java.nio.charset

---

1. Creating a Charset

Charset charset = Charset.forName("UTF-8");

2. Encoding a String

byte[] bytes = "Hello".getBytes(charset);

3. Decoding Bytes

String str = new String(bytes, charset);

4. Getting the Charset for a Given Locale

Charset charset = Charset.defaultCharset();

5. Getting the Available Charsets

Set<Charset> charsets = Charset.availableCharsets().keySet();

6. Charset Encoding

CharsetEncoder encoder = charset.newEncoder();

7. Charset Decoding

CharsetDecoder decoder = charset.newDecoder();

8. Charset Normalized Name

String normalizedName = charset.name();

9. Charset Encoding with a BOM

CharsetEncoder encoder = charset.newEncoder().onMalformedInput(CodingErrorAction.REPLACE).onUnmappableCharacter(CodingErrorAction.REPLACE);

10. Charset Decoding with a BOM

CharsetDecoder decoder = charset.newDecoder().onMalformedInput(CodingErrorAction.REPLACE).onUnmappableCharacter(CodingErrorAction.REPLACE);

11. Charset Canonical Name

String canonicalName = charset.canonicalName();

12. Charset Aliases

Set<String> aliases = charset.aliases();

13. Encoding a String with a BOM

byte[] bytes = "Hello".getBytes(charset, true);

14. Decoding Bytes with a BOM

String str = new String(bytes, 0, bytes.length, charset, true);

15. Charset isRegistered

boolean registered = Charset.isRegistered(charset);

16. Charset isSupported

boolean supported = Charset.isSupported(charset);

17. Charset Get Encoding

String encoding = charset.displayName();

18. Charset Get Decoding

String decoding = charset.displayName();

19. Charset isLegalName

boolean legalName = Charset.isLegalName(charset.name());

20. Charset Comparison

int comparison = charset.compareTo(otherCharset);

21. Charset Hash Code

int hashCode = charset.hashCode();

22. Charset Equals

boolean equals = charset.equals(otherCharset);

23. Charset ToString

String str = charset.toString();

24. Charset New Instance

Charset charset = Charset.newInstance(charset.name());

25. Charset Support Arrays

byte[] bytes = { 0x01, 0x02, 0x03 };
char[] chars = { 'a', 'b', 'c' };
Charset charset = Charset.forName("UTF-8");
ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
CharBuffer charBuffer = charset.decode(byteBuffer);
byteBuffer = charset.encode(charBuffer);

26. Charset Support Strings

String str = "Hello";
Charset charset = Charset.forName("UTF-8");
byte[] bytes = str.getBytes(charset);
String decodedStr = new String(bytes, charset);

27. Charset Support Input/Output Streams

Charset charset = Charset.forName("UTF-8");
Reader reader = new InputStreamReader(new FileInputStream("file.txt"), charset);
Writer writer = new OutputStreamWriter(new FileOutputStream("file.txt"), charset);

28. Charset Support File Encoding

Charset charset = Charset.forName("UTF-8");
Files.write(Paths.get("file.txt"), "Hello".getBytes(charset));
String str = new String(Files.readAllBytes(Paths.get("file.txt")), charset);

29. Charset Support Socket Communication

Charset charset = Charset.forName("UTF-8");
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream(), charset));
PrintWriter writer = new PrintWriter(new OutputStreamWriter(socket.getOutputStream(), charset));

30. Charset Support Databases

Charset charset = Charset.forName("UTF-8");
PreparedStatement statement = connection.prepareStatement("UPDATE table SET name = ? WHERE id = ?");
statement.setString(1, "John Doe", charset);
statement.setInt(2, 1);
statement.executeUpdate();

31. Charset Support XML

Charset charset = Charset.forName("UTF-8");
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new InputSource(new FileInputStream("file.xml")));

32. Charset Support JSON

Charset charset = Charset.forName("UTF-8");
JSONObject jsonObject = new JSONObject(new String(Files.readAllBytes(Paths.get("file.json")), charset));

33. Charset Support CSV

Charset charset = Charset.forName("UTF-8");
BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream("file.csv"), charset));
String[] line = reader.readLine().split(",");

34. Charset Support Regular Expressions

Charset charset = Charset.forName("UTF-8");
String regex = "[a-zA-Z]+";
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher("Hello World");

35. Charset Support Internationalization

Charset charset = Charset.forName("UTF-8");
Locale locale = Locale.getDefault();
ResourceBundle bundle = ResourceBundle.getBundle("messages", locale);

36. Charset Support Web Services

Charset charset = Charset.forName("UTF-8");
HttpClient httpClient = new HttpClient();
HttpRequest request = new HttpRequest("http://example.com");
HttpResponse response = httpClient.execute(request);
String body = response.getResponseBodyAsString(charset);

37. Charset Support Error Handling

Charset charset = Charset.forName("UTF-8");
try {
    String str = new String(bytes, charset);
} catch (UnsupportedCharsetException e) {
    // Handle unsupported charset
}

38. Charset Support Character Sets

Charset charset = Charset.forName("UTF-8");
Set<String> charsets = Charset.availableCharsets().keySet();
for (String charsetName : charsets) {
    Charset charset = Charset.forName(charsetName);
}

39. Charset Support Code Pages

Charset charset = Charset.forName("CP1252");

40. Charset Support Legacy Encodings

Charset charset = Charset.forName("ISO-8859-1");

41. Charset Support Historical Encodings

Charset charset = Charset.forName("EUC-JP");

42. Charset Support Emerging Encodings

Charset charset = Charset.forName("UTF-16LE");

43. Charset Support Non-Unicode Encodings

Charset charset = Charset.forName("GBK");

44. Charset Support Encodings with Special Features

Charset charset = Charset.forName("Shift_JIS");

45. Charset Support Encodings with Byte Order Marks

Charset charset = Charset.forName("UTF-16BE");

46. Charset Support Encodings with State Machines

Charset charset = Charset.forName("UTF-32LE");

47. Charset Support Encodings with Surrogate Pairs

Charset charset = Charset.forName("UTF-32BE");

48. Charset Support Extended Encodings

Charset charset = Charset.forName("CESU-8");

49. Charset Support Custom Encodings

Charset charset = Charset.forName("MyCustomCharset");

50. Charset Support Encodings for Specific Languages

Charset charset = Charset.forName("ISO-8859-7");