Eclipse IDE prompts warning on new DefaultHttpClient, mark this class as deprecated.

package com.mkyong.web.controller;
import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
public class WebCrawler {
	public static void main(String[] args) throws Exception {
		HttpClient client = new DefaultHttpClient();
		HttpGet request = new HttpGet("http://mkyong.com");
		HttpResponse response = client.execute(request);
		//...

Solution

Dive into the source code, see this comments :

 * @deprecated (4.3) use {@link HttpClientBuilder}.
 */
@ThreadSafe
@Deprecated
public class DefaultHttpClient extends AbstractHttpClient {
	//...

To solve it, use HttpClientBuilder :

package com.hostingcompass.web.controller;
import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;
public class WebCrawler {
	public static void main(String[] args) throws Exception {
		HttpClient client = HttpClientBuilder.create().build();
		HttpGet request = new HttpGet("http://mkyong.com");
		HttpResponse response = client.execute(request);
		//...