Java Utililty Methods String Encode by Charset

List of utility methods to do String Encode by Charset

  1. HOME
  2. Java
  3. S
  4. String Encode by Charset

Description

The list of methods to do String Encode by Charset are organized into topic(s).

Method

StringcanEncode(String charset, CharSequence text, String unicodeValue)
can Encode 
Charset cs;
try {
    cs = Charset.forName(charset);
} catch (IllegalCharsetNameException e) {
    return "Charset name '" + charset + "' is illegal.";
} catch (UnsupportedCharsetException e) {
    return "Charset '" + charset + "' is not supported.";
if (cs.canEncode() && cs.newEncoder().canEncode(text)) {
    return null;
return "Charset '" + charset + "' does not support encoding for \\u" + unicodeValue + ".";
booleancanEncode(String sz, String charset)
can Encode 
try {
    Charset cs = Charset.forName(charset);
    if (cs.canEncode()) {
        CharsetEncoder cse = cs.newEncoder();
        return cse.encode(CharBuffer.wrap(sz)) != null;
    } else {
        return false;
} catch (Exception e) {
    return false;
CharsetcharsetForNameOrDefault(String encoding)
charset For Name Or Default 
Charset charset = (encoding == null) ? Charset.defaultCharset() : Charset.forName(encoding);
return charset;
voidcheckEncoder(CharsetEncoder encoder)
check Encoder 
if (encoder == null) {
    throw new IOException("Writer is closed");
byte[]deflate(int level, String str, Charset encoding)
deflate 
byte[] bytes = str.getBytes(encoding);
Deflater def = new Deflater(level, true);
def.reset();
def.setInput(bytes);
def.finish();
byte[] buffer = getThreadBuffer();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
while (!def.finished()) {
...
byte[]encode(Charset charset, String string)
encode 
CharsetEncoder ce = charset.newEncoder();
int en = scale(string.length(), ce.maxBytesPerChar());
byte[] ba = new byte[en];
if (string.length() == 0)
    return ba;
ce.reset();
ByteBuffer bb = ByteBuffer.wrap(ba);
CharBuffer cb = CharBuffer.wrap(string);
...
Stringencode(final String str, final Charset charset)
encode 
try {
    return URLEncoder.encode(str, charset.name());
} catch (UnsupportedEncodingException ex) {
    throw new RuntimeException(ex);
ByteBufferencode(String charsetName, char[] chars, int offset, int length)
encode 
return encode(charsetName, CharBuffer.wrap(chars, offset, length));
Stringencode(String s, Charset encoding)

Escape a string into URI syntax

This function applies the URI escaping rules defined in section 2 of [RFC 2396], as amended by [RFC 2732], to the string supplied as the first argument, which typically represents all or part of a URI, URI reference or IRI. 

if (s == null || s.isEmpty()) {
    return null;
int length = s.length();
int start = 0;
int i = 0;
StringBuilder result = new StringBuilder(length);
while (true) {
...
byte[]encode(String text, Charset charset)
encode 
ByteBuffer buffer = charset.encode(text);
byte[] bytes = new byte[buffer.limit()];
buffer.get(bytes);
return bytes;