Java - URLConnection getLastModified() Method

Description

The Java URLConnection getLastModified() method returns the value of the last-modified header field. The result is the number of milliseconds since January 1, 1970 GMT.

Declaration

Following is the declaration for java.net.URLConnection.getLastModified() method

public long getLastModified()

Parameters

NA

Return Value

the date the resource referenced by this URLConnection was last modified, or 0 if not known.

Exception

NA

Example 1

The following example shows the usage of Java URLConnection getLastModified() method for a valid url with https protocol. In this example, we're creating an instance of URL class. Using url.openConnection() method, we're getting the URLConnection instance. Using getLastModified(), we're getting the last-modified header field of URLConnection instance and printing the same −

package com.tutorialspoint;

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.time.Instant;
import java.util.Date;

public class UrlConnectionDemo {
   public static void main(String [] args) {
      try {
         URL url = new URL("https://www.tutorialspoint.com");
         URLConnection urlConnection = url.openConnection();
         long headerValue = urlConnection.getLastModified();
         System.out.println("Expires: " + Date.from(Instant.ofEpochMilli(headerValue)));
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

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

Output

Expires: Thu Dec 07 01:29:35 IST 2023

Example 2

The following example shows the usage of Java URLConnection getLastModified() method for a valid url with http protocol. In this example, we're creating an instance of URL class. Using url.openConnection() method, we're getting the URLConnection instance. Using getLastModified(), we're getting the last-modified header field of URLConnection instance and printing the same −

package com.tutorialspoint;

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.time.Instant;
import java.util.Date;

public class UrlConnectionDemo {
   public static void main(String [] args) {
      try {
         URL url = new URL("http://www.tutorialspoint.com");
         URLConnection urlConnection = url.openConnection();
         long headerValue = urlConnection.getLastModified();
         System.out.println("Expires: " + Date.from(Instant.ofEpochMilli(headerValue)));
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

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

Output

Expires: Thu Jan 01 05:30:00 IST 1970

Example 3

The following example shows the usage of Java URLConnection getLastModified() method for a valid url with http protocol. In this example, we're creating an instance of URL class. Using url.openConnection() method, we're getting the URLConnection instance. Using getLastModified(), we're getting the last-modified header field of URLConnection instance and printing the same −

package com.tutorialspoint;

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.time.Instant;
import java.util.Date;

public class UrlConnectionDemo {
   public static void main(String [] args) {
      try {
         URL url = new URL("http://www.google.com");
         URLConnection urlConnection = url.openConnection();
         long headerValue = urlConnection.getLastModified();
         System.out.println("Expires: " + Date.from(Instant.ofEpochMilli(headerValue)));
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

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

Output

Expires: Thu Jan 01 05:30:00 IST 1970