Java Networking(I)

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Java Networking(I)

• ???

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Overview

• Java is a very good choice for networking
  programming.
• Client
• Socket
• Applet
• Java Web Start
• Java Network Launch Protocol

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Overview(cont.)

• Server
• ServerSocket
• Servlet
• JSP
• Client Server
• RMI
• EJB
• Soap
• Web Service

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Why Java Networking?

• Java is very suitable for network programming for
  the following reason
• Richness
• As previously discussed, we have many
  java-technologies for network programming.
• Simplicity
• Traditionally, we use Berkerly socket for network
  programming, it is very complex, e.x., we will
  show an example to connect to network

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Why Java Networking?(cont.)
With traditional socket library
familyAF_INET connectionSOCK_STREAM
socketidsocket(family,connection,IPPROTO_TCP) st
ruct hostent hp sockaddr1.sin_familyAF_INET
if(address0gt'1' address0lt'9'
address1gt'0' address1lt'9')
sockaddr1.sin_addr.s_addrinet_addr(address) conn
ect(socketid,(struct sockaddr )(sockaddr1),sizeo
f(sockaddr1))
With java
Socket socketnew Socket(address,port)
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Why Java Networking?(cont.)

• I/O functionality
• Java has great power in I/O,and network
  transmitting is just an I/O operation

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Why Java Networking?(cont.)

• Naming ability
• There is an API called JNDI which is used for
  searching remote objects. This is very important
  for distributed computing, an important issue for
  network programming.
• Platform independence
• This is also very important for distributed
  computing, since programs written on different
  platforms can co-work together easily.