Java Utililty Methods File Read via ByteBuffer

List of utility methods to do File Read via ByteBuffer

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Description

The list of methods to do File Read via ByteBuffer are organized into topic(s).

Method

longreadLong(InputStream input)
read Long 
byte[] longBytes = new byte[LONG_LEN];
int r = input.read(longBytes, 0, LONG_LEN);
if (r != LONG_LEN) {
    throw new IOException("Bytes missing: read " + r + ", expected " + LONG_LEN);
return ByteBuffer.wrap(longBytes).getLong();
longreadLong(InputStream is)
read Long 
byte[] b = new byte[8];
is.read(b);
return ByteBuffer.wrap(b).getLong();
longreadLong(InputStream is, ByteOrder bo)
Read a single long from the InputStream using given ByteOrder pointer respectively. 
byte[] bbuf = new byte[Long.SIZE / 8];
int read = is.read(bbuf);
if (read < bbuf.length)
    throw new IOException("could not read required bytes");
ByteBuffer bb = ByteBuffer.wrap(bbuf);
bb.order(bo);
return bb.getLong();
longreadLong(RandomAccessFile raFile)
read Long 
byte[] theBytes = new byte[8];
int count = raFile.read(theBytes);
if (8 == count) {
    return ByteBuffer.wrap(theBytes).getLong();
} else {
    throw new EOFException("not enough data to satisfy read of long value");
intreadLTriad(byte[] triad)
read L Triad 
return triad[0] + (triad[1] << 8) + (triad[2] << 16);
byte[]readNByte(ReadableByteChannel channel, int n)
read N Byte 
byte[] result = new byte[n];
channel.read(ByteBuffer.wrap(result));
return result;
ListreadNIOFile(String filePath)
read NIO File 
List<String> lineList = new ArrayList<String>();
RandomAccessFile aFile = new RandomAccessFile(filePath, "r");
FileChannel inChannel = aFile.getChannel();
MappedByteBuffer buffer = inChannel.map(FileChannel.MapMode.READ_ONLY, 0, inChannel.size());
buffer.load();
char c = '0';
StringBuffer lineStr = new StringBuffer();
for (int i = 0; i < buffer.limit(); i++) {
...
shortreadShort(byte[] bytes, int start)
Reads a short from the bytes array start position. 
ByteBuffer bb = shortBuffer.get();
bb.clear();
bb.put(bytes[start + 0]);
bb.put(bytes[start + 1]);
return bb.getShort(0);
shortreadShort(DataInput input)
read Short 
byte[] buf = new byte[2];
input.readFully(buf);
ByteBuffer bb = ByteBuffer.wrap(buf).order(ByteOrder.LITTLE_ENDIAN);
return bb.getShort(0);
ByteBufferreadShortBuffer(DataInputStream input)
read Short Buffer 
short size = input.readShort();
if (size < 0) {
    return null;
ByteBuffer buffer = ByteBuffer.allocate(size);
int read = 0;
while (read < size) {
    int readBytes = input.read(buffer.array());
...