devxlogo

Creating Applet to Ping IP Address

Creating Applet to Ping IP Address

Question:
I would like to create a very simple applet that pings anIP address and returns a message stating whether that IP is alive. Icouldn’t find any straightforward answers to my problem in thejava.netpackage. How can I create a program with Java that performs this task?

Answer:
I created a little client program that opens a connection to the echoserver (always port 7) of a given host (using the domain name insteadof the IP address, hope that’s okay), sends the string “Hello,” readsthe response, then compares it with the string sent:

import java.io.*;import java.net.*;class Ping {   public static void main(String args[]) {      try {         Socket t = new Socket(args[0], 7);         DataInputStream is = new DataInputStream(t.getInputStream());         PrintStream os = new PrintStream(t.getOutputStream());         os.println(“Hello”);         String str = is.readLine();         if (str.equals(“Hello”))           System.out.println(“Alive :-)”) ;         else            System.out.println(“Dead :-(“);         t.close();      }      catch (IOException e) {System.out.println(“Error: ” + e);}   }} 

See also  Is Machine Learning Automating Creativity in Graphic Design?
devxblackblue

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

About Our Journalist