public class Main {
    public static void main(String[] args) {
        //...

        // create a random number generator
        Random random = new Random();
        // generate a random index to select a proxy from the list
        int randomIndex = random.nextInt(proxyList.size());
        // select random proxy
        String randomProxy = proxyList.get(randomIndex);

        // extract proxy host and port based on the random index
        String PROXY_HOST = randomProxy.split(":")[0];
        int PROXY_PORT = Integer.parseInt(randomProxy.split(":")[1]);

    }
}