Java HttpURLConnection setAuthenticator

The setAuthenticator(Authenticator auth) is a method of Java HttpURLConnection class. This method is used to set the authentication request through HTTP protocol. If no authentication is sent then default authentication is used.

Syntax

Parameter

Auth - It is used by this HttpURLConnection.

Throw

UnsupportedOperationException - This exception occurred when implementation of authentication is not supported.

IllegalStateException - This exception occurred when URLConnection is already connected.

NullPointerException - This exception occurred when the supplied auth is null.

Example 1

import java.io.IOException; 
import java.io.InputStream;
import java.net.HttpURLConnection; 
import java.net.URL; 
import java.net.URLConnection;
import java.util.Base64;
public class JavaHttpURLConnectionsetAuthenticatorExample1 {
    //Starting the main method...
    public static void main(String h[]) throws IOException 
    { 
        //starting the try block
        try 
        {
        String link_url ;
        link_url="https://www.javatpoint.com";
        URL url = new URL(link_url);
        URLConnection uc = url.openConnection();
        String password = "123";
        String username = "Javatpoint";
        String userpass = username + ":" + password;
        System.out.println("https://www.javatpoint.com");
        String basicAuth = "Basic :" + new String(Base64.getEncoder().encode(userpass.getBytes()));
        System.out.println(basicAuth);
        uc.setRequestProperty ("Authorization", basicAuth);
        }
        catch (Exception e) 
        {
            System.out.println(e);
        }
    }
}

Test it Now

Output:

https://www.javatpoint.com
Basic :SmF2YXRwb2ludDoxMjM=

Example 2

import java.io.IOException; 
import java.io.InputStream;
import java.net.HttpURLConnection; 
import java.net.URL; 
import java.net.URLConnection;
import java.util.Base64;
public class JavaHttpURLConnectionsetAuthenticatorExample2 {
    //Starting the main method...
    public static void main(String h[]) throws IOException 
    { 
        //starting the try block
        try 
        {
        String link_url ;
        link_url="https://www.facebook.com";
        URL url = new URL(link_url);
        URLConnection uc = url.openConnection();
        String password = "563";
        String username = "facebook";
        String userpass = username + ":" + password;
        System.out.println("https://www.facebook.com");
        String basicAuth = "Basic : " + new String(Base64.getEncoder().encode(userpass.getBytes()));
        System.out.println(basicAuth);
        uc.setRequestProperty ("Authorization", basicAuth);
        }
        catch (Exception e) 
        {
            System.out.println(e);
        }
    }
}

Test it Now

Output:

https://www.facebook.com
Basic : ZmFjZWJvb2s6NTYz

Next TopicJava HttpURLConnection class

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