Java Utililty Methods Charset Create

List of utility methods to do Charset Create

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Description

The list of methods to do Charset Create are organized into topic(s).

Method

CharsetgetCharset(String enc)
Returns the Java Charset that should be used for the provided encoding 
Charset charset = encodingToCharsetCache.get(enc);
if (charset == null) {
    charset = Charset.forName(enc);
    encodingToCharsetCache.put(enc, charset);
return charset;
CharsetgetCharset(String encoding)
get Charset 
return ((null == encoding || "".equals(encoding.trim())) ? Charset.forName(DEF_ENCODING)
        : Charset.forName(encoding));
CharsetgetCharset(String encoding)
get Charset 
Charset charset = (Charset) charsets.get(encoding);
if (charset == null) {
    charset = Charset.forName(encoding);
    charsets.put(encoding, charset);
return charset;
CharsetgetCharset(String name)
Gets a charset, throwing the java.io exception and not the java.nio exception if an error occurs. 
try {
    return Charset.forName(name);
} catch (IllegalCharsetNameException e) {
    throw new UnsupportedEncodingException("Charset " + name + " not found.");
} catch (UnsupportedCharsetException e) {
    throw new UnsupportedEncodingException("Charset " + name + " not found.");
CharsetgetCharsetForSortOrder(final int sortOrder)
Retrieves the CharsetInfo instance asociated with the specified sort order. 
String name = sortMap[sortOrder];
return Charset.forName(name);
StringgetCharsetFromContent(URL url)
get Charset From Content 
InputStream stream = url.openStream();
byte chunk[] = new byte[2048];
int bytesRead = stream.read(chunk);
if (bytesRead > 0) {
    String startContent = new String(chunk);
    String pattern = "\\<meta\\s*http-equiv=[\\\"\\']content-type[\\\"\\']\\s*content\\s*=\\s*[\"']text/html\\s*;\\s*charset=([a-z\\d\\-]*)[\\\"\\'\\>]";
    Matcher matcher = Pattern.compile(pattern, Pattern.CASE_INSENSITIVE).matcher(startContent);
    if (matcher.find()) {
...
StringgetCharsetFromContentType(String contentType)
Parse out a charset from a content type header. 
if (contentType == null)
    return null;
Matcher m = charsetPattern.matcher(contentType);
if (m.find()) {
    String charset = m.group(1).trim();
    if (Charset.isSupported(charset))
        return charset;
    charset = charset.toUpperCase(Locale.ENGLISH);
...
StringgetCharsetFromContentType(String contentType)
get Charset From Content Type 
if (contentType == null) {
    return null;
Matcher m = charsetPattern.matcher(contentType);
if (m.find()) {
    String charset = m.group(1).trim();
    charset = charset.replace("charset=", "");
    if (charset.isEmpty())
...
StringgetCharsetFromContentTypeString(String contentType)
get Charset From Content Type String 
if (contentType != null) {
    String pattern = "charset=([a-z\\d\\-]*)";
    Matcher matcher = Pattern.compile(pattern, Pattern.CASE_INSENSITIVE).matcher(contentType);
    if (matcher.find()) {
        String charset = matcher.group(1);
        if (Charset.isSupported(charset)) {
            return charset;
return null;
Charset[]getCharsetList(List availableCharsets, Charset actualCharset)
Returns the supplied List as an array, and guarantees that the specified actual Charset is contained. 
if (actualCharset == null || availableCharsets.contains(actualCharset)) {
    return (Charset[]) availableCharsets.toArray(new Charset[availableCharsets.size()]);
} else {
    List<Charset> resultList = new ArrayList<Charset>();
    resultList.addAll(availableCharsets);
    resultList.add(actualCharset);
    return (Charset[]) resultList.toArray(new Charset[resultList.size()]);