import java.net.*;
import java.io.*;

public class Test {
    public static void main(String[] args) throws Exception {

    	
   	URL imgURL = new URL("url to image file");
	
    	
   	String fileName = "img.gif";
	BufferedWriter out = new BufferedWriter(new FileWriter(fileName));
	BufferedReader in = new BufferedReader(
			new InputStreamReader(
					imgURL.openStream()));
	String inputLine;
	while ((inputLine = in.readLine()) != null)
	    	out.write(inputLine);
	in.close(); 
	out.close();
    
    
    	 	
    }
}