Java Utililty Methods Byte Array to String by Charset

List of utility methods to do Byte Array to String by Charset

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Description

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

Method

byte[]asBytes(String string, Charset charset)
Turn a string into an array of bytes using the passed Charset 
if (string == null) {
    return null;
if (charset == null) {
    throw new IllegalArgumentException("Cannot get bytes without a Charset");
try {
    return string.getBytes(charset.name());
...
StringbytesToString(byte[] bytes, Charset charset)
bytes To String 
return new String(bytes, charset);
StringbyteToString(byte[] b, String charset)
byte To String 
try {
    return new String(b, charset);
} catch (UnsupportedEncodingException e) {
    return null;
StringbyteToString(Charset charset, byte[] data)
byte To String 
CharBuffer buffer = charset.decode(ByteBuffer.wrap(data));
String str = new String(buffer.array());
return str;
byte[]changeEncoding(byte[] byteArray, Charset charsetFrom, Charset charsetTo)
Usage: Charset charsetFrom = Charset.forName("UTF-8"); Charset charsetTo = Charset.forName("ISO-8859-15"); 
ByteBuffer inputBuffer = ByteBuffer.wrap(byteArray);
CharBuffer data = charsetFrom.decode(inputBuffer);
ByteBuffer outputBuffer = charsetTo.encode(data);
return outputBuffer.array();
byte[]charSequence2Bytes(CharSequence sb, Charset charset)
char Sequence Bytes 
ByteBuffer bb = charSequence2ByteBuffer(sb, charset);
return byteBuffer2ByteArray(bb);
OptionalcharSetForBOM(byte[] buffer, int offset)
Determine UTF character set via byte order mark 
if (buffer.length < 2 + offset) {
    return Optional.empty();
int o = +offset;
if ((buffer[o] == (byte) 0xFE) && (buffer[o + 1] == (byte) 0xFF)) {
    return Optional.of(StandardCharsets.UTF_16BE);
if ((buffer[o] == (byte) 0xFF) && (buffer[o + 1] == (byte) 0xFE)) {
...
byte[]convertCharset(byte[] content, Charset fromCharset, Charset toCharset)
convert Charset 
if (content == null || content.length == 0)
    return null;
if (fromCharset == null || toCharset == null) {
    throw new IllegalArgumentException("Charset cannot be null!");
CharBuffer inputContent = fromCharset.decode(ByteBuffer.wrap(content));
ByteBuffer result = toCharset.encode(inputContent);
return Arrays.copyOf(result.array(), result.limit());
...
byte[]convertToBytes(final String str, final Charset charset)
convert To Bytes 
return str.getBytes(charset);
char[]convertToChars(final byte[] bytes, final Charset charset)
convert To Chars 
ByteBuffer bb = ByteBuffer.allocate(bytes.length);
bb.put(bytes);
bb.flip();
CharBuffer cb = charset.decode(bb);
return cb.array();