Java Utililty Methods InputStream to OutputStream

int BUFSIZE = 8192;
byte[] buf = new byte[BUFSIZE];
BufferedInputStream bin = new BufferedInputStream(in, BUFSIZE);
BufferedOutputStream bout = new BufferedOutputStream(out, BUFSIZE);
try {
    int c;
    long bytesWritten = 0l;
    while ((c = bin.read(buf)) != -1) {
...

int length = 0;
byte[] buffer = new byte[1024];
for (int read = in.read(buffer); read != -1; read = in.read(buffer)) {
    out.write(buffer, 0, read);
    length += read;
out.flush();
out.close();
...

in = new BufferedInputStream(in);
try {
    out = new BufferedOutputStream(out);
    try {
        while (true) {
            int data = in.read();
            if (data == -1)
                break;
...

long total = 0;
int len;
byte[] buffer = new byte[DEFAULT_READ_BUFFER_SIZE];
while ((len = in.read(buffer)) >= 0) {
    out.write(buffer, 0, len);
    total += len;
return total;
...

if (in == null) {
    throw new NullPointerException("Input stream is null");
if (out == null) {
    throw new NullPointerException("Output stream is null");
final byte[] buf = new byte[2048];
int len;
...

byte[] buffer = new byte[BUFSIZ];
for (;;) {
    int size = in.read(buffer);
    if (size <= 0)
        break;
    out.write(buffer, 0, size);

byte[] buffer = new byte[5120];
long bytesCopied = 0;
int bytesInBuffer;
while ((bytesInBuffer = in.read(buffer)) != -1) {
    out.write(buffer, 0, bytesInBuffer);
    bytesCopied += bytesInBuffer;
return bytesCopied;
...

byte[] buf = new byte[4096];
int len;
while ((len = in.read(buf)) != -1) {
    out.write(buf, 0, len);

for (int c; (c = in.read()) != -1;)
    out.write(c);

byte[] bytes = new byte[1024];
int len;
while ((len = in.read(bytes)) != -1)
    out.write(bytes, 0, len);