Compile Java File: AuthenticatorgetPasswordAuthenticationExample2

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.Authenticator;
import java.net.InetAddress;
import java.net.PasswordAuthentication;
import java.net.URL;
public class AuthenticatorgetPasswordAuthenticationExample2 {
  public static void main(String[] argv) throws Exception {
       passwordvalidator obj = new passwordvalidator();
    Authenticator.setDefault(new passwordvalidator());
    URL url = new URL("https://www.javaTpoint.com");

obj.getPasswordAuthentication();
    BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
    String str;
    while ((str = in.readLine()) != null) {
      System.out.println(str);
    }
    in.close();
  }
}
class Passwordvalidator extends Authenticator {

protected PasswordAuthentication getPasswordAuthentication() {
      // return null because we havent set the server
    String promptString = this.getRequestingPrompt();
    System.out.println(promptString);
    String hostname = this.getRequestingHost();
    System.out.println(hostname);

String username = "name";
    String password = "password";
    return new PasswordAuthentication(username, password.toCharArray());
  }
}

Output

Online Java Compiler By JavaTpoint.com