'int' and 'String' - Basic Data Types for Unicode

This section provides an introduction on basic data types for storing Unicode characters in the full range of U+0000 to U+10FFFF: 'int' for a single Unicode character; 'String' for a sequence of Unicode characters.

As we learned from the previous section, the primitive type "char" is no longer capable to support Unicode characters in the full range of U+0000 to U+10FFFF. The best way to write Unicode-friendly Java applications with J2SE 5.0 or higher is to:

Other primitive types and class types can still be used to help managing Unicode characters, but you need to remember their risks and limitations:

Examples of using Unicode-friendly data types:

   int letterC = 0x43; // ASCII character
   int degreeCelsius = 0x2103; // BMP character
   int squaredC = 0x1F132; // Supplementary character

   StringBuilder buffer = new StringBuilder();
   buffer.appendCodePoint(letterC);
   buffer.appendCodePoint(degreeCelsius);
   buffer.appendCodePoint(squaredC);
   String unicodeString = new String(buffer);

Last update: 2012.

Table of Contents

 About This Book

 Character Sets and Encodings

 ASCII Character Set and Encoding

 GB2312 Character Set and Encoding

 GB18030 Character Set and Encoding

 JIS X0208 Character Set and Encodings

 Unicode Character Set

 UTF-8 (Unicode Transformation Format - 8-Bit)

 UTF-16, UTF-16BE and UTF-16LE Encodings

 UTF-32, UTF-32BE and UTF-32LE Encodings

Java Language and Unicode Characters

 Unicode Versions Supported in Java-History

'int' and 'String' - Basic Data Types for Unicode

 "Character" Class with Unicode Utility Methods

 Character.toChars() - "char" Sequence of Code Point

 Character.getNumericValue() - Numeric Value of Code Point

 "String" Class with Unicode Utility Methods

 String.length() Is Not Number of Characters

 String.toCharArray() Returns the UTF-16BE Sequence

 Character Encoding in Java

 Character Set Encoding Maps

 Encoding Conversion Programs for Encoded Text Files

 Using Notepad as a Unicode Text Editor

 Using Microsoft Word as a Unicode Text Editor

 Using Microsoft Excel as a Unicode Text Editor

 Unicode Fonts

 Unicode Code Point Blocks - Code Charts

 Outdated Tutorials

 References

 PDF Printing Version