Java Socket sendUrgentData() method

The sendUrgentData() method of Java Socket class sends one byte of urgent data on the socket. The byte should be the lowest eight bits of the data parameter.

Syntax

Parameter

The ?data? parameter represents the byte of data to send.

Return

Throws

IOException - if there is an error while sending the data.

Example 1

import java.io.IOException;
import java.net.*;
public class JavaSocketSendUrgentDataExample1  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        InetAddress inetAddress=InetAddress.getByName("localhost");
        //the port should be greater or equal to 0, else it will throw an error
        int port=1085;
        //calling the constructor of the SocketAddress class
        SocketAddress socketAddress=new InetSocketAddress(inetAddress, port);
        //binding the socket with inetAddress and port
        socket.bind(socketAddress);
        //the connection will not establish without binding the socket with bind() method
        socket.connect(socketAddress);
        //isConnected() method returns the connected state of the socket
        System.out.println("The socket is connected: "+socket.isConnected());
        //isBound() method returns the binding state of the socket
        int data=90;
        //sendUrgentData() method sends one byte of urgent data on the socket.
        socket.sendUrgentData(data);
        System.out.println("Data has been sent successfully...");

    }
}

Test it Now

Output:

The socket is connected: true
Data has been sent successfully...

Example 2

import java.io.IOException;
import java.net.*;
public class JavaSocketSendUrgentDataExample2  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        InetAddress inetAddress=InetAddress.getByName("localhost");
        //the port should be greater or equal to 0, else it will throw an error
        int port=1085;
        //calling the constructor of the SocketAddress class
        SocketAddress socketAddress=new InetSocketAddress(inetAddress, port);
        //binding the socket with inetAddress and port
        socket.bind(socketAddress);
        //the connection will not establish without binding the socket with bind() method
        socket.connect(socketAddress);
        //isConnected() method returns the connected state of the socket
        System.out.println("The socket is connected: "+socket.isConnected());
        //closing the socket
        socket.close();
        int data=0;
        //sendUrgentData() method sends one byte of urgent data on the socket.
        socket.sendUrgentData(data);
        //it will throw an IOException, as the socket is closed
        System.out.println("Data has been send successfully...");
    }
}

Test it Now

Output:

Exception in thread "main" java.io.IOException: Socket Closed
The socket is connected: true
	at java.net.AbstractPlainSocketImpl.sendUrgentData(AbstractPlainSocketImpl.java:591)
	at java.net.PlainSocketImpl.sendUrgentData(PlainSocketImpl.java:262)
	at java.net.Socket.sendUrgentData(Socket.java:1067)
	at com.javaTpoint.JavaSocketSendUrgentDataExample2.main(JavaSocketSendUrgentDataExample2.java:23)

Example 3

import java.io.IOException;
import java.net.*;
public class JavaSocketSendUrgentDataExample3  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //isConnected() method returns the connected state of the socket
        System.out.println("The socket is connected: "+socket.isConnected());
        //closing the socket
        if (socket.isConnected()) {
            int data = 0;
            //sendUrgentData() method sends one byte of urgent data on the socket.
            socket.sendUrgentData(data);
            //it will throw an SocketException, as the socket is not connected
            System.out.println("Data has been send successfully...");
        }
        else{
            System.out.println("Socket is not connected...");
            System.out.println("Please connect the socket with a valid socket address and port number");
        }
    }
}

Test it Now

Output:

The socket is connected: false
Socket is not connected...
Please connect the socket with a valid socket address and port number

Next TopicJava Socket Class

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Java Socket sendUrgentData() method

Syntax

Parameter

Return

Throws

Example 1

Example 2

Example 3

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