Java I/O

by Harold, Elliotte Rusty; Loukides, Mike; Elliotte, Rusty Harold

• ISBN13: 9781565924857
• ISBN10: 1565924851
• Format: Paperback
• Copyright: 1999-03-01
• Publisher: Oreilly & Associates Inc

Summary

All of Java's Input/Output (I/O) facilities are based on streams, which provide simple ways to read & write data of different types. Java provides many kinds of streams, each with its own application. The universe of streams is divided into four categories: input streams & output streams, for reading & writing binary data; & readers & writers, for reading & writing textual (character) data. You're familiar with the basic kinds of streams - but did you know that there's a CryptInputStream for reading encrypted data? And a ZipOutputStream for automatically compressing data? Do you know how to use buffered streams effectively to make your I/O operations more efficient? Java I/O tells you all you need to know about streams - & probably more. A discussion of I/O wouldn't be complete without treatment of character sets & formatting. Java supports the UNICODE standard, which provides definitions for the character sets of most written languages. Consequently, Java is the first programming language that lets you do I/O in any language. It also provides a sophisticated model for formatting textual & numeric data. Java I/O shows you how to control number formatting, use characters aside from the standard ASCII character set, & get a head start on writing truly multilingual software. Covers Java 1.2.

Table of Contents

Preface	xiii
I. BASIC I/O	1	(44)
1. Introducing I/O	3	(23)
What Is a Stream?	4	(3)
Numeric Data	7	(4)
Character Data	11	(4)
Readers and Writers	15	(2)
The Ubiquitous IO Exception	17	(1)
The Console: System.Out, System.in, and System.err	18	(6)
Security Checks on I/O	24	(2)
2. Output Streams	26	(9)
The OutputStream Class	26	(1)
Writing Bytes to Output Streams	27	(1)
Writing Arrays of Bytes	28	(1)
Flushing and Closing Output Streams	29	(2)
Subclassing OutputStream	31	(1)
A Graphical User Interface for Output Streams	32	(3)
3. Input Streams	35	(10)
The InputStream Class	35	(1)
The read() Method	35	(2)
Reading Chunks of Data from a Stream	37	(1)
Counting the Available Bytes	38	(1)
Skipping Bytes	39	(1)
Closing Input Streams	40	(1)
Marking and Resetting	41	(1)
Subclassing InputStream	41	(2)
An Efficient Stream Copier	43	(2)
II. DATA SOURCES	45	(30)
4. File Streams	47	(11)
Reading Files	47	(3)
Writing Files	50	(3)
File Viewer, Part 1	53	(5)
5. Network Streams	58	(17)
URLs	58	(3)
URL Connections	61	(4)
Sockets	65	(4)
Server Sockets	69	(3)
URLViewer	72	(3)
III. FILTER STREAMS	75	(190)
6. Filter Streams	77	(25)
The Filter Stream Classes	77	(6)
The Filter Stream Subclasses	83	(1)
Buffered Streams	84	(3)
PushbackInputStream	87	(1)
Print Streams	88	(2)
Multitarget Output Streams	90	(4)
File Viewer, Part 2	94	(8)
7. Data Streams	102	(42)
The Data Stream Classes	102	(3)
Reading and Writing Integers	105	(6)
Reading and Writing Floating-Point Numbers	111	(4)
Reading and Writing Booleans	115	(1)
Reading Byte Arrays	115	(1)
Reading and Writing Text	116	(4)
Miscellaneous Methods	120	(1)
Reading and Writing Little-Endian Numbers	121	(14)
Thread Safety	135	(1)
File Viewer, Part 3	136	(8)
8. Streams in Memory	144	(11)
Sequence Input Streams	144	(2)
Byte Array Streams	146	(3)
Communicating Between Threads with Piped Streams	149	(6)
9. Compressing Streams	155	(61)
Inflaters and Deflaters	155	(15)
Compressing and Decompressing Streams	170	(8)
Working with Zip Files	178	(15)
Checksums	193	(4)
JAR Files	197	(15)
File Viewer, Part 4	212	(4)
10. Cryptographic Streams	216	(49)
Hash Function Basics	217	(3)
The MessageDigest Class	220	(8)
Digest Streams	228	(7)
Encryption Basics	235	(3)
The Cipher Class	238	(16)
Cipher Streams	254	(6)
File Viewer, Part 5	260	(5)
IV. ADVANCED AND MISCELLANEOUS TOPICS	265	(270)
11. Object Serialization	267	(37)
Reading and Writing Objects	267	(2)
Object Streams	269	(1)
How Object Serialization Works	270	(2)
Performance	272	(1)
The Serializable Interface	273	(7)
The ObjectInput and ObjectOutput Interfaces	280	(2)
Versioning	282	(3)
Customizing the Serialization Format	285	(11)
Resolving Classes	296	(1)
Resolving Objects	297	(1)
Validation	297	(3)
Sealed Objects	300	(4)
12. Working with Files	304	(46)
Understanding Files	305	(8)
Directories and Paths	313	(7)
The File Class	320	(22)
Filename Filters	342	(1)
File Filters	343	(1)
File Descriptors	344	(1)
Random-Access Files	345	(3)
General Techniques for Cross-Platform File Access Code	348	(2)
13. File Dialogs and Choosers	350	(37)
File Dialogs	350	(8)
JFileChooser	358	(21)
File Viewer, Part 6	379	(8)
14. Multilingual Character Sets and Unicode	387	(27)
Unicode	388	(1)
Displaying Unicode Text	389	(8)
Unicode Escapes	397	(1)
UTF-8	398	(2)
The char Data Type	400	(10)
Other Encodings	410	(1)
Converting Between Byte Arrays and Strings	411	(3)
15. Readers and Writers	414	(42)
The java.io.Writer Class	415	(1)
The OutputStream Writer Class	416	(3)
The java.io.Reader Class	419	(1)
The InputStreamReader Class	420	(2)
Character Array Readers and Writers	422	(3)
String Readers and Writers	425	(3)
Reading and Writing Files	428	(2)
Buffered Readers and Writers	430	(5)
Print Writers	435	(2)
Piped Readers and Writers	437	(2)
Filtered Readers and Writers	439	(6)
File Viewer Finis	445	(11)
16. Formatted I/O with java.text	456	(44)
The Old Way	457	(2)
Choosing a Locale	459	(3)
Number Formats	462	(9)
Specifying Width with FieldPosition	471	(5)
Parsing Input	476	(3)
Decimal Formats	479	(14)
An Exponential Number Format	493	(7)
17. The Java Communications API	500	(35)
The Architecture of the Java Communications API	500	(1)
Identifying Ports	501	(9)
Communicating with a Device on a Port	510	(7)
Serial Ports	517	(11)
Parallel Ports	528	(7)
V. APPENDIXES	535	(20)
A. Additional Resources	537	(7)
B. Character Sets	544	(11)
Index	555