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URL getDefaultPort() method in Java with Examples
  • Last Updated : 27 Dec, 2018

The getDefaultPort() function of URL class returns the default port of a specified URL. If the URL scheme or the URLStreamHandler for the URL do not define a default port number then the function returns -1.

Function Signature

public int getDefaultPort()

Syntax

url.getDefaultPort()

Parameter This function does not require any parameter

Return Value: The function returns an Integer value which is the default port of the specified URL.



Below examples will illustrate the use of getDefaultPort() function:

Example 1 Default port of HTTPS




// Java program to show the use
// of the function getDefaultPort()
  
import java.net.*;
  
class GFG {
    public static void main(String args[])
    {
  
        // url  object
        URL url = null;
  
        try {
  
            // create a URL
            url = new URL("https:// www.geeksforgeeks.org");
  
            // get the default port
            int default_port = url.getDefaultPort();
  
            // display the URL
            System.out.println("URL: " + url);
  
            // display the default port
            System.out.println("Default Port: "
                               + default_port);
        }
  
        // if any error occurs
        catch (Exception e) {
  
            // display the error
            System.out.println(e);
        }
    }
}
Output:
URL: https:// www.geeksforgeeks.org
Default Port: 443

Example 2: Default port of HTTP




// Java program to show the use
// of the function getDefaultPort()
  
import java.net.*;
  
class GFG {
    public static void main(String args[])
    {
        // url  object
        URL url = null;
  
        try {
            // create a URL
            url = new URL("http:// www.geeksforgeeks.org");
  
            // get the default port
            int default_port = url.getDefaultPort();
  
            // display the URL
            System.out.println("URL: " + url);
  
            // display the default port
            System.out.println("Default Port: "
                               + default_port);
        }
  
        // if any error occurs
        catch (Exception e) {
  
            // display the error
            System.out.println(e);
        }
    }
}
Output:
URL: http:// www.geeksforgeeks.org
Default Port: 80

Example 3 Default port of FTP




// Java program to show the use
// of the function getDefaultPort()
  
import java.net.*;
  
class GFG {
    public static void main(String args[])
    {
        // url  object
        URL url = null;
  
        try {
  
            // create a URL
            url = new URL("ftp:// www.geeksforgeeks.org");
  
            // get the default port
            int default_port = url.getDefaultPort();
  
            // display the URL
            System.out.println("URL: " + url);
  
            // display the default port
            System.out.println("Default Port: "
                               + default_port);
        }
  
        // if any error occurs
        catch (Exception e) {
  
            // display the error
            System.out.println(e);
        }
    }
}
Output:
URL: ftp:// www.geeksforgeeks.org
Default Port: 21

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