Java Socket setReceiveBufferSize() method

The setReceiveBufferSize() method of Java Socket class sets the SO_RCVBUF option to the given value for the specified socket. The buffer size should be greater than zero else, it will throw an IllegalArgumentException.

Syntax

Parameter

The parameter 'size' represents the size to which the receive buffer size is to be set.

Return

Throws

IllegalArgumentException - if the size is 0 or less than zero.

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 JavaSocketSetReceiveBufferSizeExample1  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //setting the buffer size with the help of setReceiveBufferSize() method
        socket.setReceiveBufferSize(789);
        //getReceiveBufferSize() method returns the buffer size set for this socket
        System.out.println("Buffer size: "+socket.getReceiveBufferSize());
    }
}

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Output:

Buffer size: 789

Example 2

import java.io.IOException;
import java.net.*;
public class JavaSocketSetReceiveBufferSizeExample2  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //setting the buffer size with the help of setReceiveBufferSize() method
        //the buffer size should be greater than 0, else it will throw an exception
        socket.setReceiveBufferSize(0);
        //getReceiveBufferSize() method returns the buffer size for this socket
        System.out.println("Buffer size: "+socket.getReceiveBufferSize());
    }
}

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Output:

Exception in thread "main" java.lang.IllegalArgumentException: invalid receive size
	at java.net.Socket.setReceiveBufferSize(Socket.java:1267)
	at com.javaTpoint.JavaSocketSetReceiveBufferSizeExample2.main(
	JavaSocketSetReceiveBufferSizeExample2.java:11)

Example 3

import java.io.IOException;
import java.net.*;
public class JavaSocketSetReceiveBufferSizeExample3  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //closing the socket
        socket.close();
        //setting the buffer size with the help of setReceiveBufferSize() method
        //it will throw an exception, as the socket is already closed
        socket.setReceiveBufferSize(10);
        //getReceiveBufferSize() method returns the buffer size for this socket
        System.out.println("Buffer size: "+socket.getReceiveBufferSize());
    }
}

Test it Now

Output:

Exception in thread "main" java.net.SocketException: Socket is closed
	at java.net.Socket.setReceiveBufferSize(Socket.java:1270)
	at com.javaTpoint.JavaSocketSetReceiveBufferSizeExample3.main(
	JavaSocketSetReceiveBufferSizeExample3.java:12)

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