Example usage for java.nio ByteBuffer wrap

List of usage examples for java.nio ByteBuffer wrap

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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 Bitmap byteArrayToBitmap(int width, int height, byte[] byteArray) {
    // use Bitmap.Config.ARGB_8888 instead of type is OK
    Bitmap stitchBmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    stitchBmp.copyPixelsFromBuffer(ByteBuffer.wrap(byteArray));
    return stitchBmp;
}

From source file:Main.java

public static String bytesToUuid(byte[] bytes) {
    ByteBuffer bb = ByteBuffer.wrap(bytes);
    bb.order(ByteOrder.LITTLE_ENDIAN);

    long lsb = bb.getLong();
    long msb = bb.getLong();
    UUID uuid = new UUID(msb, lsb);
    return uuidToString(uuid);
}

From source file:Main.java

public static Short byteArrayToShort(byte[] bytes) {
    if (bytes.length != (Short.SIZE / Byte.SIZE)) {
        throw new IllegalArgumentException("Incorrect array size to convert to a short");
    }/*from  w w  w  .ja va 2 s  .c  o m*/
    ByteBuffer buffer = ByteBuffer.wrap(bytes);
    buffer.order(ByteOrder.BIG_ENDIAN);
    return buffer.getShort();
}

From source file:Main.java

public static Short byteArrayToShortLE(byte[] bytes) {
    if (bytes.length != (Short.SIZE / Byte.SIZE)) {
        throw new IllegalArgumentException("Incorrect array size to convert to a short");
    }/*www  . j a  v a2 s  .  com*/
    ByteBuffer buffer = ByteBuffer.wrap(bytes);
    buffer.order(ByteOrder.LITTLE_ENDIAN);
    return buffer.getShort();
}

From source file:Main.java

/**
 * Generates a Base64 version of UUID/*from ww w. j  a  va2s  . com*/
 * @return a string in Base64 URL-safe format without padding at the end and no wrapping
 */
public static String randomUuidBase64() {
    UUID uuid = UUID.randomUUID();
    ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
    bb.putLong(uuid.getMostSignificantBits());
    bb.putLong(uuid.getLeastSignificantBits());
    return encodeUrlSafe64(bb.array());
}

From source file:Main.java

public static long ReadlittleEndianLong(InputStream dis) throws IOException {
    byte[] bytes = new byte[8];
    int re = dis.read(bytes);
    if (re == -1) {
        return -1;
    }/* ww  w.  jav a 2s.co m*/
    ByteBuffer bytebuffer = ByteBuffer.wrap(bytes);
    bytebuffer.order(ByteOrder.LITTLE_ENDIAN);
    long result = bytebuffer.getLong();
    return result;
}

From source file:Main.java

public static int byteArrayToInt(byte[] bytes) throws IllegalArgumentException {
    if (bytes.length != (Integer.SIZE / Byte.SIZE)) {
        throw new IllegalArgumentException("Incorrect array size to convert to an int");
    }// w w w  .j a v  a2s .  c o  m
    ByteBuffer buffer = ByteBuffer.wrap(bytes);
    buffer.order(ByteOrder.BIG_ENDIAN);
    return buffer.getInt();
}

From source file:Main.java

public static int byteArrayToIntLE(byte[] bytes) throws IllegalArgumentException {
    if (bytes.length != (Integer.SIZE / Byte.SIZE)) {
        throw new IllegalArgumentException("Incorrect array size to convert to an int");
    }/*from ww  w .  j av  a 2 s. c o  m*/
    ByteBuffer buffer = ByteBuffer.wrap(bytes);
    buffer.order(ByteOrder.LITTLE_ENDIAN);
    return buffer.getInt();
}

From source file:Main.java

public static boolean isPureAscii(String v) {
    byte bytearray[] = v.getBytes();
    CharsetDecoder d = Charset.forName("US-ASCII").newDecoder();
    try {//from   w  w  w  .j a  v  a2s. c om
        CharBuffer r = d.decode(ByteBuffer.wrap(bytearray));
        r.toString();
    } catch (CharacterCodingException e) {
        return false;
    }
    return true;
}

From source file:Main.java

private static void writeFileFromBytes(final File file, final byte[] bytes) {
    FileChannel fc = null;/*ww  w  . j  a va 2  s.  co  m*/
    try {
        fc = new FileOutputStream(file, false).getChannel();
        fc.write(ByteBuffer.wrap(bytes));
        fc.force(true);
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (fc != null) {
                fc.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}