Character Set Encoding Maps

<< JDK (Java Development Kit) Tutorials

This chapter provides tutorial notes and example codes on character set encoding maps. Topics include collection types: encoding map analyzer program; analyzing and print encoding maps for US-ASCII, ISO-8859-1/Latin 1, Windows CP1252, Unicode UTF-8, UTF-16, UTF-16LE, UTF-16BE; sample program to count valid characters in each character set encoding.

Character Set Encoding Map Analyzer

Character Set Encoding Maps - US-ASCII and ISO-8859-1/Latin 1

Character Set Encoding Maps - CP1252/Windows-1252

Character Set Encoding Maps - Unicode UTF-8

Character Set Encoding Maps - Unicode UTF-16, UTF-16LE, UTF-16BE

Character Counter Program for Any Given Encoding

Character Set Encoding Comparison

Conclusion:

• A simple Java program can be used to print the encoding map of any given encoding supported by JDK.
• US-ASCII encoding has a code point range of 0x0000 - 0x007F.
• ISO-8859-1/Latin 1 encoding has a code point range of 0x0000 - 0x00FF.
• CP1252/Windows-1252 encoding has a code point range of 0x0000 - 0x00FF plus some values outside this range.
• UTF-8 encoding has a code point range of 0x0000 - 0x00FF except 0xD800 - 0xDFFF.
• A simple Java program can be used to count valid characters of any given encoding.

Notes and sample codes bellow are based on JDK/J2SDK 1.4.1_01.