[java]problem z Throws

public class Washer {
  Laundry laundry = new Laundry();
  public void foo() throws ClothingException {
  laundry.doLaundry();
}

public static void main (String[] args) throws ClothingException {
  Washer a = new Washer();
  a.foo();
}
}

Exception in thread "main" ClothingException
    at Washer.foo(Washer.java:15)
    at Washer.main(Washer.java:20)

Exception in thread "main" ClothingException
	at Washer.foo(Washer.java:15)
	at Washer.main(Washer.java:20)

jps

6398 Jps

import java.awt.*;
import javax.swing.*;
import javax.sound.midi.*;
import java.util.*;
import java.awt.event.*;

public class BeatBox {
	
	JPanel mainPanel;
	ArrayList<JCheckBox> checkboxList;
	Sequencer sequencer;
	Sequence sequence;
	Track track;
	JFrame theFrame;

	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 BeatBox().buildGUI();
	}
	
	public void buildGUI() {
		theFrame = new JFrame("Cyber 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("Start");
		start.addActionListener(new MyStartListener());
		buttonBox.add(start);
		
		JButton stop = new JButton("Stop");
		stop.addActionListener(new MyStopListener());
		buttonBox.add(stop);
		
		JButton upTempo = new JButton("Tempo Up");
		upTempo.addActionListener(new MyUpTempoListener());
		buttonBox.add(upTempo);
		
		JButton downTempo = new JButton("Tempo Down");
		
		downTempo.addActionListener(new MyDownTempoListener());
		buttonBox.add(downTempo);
		
		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);
		} // end loop
		
		setUpMidi();
		
		theFrame.setBounds(50,50,300,300);
		theFrame.pack();
		theFrame.setVisible(true);
		} // close method
		
		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();}
		} // close method
		
		public void buildTrackAndStart() {
			int[] trackList = null;
			
			sequence.deleteTrack(track);
			track = sequence.createTrack();
		
			for (int i = 0; i < 16; i++) {
				trackList = new int[16];
				
				int key = instruments[i];
				
				for (int j = 0; j < 16; j++ ) {
					
					JCheckBox jc = (JCheckBox) checkboxList.get(j + (16*i));
					if ( jc.isSelected()) {
						trackList[j] = key;
					} else {
						trackList[j] = 0;
					}
				} // close inner loop
				
				makeTracks(trackList);
				track.add(makeEvent(176,1,127,0,16));
			} // close outer
			
			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();}
		} // close buildTrackAndStart method
				
		public class MyStartListener implements ActionListener {
			public void actionPerformed(ActionEvent a) {
				buildTrackAndStart();
			}
		} // close inner class	
		
		public class MyStopListener implements ActionListener {
			public void actionPerformed(ActionEvent a) {
				sequencer.stop();
			}
		} // close inner class	
		
		public class MyUpTempoListener implements ActionListener {
			public void actionPerformed(ActionEvent a) {
				float tempoFactor = sequencer.getTempoFactor();
				sequencer.setTempoFactor((float)(tempoFactor * 1.03));
			}
		} // close inner class
		
		public class MyDownTempoListener implements ActionListener {
			public void actionPerformed(ActionEvent a) {
				float tempoFactor = sequencer.getTempoFactor();
				sequencer.setTempoFactor((float)(tempoFactor * .97));
			}
		} // close inner class
		
		
		
		public void makeTracks(int[] list) {
			
			for (int i = 0; i < 16; i++) {
				int key = list[i];
			
				if (key != 0) {
					track.add(makeEvent(144,9,key, 100, i));
					track.add(makeEvent(128,9,key, 100, i+1));
				}
			}
		}
		
		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;
		}
		
	} // close class