Java Utililty Methods String Encode by Charset

try {
    return URLEncoder.encode(value, charset.name());
} catch (UnsupportedEncodingException ex) {
    throw new IllegalArgumentException("Characterset is not supported.");

String out = null;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
    OutputStream os = MimeUtility.encode(baos, "BASE64");
    os.write(s.getBytes(cs));
    out = new String(baos.toByteArray(), cs);
} catch (IOException ignore) {
    ;
...

return string.getBytes(charset);

if (content == null) {
    return null;
return urlEncode(content, charset != null ? charset : Charset.forName("UTF-8"), URLENCODER, true);

ByteBuffer bb = ByteBuffer.allocate(10);
CharBuffer cb = CharBuffer.wrap(new char[] { (char) uchar });
CoderResult result = encoder.encode(cb, bb, true);
if (result.isError()) {
    return 0;
if (bb.position() > 4) {
    return 0;
...

if (content == null) {
    return null;
StringBuilder buf = new StringBuilder();
ByteBuffer bb = charset.encode(content);
while (bb.hasRemaining()) {
    int b = bb.get() & 0xff;
    if (URLENCODER.get(b)) {
...

if (getEncodingOption(options) == null) {
    options.add("-encoding");
    options.add(defaultEncoding.name());
return options;

if (charset == null)
    throw new IllegalArgumentException(
            "charset cannot be null, consider using one of the pre-defined Charset constants from this class for convenience.");
CharsetEncoder result = encoderMap.get(charset);
if (result == null) {
    result = charset.newEncoder();
    encoderMap.put(charset, result);
return result;

if (charset == null) {
    throw new NullPointerException("charset");
Map<Charset, CharsetEncoder> map = encoders.get();
CharsetEncoder e = map.get(charset);
if (e != null) {
    e.reset();
    e.onMalformedInput(CodingErrorAction.REPLACE);
...

return Charset.forName(charset).newEncoder();