Java Utililty Methods File Copy nio

if (!inFile.exists()) {
    return false;
FileChannel in = null;
FileChannel out = null;
try {
    in = new FileInputStream(inFile).getChannel();
    out = new FileOutputStream(outFile).getChannel();
...

FileInputStream fis = new FileInputStream(input);
FileOutputStream fos = new FileOutputStream(output);
try {
    FileChannel ic = fis.getChannel();
    FileChannel oc = fos.getChannel();
    try {
        oc.transferFrom(ic, 0, ic.size());
    } finally {
...

copy(inputFile, out, false);

FileChannel inputChannel = null;
FileChannel outputChannel = null;
try {
    inputChannel = new FileInputStream(source).getChannel();
    outputChannel = new FileOutputStream(dest).getChannel();
    outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
} finally {
    inputChannel.close();
...

Files.copy(source.toPath(), dest.toPath());
if (source.isDirectory()) {
    for (String s : source.list()) {
        copy(new File(source, s), new File(dest, s));

Files.copy(source.toPath(), dest.toPath());

FileChannel in = null, out = null;
try {
    in = new FileInputStream(source).getChannel();
    out = new FileOutputStream(dest).getChannel();
    long size = in.size();
    MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY, 0, size);
    out.write(buf);
} finally {
...

if (source.isDirectory()) {
    dest.mkdir();
    for (File child : listFiles(source)) {
        copy(child, new File(dest, child.getName()));
} else {
    if (source.exists()) {
        long lm = source.lastModified();
...

FileChannel in = null, out = null;
try {
    dest.getParentFile().mkdirs();
    in = new FileInputStream(source).getChannel();
    out = new FileOutputStream(dest).getChannel();
    long size = in.size();
    MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY, 0, size);
    out.write(buf);
...

if (source.isDirectory()) {
    copyDirectory(source, destination);
} else {
    copyFile(source, destination);