Return the number of bytes that hold an Unicode char. : Unicode « Development « Java Tutorial

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;

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 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License. 

 * Various string manipulation methods that are more efficient then chaining
 * string operations: all is done in the same buffer without creating a bunch of
 * string objects.
 * @author <a href="">Dungeon Project</a>
public class Main {
  private static final int CHAR_ONE_BYTE_MASK = 0xFFFFFF80;

  private static final int CHAR_TWO_BYTES_MASK = 0xFFFFF800;

  private static final int CHAR_THREE_BYTES_MASK = 0xFFFF0000;

  private static final int CHAR_FOUR_BYTES_MASK = 0xFFE00000;

  private static final int CHAR_FIVE_BYTES_MASK = 0xFC000000;

  private static final int CHAR_SIX_BYTES_MASK = 0x80000000;
   * Return the number of bytes that hold an Unicode char.
   * @param car
   *            The character to be decoded
   * @return The number of bytes to hold the char. TODO : Should stop after
   *         the third byte, as a char is only 2 bytes long.
  public static final int countNbBytesPerChar( char car )
      if ( ( car & CHAR_ONE_BYTE_MASK ) == 0 )
          return 1;
      else if ( ( car & CHAR_TWO_BYTES_MASK ) == 0 )
          return 2;
      else if ( ( car & CHAR_THREE_BYTES_MASK ) == 0 )
          return 3;
      else if ( ( car & CHAR_FOUR_BYTES_MASK ) == 0 )
          return 4;
      else if ( ( car & CHAR_FIVE_BYTES_MASK ) == 0 )
          return 5;
      else if ( ( car & CHAR_SIX_BYTES_MASK ) == 0 )
          return 6;
          return -1;

6.16.1.Using Unicode in String
6.16.2.Display special character using Unicode
6.16.3.Convert from Unicode to UTF-8
6.16.4.Convert from UTF-8 to Unicode
6.16.5.Convert string to UTF8 bytes
6.16.6.Converts Unicode into something that can be embedded in a java properties file
6.16.7.Converts the string to the unicode format
6.16.8.Return an UTF-8 encoded String
6.16.9.Return an UTF-8 encoded String by length
6.16.10.Return UTF-8 encoded byte[] representation of a String
6.16.11.Get UTF String Size
6.16.12.Return the number of bytes that hold an Unicode char.
6.16.13.Return the Unicode char which is coded in the bytes at position 0.
6.16.14.Return the Unicode char which is coded in the bytes at the given position.
6.16.15.Checks if the String contains only unicode digits or space
6.16.16.Checks if the String contains only unicode digits. A decimal point is not a unicode digit and returns false.
6.16.17.Checks if the String contains only unicode letters and space (' ').
6.16.18.Checks if the String contains only unicode letters or digits.
6.16.19.Checks if the String contains only unicode letters, digits or space (' ').
6.16.20.Checks if the String contains only unicode letters.
6.16.21.Count the number of bytes included in the given char[].
6.16.22.Count the number of bytes needed to return an Unicode char. This can be from 1 to 6.
6.16.23.Count the number of chars included in the given byte[].
6.16.24.Decodes values of attributes in the DN encoded in hex into a UTF-8 String.
6.16.25.Safe UTF: 64K serialized size