Java Utililty Methods ByteBuffer Write

List of utility methods to do ByteBuffer Write

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Description

The list of methods to do ByteBuffer Write are organized into topic(s).

Method

voidwriteFully(WritableByteChannel bc, ByteBuffer buf)
Write a ByteBuffer to a WritableByteChannel, handling short writes. 
do {
    bc.write(buf);
} while (buf.remaining() > 0);
longwriteFully(WritableByteChannel channel, ByteBuffer[] srcs)
write Fully 
long totalBytes = remaining(srcs);
long bytesToWrite = totalBytes;
long bytesWritten;
do {
    bytesWritten = write(channel, srcs);
    bytesToWrite -= bytesWritten;
} while (bytesToWrite > 0);
return totalBytes;
...
voidwriteHalf(final ByteBuffer buf, final int value)
write Half 
putUnsignedByte(buf, value >> 0);
putUnsignedByte(buf, value >> 8);
voidwriteHeader(int type, ByteBuffer lengthBuffer, ByteBuffer buffer)
write Header 
buffer.put((byte) type);
buffer.put(lengthBuffer);
voidwriteHeaderAndLsd(ByteBuffer out, int width, int height, boolean hasGct, int gctSize)
write Header And Lsd 
verifyRemaining(out, HEADER_LENGTH);
verifyShortValues(width, height);
out.put((byte) 0x47).put((byte) 0x49).put((byte) 0x46);
out.put((byte) 0x38).put((byte) 0x39).put((byte) 0x61);
out.putShort((short) width);
out.putShort((short) height);
byte gctFlag = (byte) ((hasGct ? 1 : 0) << 7);
byte colorResolution = 1 << 5;
...
voidwriteHexString(ByteBuffer buffer, String hex)
write Hex String 
byte[] bytes = hexStringToBytes(hex);
for (int i = bytes.length - 1; i >= 0; i--) {
    buffer.put(bytes[i]);
voidwriteHexString(ByteBuffer buffer, String hexStr)
Writes a sequence of hexidecimal values into the given buffer, where every two characters represent one byte value. 
char[] hexChars = hexStr.toCharArray();
if ((hexChars.length % 2) != 0) {
    throw new IOException("Hex string length must be even");
for (int i = 0; i < hexChars.length; i += 2) {
    String tmpStr = new String(hexChars, i, 2);
    buffer.put((byte) Long.parseLong(tmpStr, 16));
voidwriteImageDescriptor(ByteBuffer out, int imageLeft, int imageTop, int imageWidth, int imageHeight, boolean hasLct, int numColors)
write Image Descriptor 
verifyRemaining(out, IMAGE_DESCRIPTOR_LENGTH);
verifyShortValues(imageLeft, imageTop, imageWidth, imageHeight);
final byte packed;
if (hasLct) {
    int size = log2(numColors) - 1;
    packed = (byte) (0x80 | size);
} else {
    packed = 0x00;
...
voidwriteInt(ByteBuffer buf, int pos, int v)
Writes a specific integer value (4 bytes) to the output byte buffer at the given offset. 
buf.put(pos++, (byte) (0xff & (v >> 24)));
buf.put(pos++, (byte) (0xff & (v >> 16)));
buf.put(pos++, (byte) (0xff & (v >> 8)));
buf.put(pos, (byte) (0xff & v));
voidwriteInt(ByteBuffer logBuf, int i)
Write an int into the log. 
byte b = (byte) ((i >> 0) & 0xff);
logBuf.put(b);
b = (byte) ((i >> 8) & 0xff);
logBuf.put(b);
b = (byte) ((i >> 16) & 0xff);
logBuf.put(b);
b = (byte) ((i >> 24) & 0xff);
logBuf.put(b);
...