What is the use of getLocalPort? The getLocalPort() method of ServerSocket class is used to give the port number of the server on which this socket is listening. If the socket was bound before being
What is the use of getLocalPort?
The getLocalPort() method of ServerSocket class is used to give the port number of the server on which this socket is listening. If the socket was bound before being closed, then this method will continue to return the port number after the socket is closed.
What is a server socket in java?
A socket is one endpoint of a two-way communication link between two programs running on the network. The java.net package in the Java platform provides a class, Socket , that implements one side of a two-way connection between your Java program and another program on the network.
What is socket method in java?
Java Socket programming is used for communication between the applications running on different JRE. Java Socket programming can be connection-oriented or connection-less. The client in socket programming must know two information: IP Address of Server, and. Port number.
What is a ServerSocket and how is it used?
ServerSocket is a java.net class that provides a system-independent implementation of the server side of a client/server socket connection. The constructor for ServerSocket throws an exception if it can’t listen on the specified port (for example, the port is already being used).
What is java Net package?
The package java.net contains classes and interfaces that provide a powerful infrastructure for networking in Java. The DatagramSocket, MulticastSocket, and DatagramPacket classes for implementing low-level networking. The InetAddress class, which represents Internet addresses.
Why does getPort return?
1 Answer. DatagramSocket. getPort returns the port to which the socket is connected – i.e. the port on the other end of the connection, if you’ve connected the socket. Since you haven’t connected the socket, it returns -1.
What is TCP IP in java?
The java.net package provides support for the two common network protocols − TCP − TCP stands for Transmission Control Protocol, which allows for reliable communication between two applications. TCP is typically used over the Internet Protocol, which is referred to as TCP/IP.
Can two clients connected to same port?
Irrespective of stateful or stateless protocols, two clients can connect to same server port because for each client we can assign a different socket (as client IP will definitely differ). Same client can also have two sockets connecting to same server port – since such sockets differ by SRC-PORT .
Is Java a net?
Java is an object-oriented and platform-independent high-level programming language. . NET is a cross-platform, open-source software framework used for developing a software applications. Java requires JVM (Java Virtual Machine) for execution means during runtime.