Java Utililty Methods BufferedInputStream Copy

in = new BufferedInputStream(new FileInputStream(file));
out = new BufferedOutputStream(new FileOutputStream(ziel, true));
int bytes = 0;
while ((bytes = in.read()) != -1) {
    out.write(bytes);
in.close();
out.close();
...

createFileSafely(to);
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(from));
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(to));
byte[] block;
while (bis.available() > 0) {
    block = new byte[16384];
    final int readNow = bis.read(block);
    bos.write(block, 0, readNow);
...

int bytes;
long length;
long fileSize;
BufferedInputStream in = null;
BufferedOutputStream out = null;
try {
    in = new BufferedInputStream(new FileInputStream(from));
} catch (IOException ex) {
...

InputStream in = null;
OutputStream out = null;
try {
    in = new FileInputStream(from);
} catch (IOException ex) {
    throw new IOException(
            "Utilities.copyFile: opening input stream '" + from.getPath() + "', " + ex.getMessage());
try {
    out = new FileOutputStream(to);
} catch (Exception ex) {
    try {
        in.close();
    } catch (IOException ex1) {
    throw new IOException(
            "Utilities.copyFile: opening output stream '" + to.getPath() + "', " + ex.getMessage());
copyInputToOutput(in, out, from.length());

InputStream in = null;
OutputStream out = null;
try {
    in = new BufferedInputStream(new FileInputStream(from));
    out = new BufferedOutputStream(new FileOutputStream(to));
    byte[] buf = new byte[1024];
    int len;
    while ((len = in.read(buf)) > 0) {
...

toFile.getParentFile().mkdirs();
BufferedInputStream bufin = null;
FileOutputStream fos = null;
try {
    bufin = new BufferedInputStream(new FileInputStream(fromFile));
    fos = new FileOutputStream(toFile);
    int len = 8196;
    byte[] buff = new byte[len];
...

if (fDestFile.isDirectory()) {
    fDestFile = new File(fDestFile, fSrcFile.getName());
File fParent = fDestFile.getParentFile();
if (!fParent.exists()) {
    if (!fParent.mkdirs()) {
        throw new IOException("Unable to create parent folder: " + fParent);
InputStream in = null;
OutputStream out = null;
final int iCopyBufferSize = 32768;
boolean bSuccess = false;
try {
    in = new BufferedInputStream(new FileInputStream(fSrcFile));
    out = new BufferedOutputStream(new FileOutputStream(fDestFile));
    byte[] baBuffer = new byte[iCopyBufferSize];
    int iReadCount;
    while ((iReadCount = in.read(baBuffer)) > 0) {
        out.write(baBuffer, 0, iReadCount);
    bSuccess = true;
    baBuffer = null;
} finally {
    closeStream(in);
    closeStream(out);
    if (!bSuccess && fDestFile.exists()) {
        fDestFile.delete();

BufferedInputStream bis = null;
BufferedOutputStream bos = null;
try {
    bis = new BufferedInputStream(new FileInputStream(in));
    bos = new BufferedOutputStream(new FileOutputStream(out));
    int available = bis.available();
    available = available <= 0 ? DEFAULT_BUFFER_SIZE : available;
    int chunkSize = Math.min(DEFAULT_BUFFER_SIZE, available);
...

BufferedInputStream bufin = null;
BufferedOutputStream bufout = null;
try {
    FileInputStream fis = new FileInputStream(in);
    bufin = new BufferedInputStream(fis);
    out.delete();
    FileOutputStream fos = new FileOutputStream(out);
    bufout = new BufferedOutputStream(fos);
...

BufferedInputStream is = null;
BufferedOutputStream os = null;
try {
    is = new BufferedInputStream(new FileInputStream(inFile));
    os = new BufferedOutputStream(new FileOutputStream(outFile));
    copyStream(is, os);
} finally {
    safeCloseStream(is);
...