The java.net.Socket class represents a socket, and the java.net.ServerSocket class provides a mechanism for the server program to listen for clients and establish connections with them.
Java Socket programming is used for communication between the applications running on different JRE.
Java Socket programming can be connection-oriented or connection-less.
Socket and ServerSocket classes are used for connection-oriented socket programming and DatagramSocket and DatagramPacket classes are used for connection-less socket programming.
The client in socket programming must know two information:
- IP Address of Server, and
- Port number.
A socket is simply an endpoint for communications between the machines. The Socket class can be used to create a socket.
public InputStream getInputStream() , public OutputStream getOutputStream(),public synchronized void close() are important methods in clientside programming.
public Socket accept(),2) public synchronized void close() are important methods in serverside Programming.
The ServerSocket class can be used to create a server socket. This object is used to establish communication with the clients.
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