How to remove deprecated DefaultHttpClient in Java?

package com.kt4study.apache.http; import java.io.IOException; import java.nio.charset.StandardCharsets; import java.security.NoSuchAlgorithmException; import javax.net.ssl.SSLContext; import org.apache.http.Header; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.auth.AuthenticationException; import org.apache.http.auth.UsernamePasswordCredentials; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.config.Registry; import org.apache.http.config.RegistryBuilder; import org.apache.http.conn.socket.ConnectionSocketFactory; import org.apache.http.conn.socket.PlainConnectionSocketFactory; import org.apache.http.conn.ssl.NoopHostnameVerifier; import org.apache.http.conn.ssl.SSLConnectionSocketFactory; import org.apache.http.impl.auth.BasicScheme; import org.apache.http.impl.client.HttpClientBuilder; import org.apache.http.impl.client.HttpClients; import org.apache.http.impl.conn.PoolingHttpClientConnectionManager; import org.apache.http.util.EntityUtils; /**  * @author kt4study.blogspot.co.uk  *   */ public class DeprecatedHTTPClient {   public static void removeDepricatedHTTPClientDemo()        throws AuthenticationException, ClientProtocolException, IOException, NoSuchAlgorithmException {          /*//Depricated DefaultHttpClient           HttpClient httpClient = new org.apache.http.impl.client.DefaultHttpClient();     HttpGet httpGetRequest = new HttpGet("http://kt4study.blogspot.co.uk/");     HttpResponse response = client.execute(request);     */          HttpClient httpClient = HttpClientBuilder.create().build();     //Change your URL     HttpGet httpGetRequest = new HttpGet("http://kt4study.blogspot.co.uk");     UsernamePasswordCredentials credential = new UsernamePasswordCredentials("username", "password");          //HTTP/HTTPS Basis Authentication     Header header = new BasicScheme(StandardCharsets.UTF_8).authenticate(credential, httpGetRequest, null);     httpGetRequest.addHeader(header);     //Set SSL  for Authentication     final SSLConnectionSocketFactory sslConnectionSocketFactory =              new SSLConnectionSocketFactory(SSLContext.getDefault(),NoopHostnameVerifier.INSTANCE);          final Registry<ConnectionSocketFactory> registry = RegistryBuilder         .<ConnectionSocketFactory> create()         .register("http", new PlainConnectionSocketFactory())         .register("https", sslConnectionSocketFactory).build();     final PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(registry);     connectionManager.setMaxTotal(100);     httpClient = HttpClients.custom().setSSLSocketFactory(sslConnectionSocketFactory)         .setConnectionManager(connectionManager).build();     //Execute httpClient after setting SSL     HttpResponse httpResponse = httpClient.execute(httpGetRequest);     HttpEntity responseEntity = httpResponse.getEntity();     //Http Response into String     String response = EntityUtils.toString(responseEntity);     System.out.println("HTTP Response Message :: " + response);   }   public static void main(String[] args)        throws AuthenticationException, ClientProtocolException, NoSuchAlgorithmException, IOException {     DeprecatedHTTPClient.removeDepricatedHTTPClientDemo();   } }