finding ip on site? - proxy

Question

hi i want to grab a proxy list from the net and search through it to find working proxy numbers and port. my problem is when i grab the site how to i search through it it identify just the ips and poorts and disragrd the rest? all i got so far doeint work
how do i identify just the proxy numbers and nothing else?? and sorry any help would be appreciated but i am a newb:)
package proxytester;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
public class ProxyTester{
public static void main(String[] args) {
try{
URL grab = new URL("http://www.example.com");
BufferedReader in = new BufferedReader(
new InputStreamReader(grab.openStream()));
String input;
while ((input = in.readLine()) != null) {
if(input.charAt(0)=='n'){// the site starts its proxy list with name but this line throws an error
System.out.println(input);
}else if(input.charAt(0)== ' '){
System.out.println("empty");
}else
continue;
}
in.close();
}catch(MalformedURLException aa){
System.out.println("site error");
}catch (IOException e) {
System.out.println("io error");
}
}//end main
}//end main

Answer 1

I would suggest using regular expressions to find an ip address and the port. Here is a regular expression that is needed: java regex matching ip address and port number as captured groups
This article explains how to use regular expressions in java: http://www.mkyong.com/regular-expressions/how-to-validate-ip-address-with-regular-expression/