求助了～这个程序运行的时候说 main里的数组越界～请高手帮忙看看，还有必须用-Xlint才能编译，为啥呢？小弟感激不尽

import java.io.*;
import java.net.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.sound.midi.*;
import javax.swing.event.*;public class BeatBox{ JFrame frame; 
JPanel panel;
JList  incomingList;
JTextField userMessege;
ArrayList<JCheckBox> checkboxList;
int nextNum;
Vector<String> listVector = new Vector<String>();
String userName;
ObjectOutputStream out;
ObjectInputStream in;
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 BeatBox().startUp(args[0]);
}
/*
*网络连接部分
*/ public void startUp(String name){
userName = name;//打开到服务器的连接
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("服务器无法连接");
}
setUpMidi();
buildGUI();
}
/*
*GUI部分
*/
public void buildGUI(){
frame = new JFrame("Cyber BeatBox");
BorderLayout layout = new BorderLayout();//API
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 ("开始");
start.addActionListener(new MyStartListener());
buttonBox.add(start);

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

JButton up = new JButton ("节奏加快");
up.addActionListener(new MyupListener());
buttonBox.add(up);

JButton down = new JButton ("节奏变慢");
down.addActionListener(new MydownListener());
buttonBox.add(down);

JButton sendIt = new JButton("发送节奏");
sendIt.addActionListener(new MysendListener());
buttonBox.add(sendIt);

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

incomingList = new JList();
incomingList.addListSelectionListener(new MyListSelectionListener());
incomingList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
JScrollPane theList = new JScrollPane(incomingList);
buttonBox.add(theList);
incomingList.setListData(listVector);   //API when it begin their has no data.

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);

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

for(int i=0;i<256;i++){
JCheckBox c = new JCheckBox();
c.setSelected(false);
checkboxList.add(c);
panel.add(c);
}
 frame.setBounds(50,50,300,300);
 frame.pack();
 frame.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();}}
public void buildTrackAndStart(){   //653//
ArrayList<Integer> trackList = null;
sequence.deleteTrack(track);
track = sequence.createTrack();

for(int i = 0;i < 16;i++){

trackList = new ArrayList<Integer>();

for(int j=0;j<16;j++){
JCheckBox jc = (JCheckBox) checkboxList.get(j + (16*i));
if(jc.isSelected()){
int key = instruments[i];
trackList.add(new Integer(key));
}else{
trackList.add(null);
}
}
makeTracks(trackList);
}
track.add(makeEvent(192,9,1,0,15));
try{
Sequencer player = MidiSystem.getSequencer();
player.open();
Sequence seq = new Sequence(Sequence.PPQ,4);

Track track = seq.createTrack();

ShortMessage a = new ShortMessage();
a.setMessage(144,1,44,100);
MidiEvent noteOn = new MidiEvent(a,1);
sequencer.setSequence(sequence);
sequencer.setLoopCount(sequencer.LOOP_CONTINUOUSLY);
sequencer.start();
sequencer.setTempoInBPM(120);
}catch(Exception e){e.printStackTrace();}
}
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 MyupListener implements ActionListener{
public void actionPerformed(ActionEvent a){
float tem = sequencer.getTempoFactor();
sequencer.setTempoFactor((float)(tem*1.03));
}
}public class MydownListener implements ActionListener{
public void actionPerformed(ActionEvent a){
float tem = sequencer.getTempoFactor();
sequencer.setTempoFactor((float)(tem*.97));
}
}public class MysendListener implements ActionListener{
public void actionPerformed(ActionEvent a){
//制作一个保存音乐信息的数组
boolean[] checkBoxState = new boolean[256];
for(int i=0;i<256;i++){
JCheckBox check = (JCheckBox) checkboxList.get(i);
if(check.isSelected()){
checkBoxState[i] = true;
}
}
String messegeTosend = null;
try{
out.writeObject(userName + nextNum++ +":" + userMessege.getText());
out.writeObject(checkBoxState);
}catch(Exception ex){
System.out.println("对不起，暂时无法发送到服务器");
}
userMessege.setText("");
}
}
public class  MyListSelectionListener implements ListSelectionListener{
public void valueChanged(ListSelectionEvent le){
if(!le.getValueIsAdjusting()){
String selected = (String) incomingList.getSelectedValue();
if(selected !=null){
boolean[] selectedState = (boolean[]) otherSeqsMap.get(selected);
changeSequence(selectedState);
sequencer.stop();
buildTrackAndStart();
}
}
}
}
public class RemoteReader implements Runnable{
boolean[] checkboxState = null;
String nameToShow = null;
Object obj = null;
public void run(){
try{
while((obj=in.readObject())!=null){
System.out.println("从服务器得到信息");
System.out.println(obj.getClass());
String nameToShow = (String)obj;
checkboxState = (boolean[]) in.readObject();
otherSeqsMap.put(nameToShow,checkboxState);
listVector.add(nameToShow);
incomingList.setListData(listVector);
}
}catch(Exception ex){ex.printStackTrace();}
}
}
public class MyPlayMineListener implements ActionListener{
public void actionPerformed(ActionEvent a){
if(mySequence != null){
sequence = mySequence;
}
}
}
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);
}
}
}
public void makeTracks(ArrayList 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));
}
}
}
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){ }
return event;
}
}
自己照着书上写的 也不知道哪里不对。。