JDK (Java Development Kit) Tutorials
Dr. Herong Yang, Version 5.00

Encoding Conversion Programs for Encoded Text Files

This chapter provides tutorial notes and example codes on character encoding conversion. Topics include entering Unicode characters with \uxxxx escape sequences; viewing encoded text files in Hex values; converting text files from one encoding to another; viewing encoded text files in Web browsers; viewing Unicode signs/symbols in different encodings.

\uxxxx - Entering Unicode Data in Java Programs

HexWriter.java - Converting Encoded Byte Sequences to Hex Values

EncodingConverter.java - Encoding Conversion Sample Program

Viewing Encoded Text Files in Web Browsers

Unicode Signs in Different Encodings

Conclusion:

  • Java program seems to be a good way of storing Unicode characters into a file, if you don't have any good text editor that handles Unicode characters.
  • When converting text file from one encoding to another, you need to make sure that all characters in the text file are valid characters in the character set of the output encoding.
  • IE is a very good tool to view Unicode text, if you installed all the required fonts.

Exercise: Adding more messages in other languages in UnicodeHello.java.

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

Table of Contents

 About This JDK Tutorial Book

 Downloading and Installing JDK 1.3.1 on Windows

 Downloading and Installing JDK 1.4.1 on Windows

 Downloading and Installing JDK 1.5.0 on Windows

 Downloading and Installing JDK 1.6.2 on Windows

 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

 Character Set Encoding Maps

Encoding Conversion Programs for Encoded Text Files

 Socket Network Communication

 Datagram Network Communication

 DOM (Document Object Model) - API for XML Files

 SAX (Simple API for XML)

 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 - Secret Key Encryption and Decryption

 The SSL (Secure Socket Layer) Protocol

 SSL Socket Communication Testing Programs

 SSL Client Authentication

 HTTPS (Hypertext Transfer Protocol Secure)

 References

 PDF Printing Version

Dr. Herong Yang, updated in 2008
Encoding Conversion Programs for Encoded Text Files