Something

private static LinkedList<String> tryProxies(LinkedList<String> inputProxies) throws IOException {    LinkedList<String> workingProxies = new LinkedList<String>();        for(String currentProxy : inputProxies) {        String tmp[] = currentProxy.split(":");        try {            if(connect(tmp[0], Integer.parseInt(tmp[1]))) {                workingProxies.add(currentProxy);            }        }        catch (Exception e) {}    }        return workingProxies;}