IpChecker.java

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

public class IpChecker {

 public static String getIp() throws Exception {
 URL whatismyip = new URL("http://checkip.amazonaws.com");
 BufferedReader in = null;
 try {
 in = new BufferedReader(new InputStreamReader(
 whatismyip.openStream()));
 String ip = in.readLine();
 return ip;
 } finally {
 if (in != null) {
 try {
 in.close();
 } catch (IOException e) {
 e.printStackTrace();
 }
 }
 }
 }
}