Java Socket getReuseAddress () method

The getReuseAddress () method of Java Socket class tests whether the SO_REUSEADDR option is enabled or not. It throws SocketException if finds an error in the underlying protocol, such as a TCP error.

Syntax

Parameter

Return

The getReuseAddress () method returns a Boolean value 'true' if the SO_REUSEADDR is enabled else it returns false.

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 JavaSocketGetReuseAddressExample1 {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket();
        //enabling the SO_REUSEADDR option
        Boolean on=true;
        //setReuseAddress() method enables or disables the SO_REUSEADDR option
        socket.setReuseAddress(on);
        //getReuseAddress() method returns boolean value 'true' if SO_REUSEADDR option is enabled else it return false
        System.out.println("SO_REUSEADDR option is enabled: "+socket.getReuseAddress());
    }
}

Test it Now

Output:

SO_REUSEADDR option is enabled: true

Example 2

import java.io.IOException;
import java.net.*;
public class JavaSocketGetReuseAddressExample2  {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket();
        //getReuseAddress() method returns boolean value 'true' if SO_REUSEADDR option is enabled else it return false
        //by default the getReuseAddress() method returns false
        System.out.println("SO_REUSEADDR option is enabled: "+socket.getReuseAddress());
    }
}

Test it Now

Output:

SO_REUSEADDR option is enabled: false

Example 3

import java.io.IOException;
import java.net.*;
public class JavaSocketGetReuseAddressExample3  {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket();
        //closing the socket
        socket.close();
        //enabling the SO_REUSEADDR option
        Boolean on=true;
        //setReuseAddress() method enables or disables the SO_REUSEADDR option
        socket.setReuseAddress(on);
        //getReuseAddress() method returns boolean value 'true' if SO_REUSEADDR option is enabled else it returns false
        System.out.println("SO_REUSEADDR option is enabled: "+socket.getReuseAddress());
    }
}

Test it Now

Output:

Exception in thread "main" java.net.SocketException: Socket is closed
	at java.net.Socket.setReuseAddress(Socket.java:1448)
	at com.javaTpoint.JavaSocketGetReuseAddressExample3.main(JavaSocketGetReuseAddressExample3.java:13)

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