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

/**
 * Convert from array of byte to array of short.
 * @param byteArray byte array// w  ww  .  j  a v a 2  s . co m
 * @return short array
 */
public static short[] byteToShort(final byte[] byteArray) {
    short[] shortOut = new short[byteArray.length / 2];
    ByteBuffer byteBuffer = ByteBuffer.wrap(byteArray);
    byteBuffer.order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().get(shortOut);
    return shortOut;
}

From source file:Main.java

public static int byteArrayCompare(byte[] byte1, byte[] byte2) {
    byte[] tByte1 = new byte[byte2.length];

    ByteArrayInputStream input = new ByteArrayInputStream(byte1);

    try {//from w  w  w .  j  a  v  a  2s . c  o  m
        input.read(tByte1);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    ByteBuffer byteBuf1 = ByteBuffer.wrap(tByte1);
    ByteBuffer byteBuf2 = ByteBuffer.wrap(byte2);

    return byteBuf1.compareTo(byteBuf2);
}

From source file:Main.java

public static ByteBuffer getDataBuffer() {
    String lineSeparator = System.getProperty("line.separator");

    StringBuilder sb = new StringBuilder();
    sb.append("test");
    sb.append(lineSeparator);//from   ww  w .  ja va2  s .c om

    String str = sb.toString();
    Charset cs = Charset.forName("UTF-8");
    ByteBuffer bb = ByteBuffer.wrap(str.getBytes(cs));

    return bb;
}

From source file:Main.java

private static void receive(Map<Integer, byte[]> map, DatagramSocket socket, int[] length) {
    byte[] b = new byte[limit + 4];
    DatagramPacket p = new DatagramPacket(b, b.length);
    try {/*from www.  ja v a2s.  c  o m*/
        socket.receive(p);
    } catch (IOException ex) {
        ex.printStackTrace();
    }
    if (p.getLength() != 0) {
        ByteBuffer buf = ByteBuffer.wrap(b);
        int key = buf.getInt();
        byte[] bytes = new byte[p.getLength() - 4];
        length[0] += bytes.length;
        buf.get(bytes);
        map.put(key, bytes);
        receive(map, socket, length);
    }
}

From source file:Main.java

private static IntBuffer getImageAsARGBIntBuffer(BufferedImage image) {
    DataBuffer buffer = image.getRaster().getDataBuffer();

    if (buffer instanceof DataBufferInt) {
        return IntBuffer.wrap(((DataBufferInt) buffer).getData());
    } else if (buffer instanceof DataBufferByte) {
        return ByteBuffer.wrap(((DataBufferByte) buffer).getData()).order(ByteOrder.BIG_ENDIAN).asIntBuffer();
    } else {/*from w w  w  .ja v a  2 s  .c o  m*/
        int width = image.getWidth();
        int height = image.getHeight();
        int[] pixels = new int[width * height];
        image.getRGB(0, 0, width, height, pixels, 0, width);
        return IntBuffer.wrap(pixels);
    }
}

From source file:Main.java

public static String stripNonASCII(String ret) {
    char[] chars = ret.toCharArray();
    CharsetDecoder d = Charset.forName("US-ASCII").newDecoder();
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < chars.length; i++) {
        try {// w w w  . ja va2s .c  om
            char c = chars[i];
            String letter = new String(new char[] { c });
            byte bytearray[] = letter.getBytes();
            CharBuffer r = d.decode(ByteBuffer.wrap(bytearray));
            r.toString();
            sb.append(c);
        } catch (CharacterCodingException e) {

        }
    }
    return sb.toString();
}

From source file:com.hengyi.japp.tools.UuidUtils.java

protected static String base64Uuid(UUID uuid) {
    ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
    bb.putLong(uuid.getMostSignificantBits());
    bb.putLong(uuid.getLeastSignificantBits());
    return Base64.encodeBase64URLSafeString(bb.array());
}

From source file:Main.java

/**
 * Converts the given byte array, which is expected to contain the UUID, into a UUID instance.
 *
 * @param byteArray The byte array containing the UUID.
 * @return A newly created UUID instance or null in case of a failure.
 *//*from   w  ww.  ja va 2  s  .c om*/
public static UUID byteArrayToUuid(byte[] byteArray) {
    if (byteArray != null && byteArray.length >= UUID_LENGTH_IN_BYTES) {
        ByteBuffer byteBuffer = ByteBuffer.wrap(byteArray);
        long mostSignificantBits = byteBuffer.getLong();
        long leastSignificantBits = byteBuffer.getLong();
        return new UUID(mostSignificantBits, leastSignificantBits);
    }

    return null;
}

From source file:Main.java

private static String formatBytes(byte[] data, boolean unsigned) {
    ByteBuffer bb = ByteBuffer.wrap(data);

    StringBuilder sb = new StringBuilder(bb.capacity() * 3);

    while (bb.remaining() > 0) {
        if (unsigned) {
            sb.append(bb.get() & 0xff);
        } else {//from w w  w  .  j a  v  a 2  s .com
            sb.append(bb.get());
        }

        sb.append(',');
        sb.append('\n');
    }

    return sb.toString();
}

From source file:Main.java

public static ByteBuffer jsonToByteBuffer(JSONObject jsonObj) {
    return ByteBuffer.wrap(jsonObj.toString().getBytes(Charset.defaultCharset()));
}