Using HTTP head to test a file on the network, but not to download it?

In our application, sometimes we will test whether a file exists, whether a picture exists, but do not go to the real download, especially when the file is relatively large. So this time, how should our code be written? The following is a way to implement the JDK's own API: using the HTTP head method.

Import java.io.IOException;
Import java.net.HttpURLConnection;
Import java.net.MalformedURLException;
Import Java.net.URL;

Import Org.junit.Test;

public class Urltest {

	@Test public
	void Testurl () {
		String urlstr= "https://www.broward.org/EasyPay/ Learning/documents/timecardsschedulessupervuseguide.pdf ";
		try {
			long begin=system.currenttimemillis ();
			URL url=new url (urlstr);
			HttpURLConnection httpurlconnection= (httpurlconnection) url.openconnection ();
			Httpurlconnection.setrequestmethod ("Head");
			int Responsecode=httpurlconnection.getresponsecode ();
			SYSTEM.OUT.PRINTLN ("-----" +responsecode);
			Long End=system.currenttimemillis ();
			System.out.println ("--time Consumed---" + (end-begin));
		} catch (Malformedurlexception e) {
			e.printstacktrace ();
		} catch (IOException e) {
			e.printstacktrace (); c21/>}}}

If the Fiddler 4 is simulated, its message is as follows: