Java Socket getReceiveBufferSize() method

The getReceiveBufferSize() method of Java Socket class returns the buffer size (SO_RCVBUF option) for this socket.

Syntax

Parameter

Returns

The getReceiveBufferSize() method returns the buffer size or the SO_RCVBUF option for this socket.

Throws

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

Example 1

import java.io.IOException;
import java.net.*;
public class JavaSocketGetReceiveBufferSizeExample1  {
    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 JavaSocketGetReceiveBufferSizeExample2  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //getReceiveBufferSize() method returns the buffer size set for this socket
        // by default the buffer size of this socket is set to 65536
        System.out.println("Buffer size: "+socket.getReceiveBufferSize());
    }
}

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Output:

Buffer size: 65536

Example 3

import java.io.IOException;
import java.net.*;
public class JavaSocketGetReceiveBufferSizeExample3  {
    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.JavaSocketGetReceiveBufferSizeExample3.main(JavaSocketGetReceiveBufferSizeExample3.java:11)

Example 4

import java.io.IOException;
import java.net.*;
public class JavaSocketGetReceiveBufferSizeExample4  {
    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
        socket.setReceiveBufferSize(10);
        //it will throw an error as the socket is already closed
        //getReceiveBufferSize() method returns the buffer size set 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.JavaSocketGetReceiveBufferSizeExample4.main(JavaSocketGetReceiveBufferSizeExample4.java:12)

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