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

voidreadFileChannelFully(FileChannel fileChannel, byte buf[], int off, int len)
Reads len bytes in a loop using the channel of the stream 
int toRead = len;
ByteBuffer byteBuffer = ByteBuffer.wrap(buf, off, len);
while (toRead > 0) {
    int ret = fileChannel.read(byteBuffer);
    if (ret < 0) {
        throw new IOException("Premeture EOF from inputStream");
    toRead -= ret;
...
ByteBufferreadFileDataIntoBufferBE(FileChannel fc, final int size)
read File Data Into Buffer BE 
final ByteBuffer tagBuffer = ByteBuffer.allocateDirect(size);
fc.read(tagBuffer);
tagBuffer.position(0);
tagBuffer.order(ByteOrder.BIG_ENDIAN);
return tagBuffer;
ByteBufferreadFileFragment(FileChannel fc, long pos, int size)
read File Fragment 
ByteBuffer fragment = null;
try {
    fc.position(pos);
    fragment = ByteBuffer.allocate(size);
    if (fc.read(fragment) != size)
        return null;
    fragment.rewind();
} catch (IOException ex) {
...
intreadFileHeader(FileInputStream fpi)
read File Header 
DataInputStream inStrm = new DataInputStream(fpi);
byte[] buf = new byte[4];
try {
    inStrm.readFully(buf, 0, 4);
    String fType = new String(buf, 0, 4);
    if ("RIFF".equals(fType)) {
        byteOrder = ByteOrder.LITTLE_ENDIAN;
        if (readWavHeader(inStrm, fpi.getChannel()))
...
StringreadFileIntoString(File localFile)
read File Into String 
FileInputStream stream = new FileInputStream(localFile);
try {
    FileChannel fc = stream.getChannel();
    MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
    return Charset.defaultCharset().decode(bb).toString();
} finally {
    stream.close();
StringreadFileIntoString(String path)
Read the contents of a file into String. 
FileInputStream stream = new FileInputStream(new File(path));
try {
    FileChannel fileChannel = stream.getChannel();
    MappedByteBuffer mappedByteBuffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0,
            fileChannel.size());
    return Charset.defaultCharset().decode(mappedByteBuffer).toString();
} finally {
    if (stream != null) {
...
voidreadFileNIO(String path, StringBuilder builder)
read File NIO 
RandomAccessFile aFile = null;
FileChannel inChannel = null;
try {
    aFile = new RandomAccessFile(path, "r");
    inChannel = aFile.getChannel();
    ByteBuffer buffer = ByteBuffer.allocate(1024);
    while (inChannel.read(buffer) > 0) {
        buffer.flip();
...
java.nio.ByteBufferreadFileToBuffer(java.io.File file)
read File To Buffer 
FileInputStream is = new FileInputStream(file);
try {
    FileChannel fc = is.getChannel();
    java.nio.ByteBuffer buffer = java.nio.ByteBuffer.allocate((int) fc.size());
    for (int count = 0; count >= 0 && buffer.hasRemaining();) {
        count = fc.read(buffer);
    buffer.flip();
...
StringreadFileToString(String path)
read File To String 
FileInputStream stream = new FileInputStream(path);
try {
    FileChannel fc = stream.getChannel();
    MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
    return Charset.defaultCharset().decode(bb).toString();
} finally {
    stream.close();
StringreadFileToString(String path)
Reads a file into a string. 
FileInputStream stream = new FileInputStream(new File(path));
try {
    FileChannel fc = stream.getChannel();
    MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
    return Charset.defaultCharset().decode(bb).toString();
} finally {
    stream.close();