Java Utililty Methods BufferedReader Create

return getReader(new File(filename));

if (filename == "") {
    return null;
if (filename.equals("-")) {
    return new BufferedReader(new InputStreamReader(System.in));
File inputFile = new File(filename);
if (!inputFile.exists()) {
...

return getReader(filename, "UTF-8");

return new BufferedReader(new InputStreamReader(new FileInputStream(filePath), charset));

if (path.endsWith(".gz")) {
    return new BufferedReader(new InputStreamReader(new GZIPInputStream(new FileInputStream(path))));
return new BufferedReader(new FileReader(path));

File file = new File(Path);
file.createNewFile();
return new BufferedReader(new FileReader(file));

return getReader(new File(path), charEncoding);

InputStream is = getInputStream(path);
return new BufferedReader(new InputStreamReader(is, charEncoding));

StringWriter sw = new StringWriter();
BufferedReader in = new BufferedReader(reader);
char[] buf = new char[8192];
int n;
while ((n = in.read(buf)) > 0) {
    sw.write(buf, 0, n);
return sw.toString();
...

StringBuilder answer = new StringBuilder();
char[] charBuffer = new char[8192];
int nbCharRead ;
try {
    while ((nbCharRead = reader.read(charBuffer)) != -1) {
        answer.append(charBuffer, 0, nbCharRead);
} finally {
...