print "Content-type: text/plain\n\n";
my $param = 1;
foreach my $fields (@$data) {
   my $name = $param++;
   my $value = join('|', @$fields);
   print "$value\n";
}

##</code><code>##

import java.net.URL;
import java.net.HttpURLConnection;
import java.io.BufferedReader;
import java.io.InputStreamReader;

...

URL url = new URL(getCodeBase(), "/cgi-bin/getmydata.pl"); // or whatever
HttpURLConnection con = (HttpURLConnection) con.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String s;
int count = 0;
while ((s = in.readLine()) != null) {
    String[] fields = s.split("\\|");
    count++;
    // do something with count and fields
}
in.close();
con.disconect();