Java Utililty Methods Text File Read by Charset

return new InputStreamReader(inputStream(baseClass, resourceName), charset);

InputStreamReader result;
if (charsetName == null) {
    result = reader(in);
} else {
    result = new InputStreamReader(in, Charset.forName(charsetName));
return result;

BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), charset));
return reader;

URL jsonUrl = bundle.getEntry(path);
try (Scanner scanner = new Scanner(jsonUrl.openStream(), cs.name())) {
    scanner.useDelimiter("\\A");
    if (scanner.hasNext()) {
        return scanner.next();
    } else {
        throw new IOException("no content");

FileInputStream fis = new FileInputStream(f);
return readStream(fis, chst, f.length());

FileInputStream stream = new FileInputStream(file);
try {
    FileChannel fc = stream.getChannel();
    MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
    return charset.decode(bb).toString();
} finally {
    stream.close();

InputStream is = new FileInputStream(file);
ByteArrayOutputStream os = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int read;
try {
    while ((read = is.read(buffer)) != -1) {
        os.write(buffer, 0, read);
        os.flush();
...

final FileInputStream stream = new FileInputStream(file);
return readInputStream(stream, cs);

ByteArrayOutputStream baos = new ByteArrayOutputStream();
try (FileInputStream is = new FileInputStream(file)) {
    int length = 0;
    byte[] bytes = new byte[1024 * 4];
    while ((length = is.read(bytes)) > 0) {
        baos.write(bytes, 0, length);
} catch (FileNotFoundException e1) {
...

if (theCharset == null) {
    theCharset = Charset.defaultCharset();
Reader reader = new InputStreamReader(new FileInputStream(theFile), theCharset);
return readFromReaderIntoString(reader);