	JPanel mainPanel;
	JList incomingList;
	JTextField userMessage;
	ArrayList<JCheckBox> checkboxList; // store checkboxes in array
	int nextNum;
	Vector<String> listVector = new Vector<String>();
	String userName;
	ObjectInputStream in;
	ObjectOutputStream out;
	HashMap<String, boolean[]> otherSeqsMap = new HashMap<String, boolean[]>();
	Sequencer sequencer;
	Sequence sequence;
	Sequence mySequence = null;
	Track track;

	String[] instrumentNames = { "Bass Drum", "Closed Hi-Hat", "Open Hi-Hat", 
		"Acoustic Snare", "Crash Cymbal", "Hand Clap", "High Tom", "Hi Bongo", 
		"Maracas", "Whistle", "Low Conga", "Cowbell", "Vibraslap",
		"Low-mid Tom", "High Agogo", "Open Hi Conga"};
	int[] instruments = {35,42,46,38,49,39,50,60,70,72,64,56,58,47,67,63};



	public static void main (String[] args) {
		new BeatBoxFinal().startUp(args[0]); //args[0] is userID name
	}

	public void startup(String name) { 
		userName = name;
		// open connection to the server 
		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("couldn't connect - you can make awesome music alone.");
		}
		setUpMidi();
		buildGUI();
	}

	public void buildGUI() {
		theFrame = new JFrame("Michelle's BeatBox");
		theFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		BorderLayout layout = new BorderLayout();
		JPanel background = new JPanel(layout);
		background.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));

		checkboxList = new ArrayList<JCheckBox>();
		Box buttonBox = new Box(BoxLayout.Y_AXIS);

		JButton start = new JButton("Play");
		start.addActionListener(new MyStartListener());
		buttonBox.add(start);

		JButton stop = new JButton("Stop");
		stop.addActionListener(new MyStopListener());
		buttonBox.add(stop);

		JButton upTempo = new JButton("Faster");
		upTempo.addActionListener(new MyUpTempoListener());
		buttonBox.add(upTempo);

		JButton downTempo = new JButton("Slower");
		downTempo.addActionListener(new MyDownTempoListener());
		buttonBox.add(downTempo);

		JButton sendIt = new JButton("Send it!");
		sendIt.addActionListener(new MySendListener());
		buttonBox.add(sendIt);

		JButton saveIt = new JButton("Save it!");
		saveIt.addActionListener(new MySendListener());
		buttonBox.add(saveIt);

		userMessage = new JTextField();
		buttonBox.add(userMessage);

		// where incoming messages are display
		// select a msg to load and play attached beat pattern
		incomingList = new Jlist();
		incomingList.addListSelectionListener(new MyListSelectionListener());
		incomingList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		JScrollPane theList = new JScrollPane(incomingList);
		buttonBox.add(theList);
		incomingList.setListData(listVector); // no data to startwith 

		Box nameBox = new Box(BoxLayout.Y_AXIS);
		for (int i = 0; i<16; i++){
			nameBox.add(new Label(instrumentNames[i]));
		}

		background.add(BorderLayout.EAST, buttonBox);
		background.add(BorderLayout.WEST, nameBox);

		theFrame.getContentPane().add(background);
		GridLayout grid = new GridLayout(16,16);
		grid.setVgap(1);
		grid.setHgap(2);
		mainPanel = new JPanel(grid);
		background.add(BorderLayout.CENTER, mainPanel);

		for (int i = 0; i < 256; i++) {
			JCheckBox c = new JCheckBox();
			c.setSelected(false);
			checkboxList.add(c);
			mainPanel.add(c);
		}
		// setUpMidi();
		theFrame.setBounds(50,50,300,300);
		theFrame.pack();
		theFrame.setVisible(true);
	}

	public void setUpMidi() {
		try {
			sequencer = MidiSystem.getSequencer();
			sequencer.open();
			sequence = new Sequence(Sequence.PPQ,4);
			track = sequence.createTrack();
			sequencer.setTempoInBPM(120); 
		}
		catch (Exception e) {e.printStackTrace();}
	}

	// turn checkbox state into MIDI events and add to track
	public void buildTrackAndStart() {
		// int[] trackList = null;
		// make a 16 element array to hold values for one instrument, across
		// 16 beats
		sequence.deleteTrack(track);
		track = sequence.createTrack();
		// get rid of old track, make fresh

		for (int i = 0; i<16; i++) {
			// trackList = new int[16];
			trackList = new ArrayList<Integer>();
			// int key = instruments[i]; // represent each instrument

			for (int j = 0; j < 16; j++) {
				JCheckBox jc = (JCheckBox) checkboxList.get(j + (16*i));
				if (jc.isSelected()) {
					int key = instruments[i];
					trackList.add(key);
				} else {
					trackList.add(null); //keep this slot empty in track
				}
			}
			makeTracks(trackList);
			// track.add(makeEvent(176, 1, 127, 0, 16));
		}
		track.add(makeEvent(192,9,1,0,15));
		try {
			sequencer.setSequence(sequence);
			sequencer.setLoopCount(sequencer.LOOP_CONTINUOUSLY);
			sequencer.start();
			sequencer.setTempoInBPM(120);
		} catch (Exception e) {e.printStackTrace();}

	}

	// four inner classes listeners for buttons
	public class MyStartListener implements ActionListener {
		public void actionPerformed(ActionEvent a){
			buildTrackAndStart();
		}
	}
	public class MyStopListener implements ActionListener {
		public void actionPerformed(ActionEvent a){
			sequencer.stop();
		}
	}
	public class MyUpTempoListener implements ActionListener {
		public void actionPerformed(ActionEvent a){
			float tempoFactor = sequencer.getTempoFactor();
			sequencer.setTempoFactor((float) (tempoFactor * 1.1));
		}
	}
	public class MyDownTempoListener implements ActionListener {
		public void actionPerformed(ActionEvent a){
			float tempoFactor = sequencer.getTempoFactor();
			sequencer.setTempoFactor((float) (tempoFactor * 0.9));
		}
	}
	public class MySendListener implements ActionListener {
		public void actionPerformed(ActionEvent a){
			// make an alist of state of checkboxes
			boolean[] checkboxState = new boolean[256];
			for (int i = 0; i<256; i++) {
				JCheckBox check = (JCheckBox) checkboxList.get(i);
				if (check.isSelected()){
					checkboxState[i] = true;
				}
			}
			// serialize two objs (String and beat pattern) and write
			// those two obj to socket output stream (to server )
			String messageToSend = null; 
			try {
				out.writeObject(userName + nextNum++ + ": " + userMessage.getText());
				out.writeObject(checkboxState);
			}
			catch (Exception ex){
				System.out.println("Sorry! Something went wrong and your message didn't get to your buddy. Try again? ");

			}
			userMessage.setText("");
		}
	}

	public class MyListSelectionListener implements ListSelectionListener {
		// when user selects a message, immediately load beat pattern 
		public void valueChanged(ListSelectionEvent le) {
			if (!le.getValueIsAdjusting()){
				String selected = (String) incomingList.getSelectedValue();
				if (selected != null) {
					// now go to map, change sequence
					boolean[] selectedState = (boolean[]) otherSeqsMap.get(selected);
					changeSequence(selectedState);
					sequencer.stop();
					buildTrackAndStart();
				}
			}
		}
	}

	public class RemoteReader implements Runnable {
		// thread job!
		boolean[] checkboxState = null;
		String nameToShow = null;
		Object obj = null;
		public void run() {
			try {
				while ((obj=in.readObject()) != null){
					System.out.println("got an object from server!");
					String nameToShow = (String) obj;
					checkboxState = (boolean[]) in.readObject();
					otherSeqsMap.put(nameToShow, checkboxState);
					listVector.add(nameToShow);
					incomingList.setListData(listVector);
				}
			} catch (Exception ex) {ex.printStackTrace();}
		}
	} // close inner class

	public class MyPlayMineListener implements ActionListener {
		public void actionPerformed(ActionEvent a){
			if (mySequence != null) {
				sequence = mySequence; // retore to original 
			}
		}
	}

	public void changeSequence(boolean[] checkboxState){
		for (int i = 0; i <256; i++) {
			JCheckBox check = (JCheckBox) checkboxList.get(i);
			if (checkboxState[i]){
				check.setSelected(true);

			} else {
				check.setSelected(false);
			}
		}
	}

	// make events for one instrument at a time
	public void makeTracks(int[] list){
		Iterator it = list.iterator();
		for (int i= 0; i<16; i++) {
			Integer num = (Integer) it.next();
			if (num != null){
				int numKey = num.intValue();
				track.add(makeEvent(144,9,numKey,100,i));
				track.add(makeEvent(128,9,numKey,100,i+1));
				}
				// make NOTE ON and NOTE OFF events and add to track
		}
	}
	
	public MidiEvent makeEvent(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;
	}
}


=TERMINAL OUTPUT===============
$ javac BeatBoxFinal.java
BeatBoxFinal.java:42: cannot find symbol
symbol  : method startUp(java.lang.String)
location: class BeatBoxFinal
		new BeatBoxFinal().startUp(args[0]); //args[0] is userID name
		                  ^
BeatBoxFinal.java:100: cannot find symbol
symbol  : class Jlist
location: class BeatBoxFinal
		incomingList = new Jlist();
		                   ^
BeatBoxFinal.java:156: cannot find symbol
symbol  : variable trackList
location: class BeatBoxFinal
			trackList = new ArrayList<Integer>();
			^
BeatBoxFinal.java:163: cannot find symbol
symbol  : variable trackList
location: class BeatBoxFinal
					trackList.add(key);
					^
BeatBoxFinal.java:165: cannot find symbol
symbol  : variable trackList
location: class BeatBoxFinal
					trackList.add(null); //keep this slot empty in track
					^
BeatBoxFinal.java:168: cannot find symbol
symbol  : variable trackList
location: class BeatBoxFinal
			makeTracks(trackList);
			           ^
BeatBoxFinal.java:286: cannot find symbol
symbol  : method iterator()
location: class int[]
		Iterator it = list.iterator();
		                  ^
7 errors