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Java net InetAddress isReachable(int) can be used to check if a server is reachable or not

import java.net.InetAddress; public class Main {   public static void main(String[] argv) throws Exception {     InetAddress address = InetAddress.getByName("web.mit.edu");     System.out.println("Name: " + address.getHostName());     System.out.println("Addr: " + address.getHostAddress());     System.out.println("Reach: " + address.isReachable(3000));   } }