Example usage for java.nio ByteBuffer wrap

Introduction

In this page you can find the example usage for java.nio ByteBuffer wrap.

Prototype

public static ByteBuffer wrap(byte[] array)

Source Link

Document

Creates a new byte buffer by wrapping the given byte array.

Usage

From source file:Main.java

public static float[] byteToFloatArrayBigEndian(byte[] data) {
    float[] floats = new float[data.length / BYTES_PER_FLOAT];
    ByteBuffer.wrap(data).order(ByteOrder.BIG_ENDIAN).asFloatBuffer().get(floats);
    return floats;
}

From source file:Main.java

public static byte[] long2bytearray(long l) {
    //TODO optimize with needing to create a ByteBuffer object

    byte b[] = new byte[8];

    ByteBuffer buf = ByteBuffer.wrap(b);
    buf.putLong(l);/*from   w ww  . j a v  a2 s  .c  o m*/
    return b;
}

From source file:Main.java

private static String decode(Charset charset, byte[] b) {
    if (b == null) {
        return null;
    }/*w w w. j ava 2 s  .  c  o m*/
    final CharBuffer cb = charset.decode(ByteBuffer.wrap(b));
    return new String(cb.array(), 0, cb.length());
}

From source file:Main.java

public static byte[] downSample(final byte[] data) {
    final byte[] output = new byte[data.length / 2];
    int length = data.length;
    ByteBuffer bb = ByteBuffer.wrap(data);
    bb.order(ByteOrder.LITTLE_ENDIAN);
    for (int i = 0; i < length; i += 2) {
        output[i / 2] = (byte) (((bb.getShort() * 128.0) / 32768.0) + 128.0);
    }/*from   w  w  w  .  j  ava2 s .c om*/
    return output;
}

From source file:Main.java

public static int byteArrayToShort(byte[] bytes, int offset) {
    ByteBuffer bb = ByteBuffer.wrap(bytes);
    bb.order(ByteOrder.LITTLE_ENDIAN);
    return bb.getShort(offset);
}

From source file:Main.java

public static int byteArrayToInt(byte[] bytes, int offset) {
    ByteBuffer bb = ByteBuffer.wrap(bytes);
    bb.order(ByteOrder.LITTLE_ENDIAN);
    return bb.getInt(offset);
}

From source file:Main.java

public static int readInt(InputStream inputStream) throws IOException {
    byte[] bytesToRead = new byte[4];
    inputStream.read(bytesToRead);/*from   w  ww .ja  v a2  s. c  om*/

    ByteBuffer buffer = ByteBuffer.wrap(bytesToRead);
    buffer.order(ByteOrder.LITTLE_ENDIAN);

    return buffer.getInt();
}

From source file:Main.java

public static String readMAString(ByteBuffer in) {
    int tmp = in.getInt();
    byte[] dst = new byte[tmp];
    in.get(dst);/*w ww.ja  v  a  2 s.  com*/
    String ret = Charset.forName("UTF-8").decode(ByteBuffer.wrap(dst)).toString();
    return ret;
}

From source file:Main.java

public static float toFloatEx(byte[] b, int pos) {
    try {//from  w  w  w.j  a  v  a  2  s  . c  om
        byte[] byteTmp = new byte[4];
        for (int i = 0; i < 4; i++) {
            byteTmp[i] = b[pos + i];
        }
        ByteBuffer bb = ByteBuffer.wrap(byteTmp);

        FloatBuffer fb = bb.asFloatBuffer();

        return fb.get();
    } catch (Exception e) {
        e.printStackTrace();
        return 0.0f;
    }

}

From source file:Main.java

public static String readFile(String path, Charset encoding) throws IOException {
    byte[] encoded = Files.readAllBytes(Paths.get(path));
    return encoding.decode(ByteBuffer.wrap(encoded)).toString();
}