Java - URL getDefaultPort() Method with Examples

Description

The Java URL getDefaultPort() method returns the default port number of the protocol associated with this URL. If the URL scheme or the URLStreamHandler for the URL do not define a default port number, then -1 is returned.

Declaration

Following is the declaration for java.net.URL.getDefaultPort() method

public int getDefaultPort()

Parameters

NA

Return Value

the port number.

Exception

NA

Example 1

The following example shows the usage of Java URL getDefaultPort() method for a valid url with https protocol. In this example, we're creating an instance of URL class. Now using getDefaultPort() method, we're getting the default port and printing the same −

package com.tutorialspoint;

import java.io.IOException;
import java.net.URL;

public class UrlDemo {
   public static void main(String [] args) {
      try {
         URL url = new URL("https","www.tutorialspoint.com","/index.htm");
         int result = url.getDefaultPort();
         System.out.println(result);
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

Output

443

Example 2

The following example shows the usage of Java URL getDefaultPort() method for a valid url with http protocol. In this example, we're creating an instance of URL class. Now using getDefaultPort() method, we're getting the default port and printing the same −

package com.tutorialspoint;

import java.io.IOException;
import java.net.URL;

public class UrlDemo {
   public static void main(String [] args) {
      try {
         URL url = new URL("http","www.tutorialspoint.com","/index.htm");
         int result = url.getDefaultPort();
         System.out.println(result);
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

Output

80

Example 3

The following example shows the usage of Java URL getDefaultPort() method for a valid url with file protocol. In this example, we're creating an instance of URL class. Now using getDefaultPort() method, we're getting the default port and printing the same −

package com.tutorialspoint;

import java.io.IOException;
import java.net.URL;

public class UrlDemo {
   public static void main(String [] args) {
      try {
         URL url = new URL("file","www.tutorialspoint.com","/index.htm");
         int result = url.getDefaultPort();
         System.out.println(result);
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

Output

-1