Reverse image search using Google api - google-image-search

Question

I am trying to write a java program which for loop the image files in a folder and
do reverse image search on google (just trying to do with one image in this question)
I find some example like below and the result will give me a url that preformed the reverse image search.
While I am wondering how can I download one of the image from the result site.
Some things to add is that I have read the new google api(?) and I find that it only allow me to do search 100/day, hence I choose to use the old version(?) although it warn me the method are deprecated.
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
public class ReverseImageSearch{
public static void main(String args[]){
try {
HttpClient client = new DefaultHttpClient();
String url="https://www.google.co.in/searchbyimage/upload";
String imageFile="C:\\Users\\Chan\\Desktop\\pixiv29706591.jpg";
HttpPost post = new HttpPost(url);
MultipartEntity entity = new MultipartEntity();
entity.addPart("encoded_image", new FileBody(new File(imageFile)));
entity.addPart("image_url",new StringBody(""));
entity.addPart("image_content",new StringBody(""));
entity.addPart("filename",new StringBody(""));
entity.addPart("h1",new StringBody("en"));
entity.addPart("bih",new StringBody("179"));
entity.addPart("biw",new StringBody("1600"));
post.setEntity(entity);
HttpResponse response = client.execute(post);
BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
String line = "";
while ((line = rd.readLine()) != null) {
if (line.indexOf("HREF")>0)
System.out.println(line.substring(8));
//Problem:
// get one of the result image from the sites
// and store it in my PC
}
}catch (ClientProtocolException cpx){
cpx.printStackTrace();
}catch (IOException ioex){
ioex.printStackTrace();
}
}
}