JDK Tutorials - Herong's Tutorial Examples - v6.32, by Herong Yang
Running EncodingSampler.java with ISO-8859-1 and US-ASCII
This section provides a tutorial example on how to run the character encoding sample program with ISO-8859-1 and US-ASCII encodings. Character encoding US-ASCII is a subset of ISO-8859-1.
Now, let's run my sample program, EncodingSampler.java, again with another encoding, ISO-8859-1:
herong> java EncodingSampler.java ISO-8859-1 ISO-8859-1 encoding: Char, String, Writer, Charset, Encoder 0000, 00, 00, 00, 00 003F, 3F, 3F, 3F, 3F 0040, 40, 40, 40, 40 007F, 7F, 7F, 7F, 7F 0080, 80, 80, 80, 80 00BF, BF, BF, BF, BF 00C0, C0, C0, C0, C0 00FF, FF, FF, FF, FF 0100, 3F, 3F, 3F, 00 3FFF, 3F, 3F, 3F, 00 4000, 3F, 3F, 3F, 00 7FFF, 3F, 3F, 3F, 00 8000, 3F, 3F, 3F, 00 BFFF, 3F, 3F, 3F, 00 C000, 3F, 3F, 3F, 00 EFFF, 3F, 3F, 3F, 00 F000, 3F, 3F, 3F, 00 FFFF, 3F, 3F, 3F, 00
Ok, ISO-8859-1 appears to be the same as CP1252 based on the test result.
What is the difference between ISO-8859-1 and US-ASCII? Here is the test result of US-ASCII:
herong> java EncodingSampler.java US-ASCII US-ASCII encoding: Char, String, Writer, Charset, Encoder 0000, 00, 00, 00, 00 003F, 3F, 3F, 3F, 3F 0040, 40, 40, 40, 40 007F, 7F, 7F, 7F, 7F 0080, 3F, 3F, 3F, 00 00BF, 3F, 3F, 3F, 00 00C0, 3F, 3F, 3F, 00 00FF, 3F, 3F, 3F, 00 0100, 3F, 3F, 3F, 00 3FFF, 3F, 3F, 3F, 00 4000, 3F, 3F, 3F, 00 7FFF, 3F, 3F, 3F, 00 8000, 3F, 3F, 3F, 00 BFFF, 3F, 3F, 3F, 00 C000, 3F, 3F, 3F, 00 EFFF, 3F, 3F, 3F, 00 F000, 3F, 3F, 3F, 00 FFFF, 3F, 3F, 3F, 00
Obviously, the result shows that encoding US-ASCII has a smaller character set: 0x0000 - 0x007F. Encoding ISO-8859-1 has a larger character set: 0x0000 - 0x00FF. In another word, US-ASCII is a subset of ISO-8859-1.
Table of Contents
Date, Time and Calendar Classes
Date and Time Object and String Conversion
Number Object and Numeric String Conversion
Locales, Localization Methods and Resource Bundles
Calling and Importing Classes Defined in Unnamed Packages
HashSet, Vector, HashMap and Collection Classes
►Character Set Encoding Classes and Methods
Supported Character Encodings in JDK
Charset.encode() - Method to Encode Characters
Running EncodingSampler.java with CP1252 Encoding
►Running EncodingSampler.java with ISO-8859-1 and US-ASCII
Running EncodingSampler.java with UTF-8, UTF-16, UTF16-BE
Running EncodingSampler.java with GB18030
Charset.decode() - Method to Decode Byte Sequences
Encoding Conversion Programs for Encoded Text Files
Datagram Network Communication
DOM (Document Object Model) - API for XML Files
DTD (Document Type Definition) - XML Validation
XSD (XML Schema Definition) - XML Validation
XSL (Extensible Stylesheet Language)
Message Digest Algorithm Implementations in JDK
Private key and Public Key Pair Generation
PKCS#8/X.509 Private/Public Encoding Standards
Digital Signature Algorithm and Sample Program
"keytool" Commands and "keystore" Files
KeyStore and Certificate Classes
Secret Key Generation and Management
Cipher - Encryption and Decryption
The SSL (Secure Socket Layer) Protocol
SSL Socket Communication Testing Programs