Java Utililty Methods BufferedReader Read Line

String line;
StringBuilder sb = null;
while ((line = in.readLine()) != null) {
    if (line.length() == 0) {
        break;
    } else if (line.charAt(line.length() - 1) == '\\') {
        if (sb == null)
            sb = new StringBuilder();
...

String nextLine = null;
while ((nextLine = in.readLine()) != null) {
    nextLine = nextLine.trim();
    if (nextLine.length() > 0 && !nextLine.matches("^//.*")) {
        return nextLine;
return null;
...

if (err != null && err.ready()) {
    String msg = err.readLine();
    if (msg.toLowerCase().indexOf("interrupt") >= 0) {
        throw new InterruptedException("");
    } else {
        System.out.println("ERR:" + msg);
        throw new IOException(msg);
char buff[] = new char[BUFF_SIZE];
String result = null;
int go_back = 0;
int size = 0;
while (!in.ready()) {
for (size = 0; size < BUFF_SIZE; size++) {
    if (!in.ready()) {
        if (size == 0)
            return null;
    } else {
        buff[size] = (char) in.read();
        String charac = (new Character(buff[size])).toString();
        if (charac.equals("\n")) {
            go_back++;
            break;
        } else if (buff[size] == -1) {
            go_back++;
            break;
if (size < go_back)
    return "";
result = new String(buff, 0, size);
return result;

String line = input.readLine();
return line;

int ch = -1;
StringBuffer line = new StringBuffer();
ch = reader.read();
while ((ch != -1) && (ch != 13) && (ch != 10)) {
    line.append((char) ch);
    ch = reader.read();
if ((ch == -1) && (line.length() == 0)) {
...

String line = reader.readLine();
if (line != null) {
    return line.trim();
return null;

String result = null;
try {
    result = reader.readLine();
} catch (IOException e) {
    result = null;
return result;

boolean encounteredCr = false;
while (true) {
    int read = reader.read();
    if (read == -1) {
        return encounteredCr;
    if (read == '\r') {
        encounteredCr = true;
...

List<String> result = new ArrayList<String>();
BufferedReader reader = null;
try {
    reader = new BufferedReader(new InputStreamReader(new FileInputStream(f), "utf-8"));
    String line = null;
    while ((line = reader.readLine()) != null)
        result.add(line);
} catch (Exception e) {
...

try {
    return readLine(new FileInputStream(f));
} catch (FileNotFoundException e) {
    e.printStackTrace();
return null;