Java Utililty Methods FileChannel Copy

File outdir = getFileDirOnly(new File(aToFilename));
outdir.mkdirs();
FileInputStream fis = new FileInputStream(aFromFile.getAbsolutePath());
FileChannel inChannel = fis.getChannel();
FileOutputStream fos = new FileOutputStream(aToFilename);
FileChannel outChannel = fos.getChannel();
try {
    inChannel.transferTo(0, inChannel.size(), outChannel);
...

if (!isLockingSupported()) {
    return copyFileNormal(copyFrom, copyTo);
} else {
    return copyFileLocking(copyFrom, copyTo);

if (!isCanReadFile(file))
    throw new RuntimeException("The File can't read:" + file.getPath());
if (!isCanWriteDirectory(destDir))
    throw new RuntimeException("The Directory can't write:" + destDir);
FileChannel srcChannel = null;
FileChannel dstChannel = null;
try {
    srcChannel = new FileInputStream(file).getChannel();
...

FileChannel sourceChannel = null;
FileChannel destinationChannel = null;
try {
    sourceChannel = new FileInputStream(fileIn).getChannel();
    destinationChannel = new FileOutputStream(fileOut).getChannel();
    sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel);
} finally {
    try {
...

return copyFile(from, to, false);

FileChannel inChannel = new FileInputStream(from).getChannel();
FileChannel outChannel = new FileOutputStream(to).getChannel();
try {
    inChannel.transferTo(0, inChannel.size(), outChannel);
} catch (IOException e) {
    throw e;
} finally {
    if (inChannel != null)
...

FileChannel infc = null;
FileChannel outfc = null;
try {
    infc = new FileInputStream(from).getChannel();
    outfc = new FileOutputStream(to).getChannel();
    long transfered = infc.transferTo(0, from.length(), outfc);
    while (transfered < from.length()) {
        transfered = infc.transferTo(transfered, from.length(), outfc);
...

if (!from.exists()) {
    throw new FileNotFoundException();
if (from.isDirectory() || to.isDirectory()) {
    throw new FileNotFoundException();
FileInputStream fi = null;
FileChannel in = null;
...

FileInputStream fis = new FileInputStream(from);
RandomAccessFile raf = new RandomAccessFile(to, "rw");
fis.skip(fromoffset);
raf.seek(tooffset);
byte buffer[] = new byte[1024];
long xfered = 0;
while (xfered < size) {
    int xln = fis.read(buffer, 0, (int) Math.min(buffer.length, size - xfered));
...

try (FileInputStream fin = new FileInputStream(in);
        FileChannel inChannel = fin.getChannel();
        FileOutputStream fos = new FileOutputStream(out);
        FileChannel outChannel = fos.getChannel()) {
    inChannel.transferTo(0, inChannel.size(), outChannel);