Character Set Encoding Maps - Unicode UTF-32, UTF-32BE, UTF-32LE

This section provides a tutorial example of analyzing and printing character set encoding maps for 3 encoding, UTF-32, UTF-32BE, and UTF-32LE, for Unicode character set.

Here is the output of my sample program, EncodingAnalyzer2.java, for UTF-32 encoding with Java SE 7:

C:\herong>java EncodingAnalyzer2 UTF-32
UTF-32 encoding:
00000000 > 00 00 00 00 - 000000FF > 00 00 00 FF
00000100 > 00 00 01 00 - 000001FF > 00 00 01 FF
00000200 > 00 00 02 00 - 000002FF > 00 00 02 FF
......
0000D700 > 00 00 D7 00 - 0000D7FF > 00 00 D7 FF
0000D800 > 00 00 FF FD - 0000DFFF > 00 00 FF FD (invalid range)
0000E000 > 00 00 E0 00 - 0000E0FF > 00 00 E0 FF
0000E100 > 00 00 E1 00 - 0000E1FF > 00 00 E1 FF
0000E200 > 00 00 E2 00 - 0000E2FF > 00 00 E2 FF
....
0010FF00 > 00 10 FF 00 - 0010FFFF > 00 10 FF FF

The encoding map of UTF-32, which is another encoding used for the Unicode character set, is the simplest encoding:

Here is the output of my sample program, EncodingAnalyzer2.java, for UTF-32BE encoding with Java SE 7:

C:\herong>java EncodingAnalyzer2 UTF-32BE
UTF-32BE encoding:
00000000 > 00 00 00 00 - 000000FF > 00 00 00 FF
00000100 > 00 00 01 00 - 000001FF > 00 00 01 FF
00000200 > 00 00 02 00 - 000002FF > 00 00 02 FF
......
0000D700 > 00 00 D7 00 - 0000D7FF > 00 00 D7 FF
0000D800 > 00 00 FF FD - 0000DFFF > 00 00 FF FD (invalid range)
0000E000 > 00 00 E0 00 - 0000E0FF > 00 00 E0 FF
0000E100 > 00 00 E1 00 - 0000E1FF > 00 00 E1 FF
0000E200 > 00 00 E2 00 - 0000E2FF > 00 00 E2 FF
....
0010FF00 > 00 10 FF 00 - 0010FFFF > 00 10 FF FF

The output of UTF-32BE is identical to UTF-32.

Here is the output of my sample program, EncodingAnalyzer2.java, for UTF-32LE encoding with Java SE 7:

C:\herong>java EncodingAnalyzer2 UTF-32LE
UTF-32LE encoding:
00000000 > 00 00 00 00 - 0010FFFF > FF FF 10 00

Obviously, my sample program is not doing a good job on UTF-32LE. The last byte of the encode sequence never changes with UTF-32LE and my sample program uses the last byte to detect encoding pattern changes.

Exercise: Find a better way to print out encoding mapping tables.

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

 Character Encoding in Java

Character Set Encoding Maps

 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-16BE, UTF-16LE

Character Set Encoding Maps - Unicode UTF-32, UTF-32BE, UTF-32LE

 Character Counter Program for Any Given Encoding

 Character Set Encoding Comparison

 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