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 // 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 // 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 // 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
