Java 在这段代码中，数组在哪里超出了边界？

我是Java新手，我遇到了这个错误，我可以设法理解它是从哪里来的。我在做FFT分析，我得到一个错误：

java.lang.ArrayIndexOutOfBoundsException: 66,
at DrawingFunction.main(DrawingFunction.java:66)
at AnimationGen.begin(AnimationGen.java:54)
at FFTclass.main2(FFTclass.java:213)
at fftTry.main(fftTry.java:34)

fftTry的代码如下所示：

public static void main(String[] args) {


    final String NEWLINE = "\n";

    String inputFile = "C:/Users/USER/Downloads/DD.wav"; // Place the wav file in the top level directory, ie S:/input.wav


    File fileLocation = new File(inputFile);

    System.out.println("START");
    try {

        double[] complexNumber = readFully(fileLocation);
        System.out.println(NEWLINE + "Read file");

        double[] realPart = complexNumber;
        double[] imagPart = new double[realPart.length];
        System.out.println("Length = " + realPart.length);

        FFTclass FFT = new FFTclass(1024);
        FFT.main2(realPart,imagPart,1024);

        //for (int i = 0; i < complexNumber.length; ++i) {
        //    System.out.println(complexNumber[i]);
        //}

    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

static double[] readFully(File file) throws UnsupportedAudioFileException, IOException {
    AudioInputStream in = AudioSystem.getAudioInputStream(file);
    AudioFormat fmt = in.getFormat();
    double sampleRate = fmt.getSampleRate();
    double frameSize = fmt.getFrameSize();
    double auidioDuration = fmt.getFrameRate();
    double channels = fmt.getChannels();
    System.out.println("File length = " + file.length() + " ");
    System.out.println("Sample Rate = " + sampleRate + " per second");
    System.out.println("Frame size = " + frameSize + " per second");
    System.out.println("Frame rate = " + auidioDuration + " per second");
    System.out.println("Channels = " + channels);
    System.out.println("Length in time = " + (file.length()/frameSize * auidioDuration) + " seconds");
    System.out.println("Length in time in minutes = " + (int)(file.length()/(frameSize* auidioDuration *60)) + " minutes and " + ( (file.length()/(frameSize* auidioDuration *60))- (int)(file.length()/(frameSize* auidioDuration *60)) )* 60 + " seconds");

    byte[] bytes;
    try {
        if (fmt.getEncoding() != Encoding.PCM_SIGNED) {
            throw new UnsupportedAudioFileException();
        }

        // read the data fully
        bytes = new byte[in.available()];
        in.read(bytes);
    } finally {
        in.close();
    }

    int bits = fmt.getSampleSizeInBits();
    double max = Math.pow(2, bits - 1);

    ByteBuffer bb = ByteBuffer.wrap(bytes);
    bb.order(fmt.isBigEndian() ?
            ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN);

    double[] samples = new double[bytes.length * 8 / bits];
    // convert sample-by-sample to a scale of
    // -1.0 <= samples[i] < 1.0
    for (int i = 0; i < samples.length; ++i) {
        switch (bits) {
            case 8:
                samples[i] = (bb.get() / max);
                break;
            case 16:
                samples[i] = (bb.getShort() / max);
                break;
            case 32:
                samples[i] = (bb.getInt() / max);
                break;
            case 64:
                samples[i] = (bb.getLong() / max);
                break;
            default:
                throw new UnsupportedAudioFileException();
        }
    }

    return samples;


}

publicstaticvoidmain（字符串[]args）{
最后一个字符串换行符=“\n”；
String inputFile=“C:/Users/USER/Downloads/DD.wav”；//将wav文件放在顶级目录中，即S:/input.wav
文件文件位置=新文件（inputFile）；
系统输出打印项次（“开始”）；
试一试{
double[]complexNumber=readfull（文件位置）；
System.out.println（换行符+读取文件）；
double[]realPart=complexNumber；
double[]imagPart=新的double[realPart.length]；
System.out.println（“Length=“+realPart.Length”）；
FFTclass FFT=新的FFTclass（1024）；
FFT.main2（realPart，imagPart，1024）；
//对于（int i=0；i//-1.0我将在这里查看这些行：

double xPoint[][][] = new double[value][fps][64];

//...

for (int j = 0; j < (44100 / fps); j += ((44100 / fps) / 64)) {
    xPoint[counter][i][j] = magnitude[counter][i][j];

double-xPoint[][]=new-double[value][fps][64]；
//...
对于（整数j=0；j<（44100/fps）；j+=（（44100/fps）/64））{
xPoint[counter][i][j]=震级[counter][i][j]；

请注意，输入的fps是30，因此（（44100/30）/64））=22.96875（或作为int的22）。因此，当该循环迭代时，j将如下所示：


j=0

j=22

j=44

j=66（数组超出范围）

fps的值是30（如果我没有遗漏任何内容的话）。44100/fps=1470。因此，j从0变为1469。但是，数组的第三维度只有64

double xPoint[][][] = new double[value][fps][64];
double yPoint[][][] = new double[value][fps][64];
for (int counter = 0; counter < value; counter++) {



        for (int i = 0; i < fps; i++) {
            for (int j = 0; j < (44100 / fps); j += ((44100 / fps) / 64)) {

            xPoint[counter][i][j] = magnitude[counter][i][j];

double-xPoint[][]=new-double[value][fps][64]；
双Y点[][]]=新的双[值][fps][64]；
用于（int计数器=0；计数器<值；计数器++）{
对于（int i=0；i
你能准确地显示它是哪一行吗？我的猜测是
j>=64
，但在不知道是哪一行的情况下，我无法告诉你导致错误的确切部分。堆栈跟踪会准确地告诉你问题出在哪里。@mustaccio如果你跟我说话，我太懒了，无法在这里数行。“在这段代码中，数组在哪里超出了边界？”在
DrawingFunction.java
中的第66行，以哪一行为准（我们看不到行号）。
public int second = 0;
Timer t = new Timer();
TimerTask timeTask = new TimerTask() {
    @Override
    public void run() {
        second++;
    }
};

public double addingAngle = 0;

public int frameWidth = 1920;
public int frameHeigth = 1080;

public int value;
public int fps;

public double[][][] magnitude;


double xPoint[][][];
double yPoint[][][];


public void main(int value, int fps, double[][][] magnitude) {


    this.value = value;
    this.fps = fps;
    this.magnitude = magnitude;




    ///////////////////////////////////////////////////////////////////////////////////////////////////
    double xPoint[][][] = new double[value][fps][64];
    double yPoint[][][] = new double[value][fps][64];
    for (int counter = 0; counter < value; counter++) {



        for (int i = 0; i < fps; i++) {
            for (int j = 0; j < (44100 / fps); j += ((44100 / fps) / 64)) {

                xPoint[counter][i][j] = magnitude[counter][i][j];

                for (int t = 0; t < ((44100 / fps) / 65); t++) { //64 is the number of bands taken into and only 55 from them are used
                    if(j+t < magnitude[0][0].length) {
                        xPoint[counter][i][j] += magnitude[counter][i][j + t];
                    }
                    System.out.println("Here xPoint[" +i+"]["+j+"]" + (j + t));

                }

                xPoint[counter][i][j] /= (int) ((44100 / fps) / 64);
            }

            int t = 0;
            for (double angle = addingAngle; angle < 2 * Math.PI + addingAngle; angle += 2 * Math.PI / 55) {

                xPoint[counter][i][t] *= Math.cos(angle); //All X points [second][frame][band]
                yPoint[counter][i][t] *= Math.sin(angle); //All Y points [second][frame][band]
                t++;
            }
            addingAngle += Math.PI / 110; //110 = 55 points * 2 so rotation is slower
        }

        this.xPoint = xPoint;
        this.yPoint = yPoint;

        // Up to here we have 64 xPoints and 64 yPoints, but only the first 55 of each are multiplied by the angle


        // jl.setIcon(new ImageIcon("/images/T.png"));



    }
    for (int i = 0; i < 55; i++) {
        System.out.println("Point[" + i + "] is: " + xPoint[0][0][i]);
    }

    ///////////////////////////////////////////////////////////////////////////////////////////////////



    JFrame window = new JFrame();
    window.add(new DrawingFunction());
    window.pack();
    window.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    window.setLocationRelativeTo(null);
    window.setSize(frameWidth, frameHeigth);
    window.setBackground(Color.blue);
    window.setVisible(true);
    repaint();
}

@Override
protected void paintComponent(Graphics g) {
    g.setColor(Color.black);
    g.fillRect(800, 500, 300, 300);        //g.translate(frameWidth/2, frameHeigth/2);


    Polygon p = new Polygon();
    for (int i = 0; i < 55; i++)
        p.addPoint(15 * (int) xPoint[0][0][i], 15 * (int) yPoint[0][0][i]);

    g.setColor(Color.black);
    g.drawPolygon(p);
    g.fillRect(800, 800, 400, 400);
    validate(); // So image appears even if screen is small

double xPoint[][][] = new double[value][fps][64];

//...

for (int j = 0; j < (44100 / fps); j += ((44100 / fps) / 64)) {
    xPoint[counter][i][j] = magnitude[counter][i][j];

double xPoint[][][] = new double[value][fps][64];
double yPoint[][][] = new double[value][fps][64];
for (int counter = 0; counter < value; counter++) {



        for (int i = 0; i < fps; i++) {
            for (int j = 0; j < (44100 / fps); j += ((44100 / fps) / 64)) {

            xPoint[counter][i][j] = magnitude[counter][i][j];