Java network programming孙卫琴explain the source code used in the following software:

sourcecode
..........\chapter01
..........\.........\build.xml
..........\.........\classes
..........\.........\.......\EchoClient.class
..........\.........\.......\EchoPlayer.class
..........\.........\.......\EchoServer.class
..........\.........\src
..........\.........\...\EchoClient.java
..........\.........\...\EchoPlayer.java
..........\.........\...\EchoServer.java
..........\chapter02
..........\.........\build.xml
..........\.........\classes
..........\.........\.......\auth
..........\.........\.......\....\MailSenderWithAuth.class
..........\.........\.......\....\Message.class
..........\.........\.......\ConnectTester.class
..........\.........\.......\HTTPClient.class
..........\.........\.......\linger
..........\.........\.......\......\SimpleClient.class
..........\.........\.......\......\SimpleServer.class
..........\.........\.......\MailSender.class
..........\.........\.......\Message.class
..........\.........\.......\PortScanner.class
..........\.........\.......\Receiver.class
..........\.........\.......\ReceiveServer.class
..........\.........\.......\SendClient.class
..........\.........\.......\Sender.class
..........\.........\.......\SimpleClient.class
..........\.........\.......\SimpleServer.class
..........\.........\src
..........\.........\...\auth
..........\.........\...\....\MailSenderWithAuth.java
..........\.........\...\ConnectTester.java
..........\.........\...\HTTPClient.java
..........\.........\...\linger
..........\.........\...\......\SimpleClient.java
..........\.........\...\......\SimpleServer.java
..........\.........\...\MailSender.java
..........\.........\...\PortScanner.java
..........\.........\...\Receiver.java
..........\.........\...\ReceiveServer.java
..........\.........\...\SendClient.java
..........\.........\...\Sender.java
..........\.........\...\SimpleClient.java
..........\.........\...\SimpleServer.java
..........\chapter03
..........\.........\build.xml
..........\.........\classes
..........\.........\.......\Client.class
..........\.........\.......\EchoClient.class
..........\.........\.......\multithread1
..........\.........\.......\............\EchoServer.class
..........\.........\.......\............\Handler.class
..........\.........\.......\multithread2
..........\.........\.......\............\EchoServer.class
..........\.........\.......\............\Handler.class
..........\.........\.......\............\ThreadPool$WorkThread.class
..........\.........\.......\............\ThreadPool.class
..........\.........\.......\............\ThreadPoolTester$1.class
..........\.........\.......\............\ThreadPoolTester.class
..........\.........\.......\multithread3
..........\.........\.......\............\EchoServer.class
..........\.........\.......\............\Handler.class
..........\.........\.......\multithread4
..........\.........\.......\............\AdminClient.class
..........\.........\.......\............\EchoServer$1.class
..........\.........\.......\............\EchoServer.class
..........\.........\.......\............\Handler.class
..........\.........\.......\RandomPort.class
..........\.........\.......\Server.class
..........\.........\.......\TimeoutTester.class
..........\.........\src
..........\.........\...\Client.java
..........\.........\...\EchoClient.java
..........\.........\...\multithread1
..........\.........\...\............\EchoServer.java
..........\.........\...\multithread2
..........\.........\...\............\EchoServer.java
..........\.........\...\............\ThreadPool.java
..........\.........\...\............\ThreadPoolTester.java
..........\.........\...\multithread3
..........\.........\...\............\EchoServer.java
..........\.........\...\multithread4
..........\.........\...\............\AdminClient.java
..........\.........\...\............\EchoServer.java
..........\.........\...\RandomPort.java
..........\.........\...\Server.java
..........\.........\...\TimeoutTester.java
..........\chapter04
..........\.........\build.xml
..........\.........\classes
..........\.........\......

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