This is a sample program to convert URI (Uniform Resource Identifiers) to URL (Uniform Resource Locator).

 import java.net.*;

public class DemoConvertURItoURL {

    public static void main(String[] args) {
        URI uri = null;
        URL url = null;
        String uriString = "http://www.google.co.in/";
        // Create a URI object
        try {
            uri = new URI(uriString);
        } catch (URISyntaxException e) {
            e.printStackTrace();
        }

        // Convert the absolute URI to a URL object
        try {
            url = uri.toURL();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }

        //print the URI and URL 
        System.out.println("Original URI  : " + uri);
        System.out.println("Converted URL : " + url);

    }

}