How to download an entire dataset using java?

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Java

I want to make an app that will download all the paper mentioned in the image by taking the domain as input. I have been able to download a single file from some other website but was unable to download a paper form acm digital library. what I need to do is download the entire data set.

Here is the code that I used to download a single file:

String fileName = "1.txt"; //The file that will be saved on your computer
URL link = new URL("http://delivery.acm.org/10.1145/2340000/2333745/p367-rogers.pdf?ip=14.139.236.219&id=2333745&acc=ACTIVE%20SERVICE&key=045416EF4DDA69D9.F1486EDFD37746FC.4D4702B0C3E38B35.4D4702B0C3E38B35&CFID=493229062&CFTOKEN=47839990&__acm__=1427535499_1f0bc4b26af326afb3e683fc4f578624"); //The file that you want to download 
//Code to download
InputStream in = new BufferedInputStream(link.openStream());
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] buf = new byte[2048];
int n = 0;
while (-1!=(n=in.read(buf)))
{
  out.write(buf, 0, n);
}
out.close();
in.close();
byte[] response = out.toByteArray();

FileOutputStream fos = new FileOutputStream(fileName);
fos.write(response);

fos.close();

How can I modify it to download entire data set?
java dataset