Infinite for loop problem

Question

hello there
i'm trying to make a ping program that if the user presses a button
the program pings on a server continusely and print the response
so i used the infinite for loop but when i'm trying to exit the program
it doesn,t exit?how to fix that? here is my code
import java.io.*;
import java.net.*;
import javax.swing.*;
import java.awt.Container;
import java.awt.*;
import java.awt.event.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class ReachableTest2 extends JFrame  {
public static void main(String args[]) {     
JButton btn=new JButton("Check The Ping");          
JFrame frame = new JFrame("Ping Check");
           frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent ev) {
                System.exit(0);
  ActionListener actionlistener=new ActionListener() {
      public void actionPerformed(ActionEvent evnt) {
                  if(evnt.getActionCommand().equals("Check The Ping"))         
                        try {
       InetAddress address = InetAddress.getByName("212.122.224.10");
       System.out.println("Name: " + address.getHostName());
       System.out.println("Addr: " + address.getHostAddress());
       for( ; ; )
       System.out.println("Reach: " + address.isReachable(3000));
     catch (UnknownHostException e) {
       System.err.println("Unable to lookup ");
     catch (IOException e) {
       System.err.println("Unable to reach ");
         frame.add(btn);
         btn.addActionListener(actionlistener);
         frame.setSize(250,150);
        frame.setVisible(true);
         frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
}

Answer 1

hi friend ,
i have made some changes to your code ,i hope this might help let me know if it works for you
import java.io.*;
import java.net.*;
import javax.swing.*;
import java.awt.Container;
import java.awt.*;
import java.awt.event.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class test extends JFrame {
public static void main(String args[]) {
JButton btn=new JButton("Check The Ping");
JFrame frame = new JFrame("Ping Check");
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent ev) {
System.exit(0);
ActionListener actionlistener=new ActionListener() {
public void actionPerformed(ActionEvent evnt) {
     if(evnt.getActionCommand().equals("Check The Ping"))
          ping();
     frame.add(btn);
     btn.addActionListener(actionlistener);
     frame.setSize(250,150);
frame.setVisible(true);
     frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
          public static void ping()
               Runnable r = new pinging();
               Thread t = new Thread(r);
               t.start();
class pinging implements Runnable {
public pinging()
public void run()
try {
               InetAddress address = InetAddress.getByName("212.122.224.10");
               System.out.println("Name: " + address.getHostName());
               System.out.println("Addr: " + address.getHostAddress());
               for( ; ; )
               System.out.println("Reach: " + address.isReachable(3000));
               catch (UnknownHostException e) {
               System.err.println("Unable to lookup ");
               catch (IOException e) {
               System.err.println("Unable to reach ");
Regards