Java Utililty Methods UTF8

List of utility methods to do UTF8

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Description

The list of methods to do UTF8 are organized into topic(s).

Method

voidsort(String inFile, int keyIndex, String outFile)
sort 
TreeMap<Integer, ArrayList<String>> tmap = new TreeMap<>();
try {
    List<String> list = Files.readAllLines(Paths.get(inFile), StandardCharsets.UTF_8);
    String prevKey = "";
    ArrayList<String> sameKeyLines = new ArrayList<>();
    for (int i = 0; i < list.size(); i++) {
        String[] str = list.get(i).split("\t");
        String currentKey = str[keyIndex];
...
StringstringFromBytesUTF8(byte[] bytes)
string From Bytes UTF 
return stringFromBytes(bytes, _utf8_charset);
byte[]stringToUtf8(String str)
Encodes the specified string as a UTF-8 sequence. 
try {
    return str.getBytes(ENCODING_NAME_UTF8);
} catch (UnsupportedEncodingException e) {
    throw new UnsupportedCharsetException(ENCODING_NAME_UTF8);
byte[]stringToUTF8Bytes(String str)
string To UTF Bytes 
if (str == null)
    return null;
return str.getBytes(UTF8_CHARSET);
byte[]toBytesUTF8(String s)
Creates a byte array from a given string, using the UTF-8 encoding. 
try {
    return s.getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {
    throw new RuntimeException("JVM does not support UTF-8 encoding.", e);
byte[]toBytesUTF8(String str)
to Bytes UTF 
return toBytes(str, StandardCharsets.UTF_8.name());
voidunZip(String zipFile, String outputFolder, boolean skipDirectory)
un Zip 
byte[] buffer = new byte[1024];
try {
    ZipInputStream zis = new ZipInputStream(new FileInputStream(zipFile), Charset.forName("EUC-KR"));
    ZipEntry ze = zis.getNextEntry();
    while (ze != null) {
        String fileName = ze.getName();
        if (!ze.isDirectory() && isAllowedFileName(fileName)) {
            String path = "";
...
byte[]utf8(String string)
utf 
try {
    return string.getBytes("UTF-8");
} catch (Exception e) {
    e.printStackTrace();
    return null;
intutf8BufferByteLen(CharSequence str)
utf Buffer Byte Len 
return str.length() * UTF8_MAX_BYTES_PER_CHAR;
longutf8ByteLength(String string)
Calculates the byte length of a UTF-8 encoded string. 
if (string == null) {
    return 0;
return string.getBytes(UTF_8).length;