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