Java Utililty Methods InputStream to OutputStream

byte[] buffer = new byte[4096];
for (int i = 0; i < len;) {
    int toRead = Math.min(buffer.length, len - i);
    int r = in.read(buffer, 0, toRead);
    if (r < 0) {
        throw new EOFException();
    i += r;
...

byte[] buffer = new byte[1024 * 4];
long count = 0;
int n = 0;
long size = entry.getSize();
while (-1 != (n = in.read(buffer)) && count < size) {
    out.write(buffer, 0, n);
    count += n;

byte[] buf = new byte[COPY_BUF_SIZE];
int len;
if (maxLen <= 0)
    while ((len = in.read(buf)) > 0)
        out.write(buf, 0, len);
else
    while ((len = in.read(buf)) > 0)
        if (len <= maxLen) {
...

if (!estDefinit(end))
    throw new Exception("End string can not be null or empty");
int i = -1, pos = 0;
while (-1 != (i = in.read())) {
    out.write(i);
    pos = i == end.charAt(pos) ? pos + 1 : 0;
    if (pos == end.length())
        break;
...

byte[] data = new byte[65536];
while (true) {
    int bytesRead = input.read(data);
    if (bytesRead < 0) {
        break;
    output.write(data, 0, bytesRead);

try {
    final byte data[] = new byte[8192];
    int count;
    while ((count = input.read(data, 0, 8192)) != -1)
        output.write(data, 0, count);
} catch (final IOException e) {
    throw new RuntimeException(e);

copyStream(input, output, new byte[1024]);

StringBuilder sb = new StringBuilder();
byte[] buffer = new byte[1024];
int bytesRead;
while ((bytesRead = input.read(buffer)) != -1) {
    output.write(buffer, 0, bytesRead);
    sb.append(new String(buffer, 0, bytesRead));
return sb.toString();
...

int t = 0;
byte[] buffer = new byte[1024];
int n = input.read(buffer);
while (n >= 0) {
    output.write(buffer, 0, n);
    t += n;
    n = input.read(buffer);
return t;

byte[] buffer = new byte[1024];
int bytesRead;
while ((bytesRead = input.read(buffer)) != -1) {
    output.write(buffer, 0, bytesRead);