Get host from URL

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;

public class MainClass {

    public static void main(String[] args) {
        try {
            InputStreamReader isr = new InputStreamReader(System.in);
            BufferedReader br = new BufferedReader(isr);
            String line;

            while ((line = br.readLine()) != null && line.length() != 0) {
                URL url = new URL(line);
                System.out.println(url.getHost());
            }

            br.close();
            isr.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}