Example usage for java.nio IntBuffer get

Introduction

In this page you can find the example usage for java.nio IntBuffer get.

Prototype

public abstract int get(int index);

Source Link

Document

Returns an int at the specified index; the position is not changed.

Usage

From source file:Main.java

public static void main(String[] args) {
    IntBuffer bb = IntBuffer.allocate(10);
    bb.put(100);/*from   w  w w.  ja va2  s .  c  om*/

    bb.rewind();
    System.out.println(bb.get(0));

}

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From source file:MainClass.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.allocate(BSIZE);
    IntBuffer ib = bb.asIntBuffer();

    ib.put(new int[] { 1, 2, 7, 9, 3, 8, 6 });

    System.out.println(ib.get(3));
    ib.put(3, 1811);//from   w  w w.j a v a 2s.  co  m
    ib.rewind();
    while (ib.hasRemaining()) {
        int i = ib.get();
        if (i == 0)
            break; // Else we'll get the entire buffer
        System.out.println(i);
    }
}

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From source file:Main.java

public static void main(String[] args) {
    IntBuffer bb = IntBuffer.allocate(10);
    bb.put(100);//from   w  w  w.jav  a 2  s.c  o m

    bb.rewind();

    int[] intArray = new int[10];
    bb.get(intArray);

    System.out.println(Arrays.toString(intArray));

}

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From source file:MainClass.java

public static void main(String[] args) throws IOException {
    FileChannel fc = new RandomAccessFile(new File("temp.tmp"), "rw").getChannel();
    IntBuffer ib = fc.map(FileChannel.MapMode.READ_WRITE, 0, fc.size()).asIntBuffer();
    ib.put(0);//from  w w w .  j  av a2  s.  c  o  m
    for (int i = 1; i < 10; i++)
        ib.put(ib.get(i - 1));
    fc.close();

}

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From source file:IntBufferDemo.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.allocate(BSIZE);
    IntBuffer ib = bb.asIntBuffer();
    // Store an array of int:
    ib.put(new int[] { 11, 42, 47, 99, 143, 811, 1016 });
    // Absolute location read and write:
    System.out.println(ib.get(3));
    ib.put(3, 1811);/*from  w  w  w  . j av  a 2 s. com*/
    ib.rewind();
    while (ib.hasRemaining()) {
        int i = ib.get();
        if (i == 0)
            break; // Else we'll get the entire buffer
        System.out.println(i);
    }

}

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From source file:Main.java

static void scaleHalf(IntBuffer in, int w, int h, IntBuffer out, int rotate) {
    for (int i = 0; i < w / 2; ++i) {
        for (int j = 0; j < h / 2; ++j) {
            int k = w * 2 * j + 2 * i;
            int pixel00 = in.get(k);
            int pixel01 = in.get(k + 1);
            int pixel10 = in.get(k + w);
            int pixel11 = in.get(k + w + 1);

            if (rotate != 0) {
                pixel00 = Integer.rotateLeft(pixel00, rotate);
                pixel01 = Integer.rotateLeft(pixel01, rotate);
                pixel10 = Integer.rotateLeft(pixel10, rotate);
                pixel11 = Integer.rotateLeft(pixel11, rotate);
            }/* w w w. j  a v a 2  s  .c om*/

            int pixel = average4RGBA(pixel00, pixel01, pixel10, pixel11);

            if (rotate != 0) {
                pixel = Integer.rotateRight(pixel, rotate);
            }

            out.put(w / 2 * j + i, pixel);
        }
    }
}

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From source file:org.blockartistry.DynSurround.client.sound.SoundEngine.java

private static void configureSound() {
    int totalChannels = -1;

    try {//w w w .  ja v  a2s. co  m

        final boolean create = !AL.isCreated();
        if (create) {
            AL.create();
            alErrorCheck();
        }

        final IntBuffer ib = BufferUtils.createIntBuffer(1);
        ALC10.alcGetInteger(AL.getDevice(), ALC11.ALC_MONO_SOURCES, ib);
        alErrorCheck();
        totalChannels = ib.get(0);

        if (create)
            AL.destroy();

    } catch (final Throwable e) {
        e.printStackTrace();
    }

    int normalChannelCount = ModOptions.normalSoundChannelCount;
    int streamChannelCount = ModOptions.streamingSoundChannelCount;

    if (ModOptions.autoConfigureChannels && totalChannels > 64) {
        totalChannels = ((totalChannels + 1) * 3) / 4;
        streamChannelCount = Math.min(totalChannels / 5, MAX_STREAM_CHANNELS);
        normalChannelCount = totalChannels - streamChannelCount;
    }

    DSurround.log().info("Sound channels: %d normal, %d streaming (total avail: %s)", normalChannelCount,
            streamChannelCount, totalChannels == -1 ? "UNKNOWN" : Integer.toString(totalChannels));
    SoundSystemConfig.setNumberNormalChannels(normalChannelCount);
    SoundSystemConfig.setNumberStreamingChannels(streamChannelCount);

    // Setup sound buffering
    if (ModOptions.streamBufferCount != 0)
        SoundSystemConfig.setNumberStreamingBuffers(ModOptions.streamBufferCount);
    if (ModOptions.streamBufferSize != 0)
        SoundSystemConfig.setStreamingBufferSize(ModOptions.streamBufferSize * 1024);
    DSurround.log().info("Stream buffers: %d x %d", SoundSystemConfig.getNumberStreamingBuffers(),
            SoundSystemConfig.getStreamingBufferSize());
}

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From source file:VASSAL.tools.image.tilecache.TileUtils.java

/**
 * Reads an image tile./*  www  . j a va2s.c om*/
 *
 * @param in a stream containing the tile data
 * @return the tile image
 *
 * @throws IOException if the read fails
 */
public static BufferedImage read(InputStream in) throws IOException {
    ByteBuffer bb;

    // read the header
    final byte[] header = readHeader(in);
    bb = ByteBuffer.wrap(header);

    // validate the signature
    final byte[] sig = new byte[6];
    bb.get(sig);
    checkSignature(sig);

    // get the dimensions and type
    final int w = bb.getInt();
    final int h = bb.getInt();
    final int type = bb.getInt();

    // read the image data
    final byte[] cdata = IOUtils.toByteArray(in);

    // decompress the image data
    InputStream zin = null;
    try {
        zin = new GZIPInputStream(new ByteArrayInputStream(cdata));
        bb = ByteBuffer.wrap(IOUtils.toByteArray(zin));
        zin.close();
    } finally {
        IOUtils.closeQuietly(zin);
    }

    // build the image
    final BufferedImage img = new BufferedImage(w, h, type);

    // FIXME: This might decelerate the image? If so, then we should
    // make a copy.
    final DataBufferInt db = (DataBufferInt) img.getRaster().getDataBuffer();
    final int[] data = db.getData();

    final IntBuffer ib = bb.asIntBuffer();
    ib.get(data);

    /*
        if (ib.hasRemaining()) {
          // buffer contains garbage at the end!
          throw new IOException("found " + (4*ib.remaining()) + " more bytes!");
        }
    */

    return img;
}

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From source file:org.mrgeo.data.raster.RasterWritable.java

private static Raster read(final byte[] rasterBytes, Writable payload) throws IOException {
    WritableRaster raster;//from  w  w  w.j  a va 2s  .  co m

    final ByteBuffer rasterBuffer = ByteBuffer.wrap(rasterBytes);

    @SuppressWarnings("unused")
    final int headersize = rasterBuffer.getInt(); // this isn't really used anymore...
    final int height = rasterBuffer.getInt();
    final int width = rasterBuffer.getInt();
    final int bands = rasterBuffer.getInt();
    final int datatype = rasterBuffer.getInt();
    final SampleModelType sampleModelType = SampleModelType.values()[rasterBuffer.getInt()];

    SampleModel model;
    switch (sampleModelType) {
    case BANDED:
        model = new BandedSampleModel(datatype, width, height, bands);
        break;
    case MULTIPIXELPACKED:
        throw new NotImplementedException("MultiPixelPackedSampleModel not implemented yet");
        // model = new MultiPixelPackedSampleModel(dataType, w, h, numberOfBits)
    case PIXELINTERLEAVED: {
        final int pixelStride = rasterBuffer.getInt();
        final int scanlineStride = rasterBuffer.getInt();
        final int bandcnt = rasterBuffer.getInt();
        final int[] bandOffsets = new int[bandcnt];
        for (int i = 0; i < bandcnt; i++) {
            bandOffsets[i] = rasterBuffer.getInt();
        }
        model = new PixelInterleavedSampleModel(datatype, width, height, pixelStride, scanlineStride,
                bandOffsets);
        break;
    }
    case SINGLEPIXELPACKED:
        throw new NotImplementedException("SinglePixelPackedSampleModel not implemented yet");
        // model = new SinglePixelPackedSampleModel(dataType, w, h, bitMasks);
    case COMPONENT: {
        final int pixelStride = rasterBuffer.getInt();
        final int scanlineStride = rasterBuffer.getInt();
        final int bandcnt = rasterBuffer.getInt();
        final int[] bandOffsets = new int[bandcnt];
        for (int i = 0; i < bandcnt; i++) {
            bandOffsets[i] = rasterBuffer.getInt();
        }
        model = new ComponentSampleModel(datatype, width, height, pixelStride, scanlineStride, bandOffsets);
        break;
    }
    default:
        throw new RasterWritableException("Unknown RasterSampleModel type");
    }

    // include the header size param in the count
    int startdata = rasterBuffer.position();

    // calculate the data size
    int[] samplesize = model.getSampleSize();
    int samplebytes = 0;
    for (int ss : samplesize) {
        // bits to bytes
        samplebytes += (ss / 8);
    }
    int databytes = model.getHeight() * model.getWidth() * samplebytes;

    // final ByteBuffer rasterBuffer = ByteBuffer.wrap(rasterBytes, headerbytes, databytes);
    // the corner of the raster is always 0,0
    raster = Raster.createWritableRaster(model, null);

    switch (datatype) {
    case DataBuffer.TYPE_BYTE: {
        // we can't use the byte buffer explicitly because the header info is
        // still in it...
        final byte[] bytedata = new byte[databytes];
        rasterBuffer.get(bytedata);

        raster.setDataElements(0, 0, width, height, bytedata);
        break;
    }
    case DataBuffer.TYPE_FLOAT: {
        final FloatBuffer floatbuff = rasterBuffer.asFloatBuffer();
        final float[] floatdata = new float[databytes / RasterUtils.FLOAT_BYTES];

        floatbuff.get(floatdata);

        raster.setDataElements(0, 0, width, height, floatdata);
        break;
    }
    case DataBuffer.TYPE_DOUBLE: {
        final DoubleBuffer doublebuff = rasterBuffer.asDoubleBuffer();
        final double[] doubledata = new double[databytes / RasterUtils.DOUBLE_BYTES];

        doublebuff.get(doubledata);

        raster.setDataElements(0, 0, width, height, doubledata);

        break;
    }
    case DataBuffer.TYPE_INT: {
        final IntBuffer intbuff = rasterBuffer.asIntBuffer();
        final int[] intdata = new int[databytes / RasterUtils.INT_BYTES];

        intbuff.get(intdata);

        raster.setDataElements(0, 0, width, height, intdata);

        break;
    }
    case DataBuffer.TYPE_SHORT:
    case DataBuffer.TYPE_USHORT: {
        final ShortBuffer shortbuff = rasterBuffer.asShortBuffer();
        final short[] shortdata = new short[databytes / RasterUtils.SHORT_BYTES];
        shortbuff.get(shortdata);
        raster.setDataElements(0, 0, width, height, shortdata);
        break;
    }
    default:
        throw new RasterWritableException("Error trying to read raster.  Bad raster data type");
    }

    // should we even try to extract the payload?
    if (payload != null) {
        // test to see if this is a raster with a possible payload
        final int payloadStart = startdata + databytes;
        if (rasterBytes.length > payloadStart) {
            // extract the payload
            final ByteArrayInputStream bais = new ByteArrayInputStream(rasterBytes, payloadStart,
                    rasterBytes.length - payloadStart);
            final DataInputStream dis = new DataInputStream(bais);
            payload.readFields(dis);
        }
    }
    return raster;
}

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From source file:edu.iu.daal_pca.Service.java

public static void printAprioriRules(HomogenNumericTable leftItemsTable, HomogenNumericTable rightItemsTable,
        HomogenNumericTable confidenceTable) {
    int nRulesToPrint = 20;
    /* Get sizes of tables to store association rules */
    int nLeftItems = (int) leftItemsTable.getNumberOfRows();
    int nRightItems = (int) rightItemsTable.getNumberOfRows();
    int nRules = (int) confidenceTable.getNumberOfRows();

    /* Get association rules data */

    IntBuffer bufLeftItems = IntBuffer.allocate(nLeftItems * (int) leftItemsTable.getNumberOfColumns());
    bufLeftItems = leftItemsTable.getBlockOfRows(0, nLeftItems, bufLeftItems);
    int[] leftItems = new int[bufLeftItems.capacity()];
    bufLeftItems.get(leftItems);

    IntBuffer bufRightItems = IntBuffer.allocate(nRightItems * (int) rightItemsTable.getNumberOfColumns());
    bufRightItems = rightItemsTable.getBlockOfRows(0, nRightItems, bufRightItems);
    int[] rightItems = new int[bufRightItems.capacity()];
    bufRightItems.get(rightItems);/*from www.j a  v a  2s  .  c  o  m*/

    double[] confidence = confidenceTable.getDoubleArray();

    ArrayList<ArrayList<Integer>> leftItemsVector = new ArrayList<ArrayList<Integer>>(nRules);
    for (int i = 0; i < nRules; i++) {
        leftItemsVector.add(new ArrayList<Integer>());
    }

    if (nRules == 0) {
        System.out.println("No association rules were found ");
        return;
    }

    for (int i = 0; i < nLeftItems; i++) {
        leftItemsVector.get((leftItems[2 * i])).add(leftItems[2 * i + 1]);
    }

    ArrayList<ArrayList<Integer>> rightItemsVector = new ArrayList<ArrayList<Integer>>(nRules);
    for (int i = 0; i < nRules; i++) {
        rightItemsVector.add(new ArrayList<Integer>());
    }

    for (int i = 0; i < nRightItems; i++) {
        rightItemsVector.get((rightItems[2 * i])).add(rightItems[2 * i + 1]);
    }

    ArrayList<Double> confidenceVector = new ArrayList<Double>(nRules);
    for (int i = 0; i < nRules; i++) {
        confidenceVector.add(confidence[i]);
    }

    System.out.println("Last " + nRulesToPrint + " association rules: ");
    System.out.println("Rule" + "\t\t\t\tConfidence");

    int iMin = ((nRules > nRulesToPrint) ? (nRules - nRulesToPrint) : 0);
    for (int i = iMin; i < nRules; i++) {
        System.out.print("{");
        for (int l = 0; l < leftItemsVector.get(i).size() - 1; l++) {
            System.out.print(leftItemsVector.get(i).get(l) + ", ");
        }
        System.out.print(leftItemsVector.get(i).get(leftItemsVector.get(i).size() - 1) + "} => {");

        for (int l = 0; l < rightItemsVector.get(i).size() - 1; l++) {
            System.out.print(rightItemsVector.get(i).get(l) + ", ");
        }
        System.out.print(rightItemsVector.get(i).get(rightItemsVector.get(i).size() - 1) + "}\t\t");

        System.out.println(confidenceVector.get(i));
    }
}

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