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Description

The Java URLConnection setIfModifiedSince(long ifmodifiedsince) method sets the value of the ifModifiedSince field of this URLConnection to the specified value.

Declaration

Following is the declaration for java.net.URLConnection.setIfModifiedSince(long ifmodifiedsince) method

public void setIfModifiedSince(long ifmodifiedsince)

Parameters

ifmodifiedsince − the new value.

Return Value

NA

Exception

IllegalStateException − if already connected

Example 1

The following example shows the usage of Java URLConnection setIfModifiedSince() 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 getIfModifiedSince(), we're getting the default value of the ifModifiedSince field of URLConnection instance and printing the same. Then using setIfModifiedSince() method we've changed the value of ifModifiedSince field to 100 and printed the same again −

package com.tutorialspoint;

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

public class UrlConnectionDemo {
   public static void main(String [] args) {
      try {
         URL url = new URL("https://www.tutorialspoint.com");
         URLConnection urlConnection = url.openConnection();

         System.out.println(urlConnection.getIfModifiedSince());
         urlConnection.setIfModifiedSince(100L);
         System.out.println(urlConnection.getIfModifiedSince());
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

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

Output

0
100

Example 2

The following example shows the usage of Java URLConnection setIfModifiedSince() 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 getIfModifiedSince(), we're getting the default value of the ifModifiedSince field of URLConnection instance and printing the same. Then using setIfModifiedSince() method, we've changed the value of ifModifiedSince field to 100 and printed the same again −

package com.tutorialspoint;

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

public class UrlConnectionDemo {
   public static void main(String [] args) {
      try {
         URL url = new URL("http://www.tutorialspoint.com");
         URLConnection urlConnection = url.openConnection();

         System.out.println(urlConnection.getIfModifiedSince());
         urlConnection.setIfModifiedSince(100L);
         System.out.println(urlConnection.getIfModifiedSince());
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

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

Output

0
100

Example 3

The following example shows the usage of Java URLConnection setIfModifiedSince() method for a url of google 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 getIfModifiedSince(), we're getting the default value of the ifModifiedSince field of URLConnection instance and printing the same. Then using setIfModifiedSince() method we've changed the value of ifModifiedSince field to 100 and printed the same again −

package com.tutorialspoint;

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

public class UrlConnectionDemo {
   public static void main(String [] args) {
      try {
         URL url = new URL("http://www.google.com");
         URLConnection urlConnection = url.openConnection();

         System.out.println(urlConnection.getIfModifiedSince());
         urlConnection.setIfModifiedSince(100L);
         System.out.println(urlConnection.getIfModifiedSince());
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

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

Output

0
100

java_urlconnection.htm