Java Utililty Methods InputStream to String

StringWriter sw = new StringWriter();
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
String line;
try {
    while ((line = reader.readLine()) != null) {
        sw.append(line).append('\n');
    return sw.toString();
...

InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
StringWriter sw = new StringWriter();
char c[] = new char[1024];
while (true) {
    int n = br.read(c, 0, c.length);
    if (n < 0)
        break;
...

final byte[] buffer = new byte[0x10000];
StringBuilder out = new StringBuilder();
int read;
do {
    read = is.read(buffer, 0, buffer.length);
    if (read > 0) {
        out.append(new String(buffer, 0, read));
} while (read >= 0);
return out.toString();

StringBuilder sb = new StringBuilder();
Reader reader = new InputStreamReader(is);
char[] buffer = new char[STREAM_BUFFER_SIZE];
int count;
while ((count = reader.read(buffer)) > 0) {
    sb.append(buffer, 0, count);
return sb.toString();
...

if (is == null) {
    throw new IllegalArgumentException("InputStream was null!");
final int bufferSize = 1024;
final char[] buffer = new char[bufferSize];
final StringBuilder out = new StringBuilder();
Reader in = new InputStreamReader(is, "UTF-8");
for (;;) {
...

return new String(exhaustInputStreamUnchecked(is));

ByteArrayOutputStream result = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int length;
try {
    while ((length = s.read(buffer)) != -1) {
        result.write(buffer, 0, length);
} catch (IOException e1) {
...

ByteArrayOutputStream result = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int length;
String resultString = null;
while ((length = stream.read(buffer)) != -1) {
    result.write(buffer, 0, length);
resultString = result.toString("UTF-8");
...

return InputStreamToStringList(input_stream).toArray(new String[0]);

InputStreamReader reader = new InputStreamReader(stream);
StringBuffer str = new StringBuffer();
char[] buff = new char[8192];
int len = 0;
while ((len = reader.read(buff)) != -1) {
    str.append(buff, 0, len);
reader.close();
...