Java Socket Programming

Tag: Test row represents network traffic for throw get static str

Brief introduction:

PORT: 1

1. Used to differentiate different applications.

2. Port number range 0~65535, 0~1023 is reserved for the system.

The 3.IP address and port number make up the socket. Sockets are the endpoints of two-way communication links between programs running on the network, and are the basis for TCP and UDP.

4. Common port number HTTP ftp:21 telnet 23

Network support in Java:

For the different levels of network communication, divided into four categories

1.InetAddress, which represents the hardware class on the network (identifies IP address related information)

2.URL: Network Resource location

3.Sockets: For TCP

4.Datagram: For UDP

Package com. inetaddress;

Import java.net.InetAddress;
Import java.net.UnknownHostException;
Import Java.util.Arrays;

public class Test1 {

public static void Main (string[] args) throws unknownhostexception{
InetAddress address = Inetaddress.getlocalhost ();
SYSTEM.OUT.PRINTLN ("Computer name:" + address.gethostname ());
SYSTEM.OUT.PRINTLN ("Address of the computer:" + address.gethostaddress ());
byte[] bytes = address.getaddress ();//Get IP in byte array form
System.out.println (arrays.tostring (bytes));
SYSTEM.OUT.PRINTLN (address);
InetAddress address2 = inetaddress.getbyaddress (bytes);
InetAddress address2 = Inetaddress.getbyname ("");
System.out.println (Address2.gethostaddress ());
}
}

Java Socket Programming