1．Basic Network Concepts 1
Networks 2
The Layers of a Network 4
The Host-to-Network Layer 7
The Internet Layer 8
The Transport Layer 9
The Application Layer 10
IP,TCP,and UDP 10
IP Addresses and Domain Names 11
Ports 13
The Internet 14
Internet Address Blocks 15
Network Address Translation 15
Firewalls 15
Proxy Servers 16
The Client/Server Model 18
Internet Standards 19
IETF RFCs 20
W3C Recommendations 22
2．Streams 25
Output Streams 26
Input Streams 31
Marking and Resetting 34
Filter Streams 35
Chaining Filters Together 37
Buffered Streams 38
PrintStream 39
Data Streams 41
Readers and Writers 44
Writers 45
OutputStream Writer 47
Readers 47
Filter Readers and Writers 49
PrintWriter 51
3．Threads 53
Running Threads 55
Subclassing Thread 56
Implementing the Runnable Interface 58
Returning Information from a Thread 60
Race Conditions 61
Polling 63
Callbacks 63
Futures,Callables,and Executors 68
Synchronization 70
Synchronized Blocks 72
Synchronized Methods 74
Alternatives to Synchronization 75
Deadlock 77
Thread Scheduling 78
Priorities 78
Preemption 79
Thread Pools and Executors 89
4．Internet Addresses 93
The InetAddress Class 95
Creating New InetAddress Objects 95
Getter Methods 100
Address Types 102
Testing Reachability 106
Object Methods 106
Inet4Address and Inet6Address 107
The NetworkInterface Class 108
Factory Methods 108
Getter Methods 110
Some Useful Programs 111
SpamCheck 111
Processing Web Server Logfiles 112
5．URLs and URIs 117
URIs 117
URLs 120
Relative URLs 122
The URL Class 123
Creating New URLs 123
Retrieving Data from a URL 128
Splitting a URL into Pieces 135
Equality and Comparison 139
Conversion 141
The URI Class 141
Constructing a URI 142
The Parts of the URI 144
Resolving Relative URIs 147
Equality and Comparison 148
String Representations 149
x-www-form-urlencoded 149
URLEncoder 150
URLDecoder 154
Proxies 154
System Properties 155
The Proxy Class 155
The ProxySelector Class 156
Communicating with Server-Side Programs Through GET 157
Accessing Password-Protected Sites 161
The Authenticator Class 162
The PasswordAuthentication Class 164
The JPasswordField Class 164
6．HTTP 169
The Protocol 169
Keep-Alive 175
HTTP Methods 177
The Request Body 179
Cookies 181
CookieManager 184
CookieStore 185
7．URLConnections 187
Opening URLConnections 188
Reading Data from a Server 189
Reading the Header 190
Retrieving Specific Header Fields 191
Retrieving Arbitrary Header Fields 197
Caches 199
Web Cache for Java 203
Configuring the Connection 208
protected URL url 209
protected boolean connected 209
protected boolean allowUserInteraction 210
protected boolean doInput 211
protected boolean doOutput 212
protected boolean ifModifiedSince 212
protected boolean useCaches 214
Timeouts 215
Configuring the Client Request HTTP Header 215
Writing Data to a Server 218
Security Considerations for URLConnections 223
Guessing MIME Media Types 224
HttpURLConnection 224
The Request Method 225
Disconnecting from the Server 229
Handling Server Responses 230
Proxies 235
Streaming Mode 235
8．Sockets for Clients 237
Using Sockets 237
Investigating Protocols with Telnet 238
Reading from Servers with Sockets 240
Writing to Servers with Sockets 246
Constructing and Connecting Sockets 251
Basic Constructors 251
Picking a Local Interface to Connect From 253
Constructing Without Connecting 254
Socket Addresses 255
Proxy Servers 256
Getting Information About a Socket 257
Closed or Connected? 258
toString() 259
Setting Socket Options 259
TCP_NODELAY 260
SO_LINGER 261
SO_TIMEOUT 261
SO_RCVBUF and SO_SNDBUF 262
SO_KEEPALIVE 263
OOBINLINE 264
SO_REUSEADDR 265
IP_TOS Class of Service 265
Socket Exceptions 267
Sockets in GUI Applications 268
Whois 269
A Network Client Library 272
9．Sockets for Servers 283
Using ServerSockets 283
Serving Binary Data 288
Multithreaded Servers 289
Writing to Servers with Sockets 293
Closing Server Sockets 295
Logging 297
What to Log 297
How to Log 298
Constructing Server Sockets 302
Constructing Without Binding 304
Getting Information About a Server Socket 305
Socket Options 306
SO_TIMEOUT 307
SO_REUSEADDR 308
SO_RCVBUF 308
Class of Service 309
HTTP Servers 309
A Single-File Server 310
A Redirector 314
A Full-Fledged HTTP Server 319
10．Secure Sockets 325
Secure Communications 326
Creating Secure Client Sockets 328
Choosing the Cipher Suites 332
Event Handlers 336
Session Management 336
Client Mode 338
Creating Secure Server Sockets 339
Configuring SSLServerSockets 343
Choosing the Cipher Suites 343
Session Management 344
Client Mode 344
11．Nonblocking I/O 347
An Example Client 349
An Example Server 353
Buffers 359
Creating Buffers 361
Filling and Draining 363
Bulk Methods 364
Data Conversion 365
View Buffers 368
Compacting Buffers 370
Duplicating Buffers 372
Slicing Buffers 376
Marking and Resetting 377
Object Methods 377
Channels 378
SocketChannel 378
ServerSocketChannel 381
The Channels Class 383
Asynchronous Channels(Java 7) 384
Socket Options(Java 7) 386
Readiness Selection 388
The Selector Class 388
The SelectionKey Class 390
12．UDP 393
The UDP Protocol 393
UDP Clients 395
UDP Servers 397
The DatagramPacket Class 399
The Constructors 401
The get Methods 403
The setter Methods 406
The DatagramSocket Class 408
The Constructors 409
Sending and Receiving Datagrams 411
Managing Connections 416
Socket Options 417
SO_TIMEOUT 417
SO_RCVBUF 418
SO_SNDBUF 419
SO_REUSEADDR 419
SO_BROADCAST 419
IP_TOS 420
Some Useful Applications 421
Simple UDP Clients 421
UDPServer 425
A UDP Echo Client 428
DatagramChannel 431
Using DatagramChannel 431
13．IP Multicast 443
Multicasting 444
Multicast Addresses and Groups 447
Clients and Servers 450
Routers and Routing 452
Working with Multicast Sockets 453
The Constructors 454
Communicating with a Multicast Group 455
Two Simple Examples 460
Index 465