Java Socket getTcpNoDelay() method

The getTcpNoDelay () method of Java Socket class returns the setting for SO_TIMEOUT option if it is enabled, else it returns false.

Syntax

Parameter

Return

The getTcpNoDelay () method returns a Boolean value 'true' if the TCP_NODELAY is enabled.

Throws

SocketException - if an error is there in the underlying protocol, such as a TCP error.

Example 1

import java.io.IOException;
import java.net.*;
public class JavaSocketGetTcpNoDelayExample1  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //enabling the SO_TIMEOUT option
        boolean on=true;
        //setTcpNoDelay() method enables or disables the SO_TIMEOUT option
        socket.setTcpNoDelay(on);
        //getTcpNoDelay() returns the setting for SO_TIMEOUT option
        System.out.println("SO_TIMEOUT option is enabled: "+socket.getTcpNoDelay());
    }
}

Test it Now

Output:

SO_TIMEOUT option is enabled: true

Example 2

import java.io.IOException;
import java.net.*;
public class JavaSocketGetTcpNoDelayExample2  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //getTcpNoDelay() returns the setting for SO_TIMEOUT option
        //the default set for getTcpNoDelay() option is false
        System.out.println("SO_TIMEOUT option is enabled: "+socket.getTcpNoDelay());
    }
}

Test it Now

Output:

SO_TIMEOUT option is enabled: false

Example 3

import java.io.IOException;
import java.net.*;
public class JavaSocketGetTcpNoDelayExample3  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //closing the socket
        socket.close();
        //enabling the SO_TIMEOUT option
        boolean on=true;
        //setTcpNoDelay() method enables or disables the SO_TIMEOUT option
        socket.setTcpNoDelay(on);
        //getTcpNoDelay() returns the setting for SO_TIMEOUT option
        //it will return an error, as the socket is already closed
        System.out.println("SO_TIMEOUT option is enabled: "+socket.getTcpNoDelay());
    }
}

Test it Now

Output:

Exception in thread "main" java.net.SocketException: Socket is closed
	at java.net.Socket.setTcpNoDelay(Socket.java:979)
	at com.javaTpoint.JavaSocketGetTcpNoDelayExample3.main(JavaSocketGetTcpNoDelayExample3.java:14)

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