JAvaはIPがpingできるかどうかを判断する

 boolean isIpReachable = false;
    while (!isIpReachable)
    {
        InetAddress address;
        try
        {
            address = InetAddress.getByName("172.17.22.4");
            isIpReachable = address.isReachable(3000);
            System.out.println("Name: " + address.getHostName());
            
            System.out.println("Addr: " + address.getHostAddress());
            
            System.out.println("isIpReachable: " + isIpReachable);
        } 
        catch (UnknownHostException e)
        {
            e.printStackTrace();
        } catch (IOException e)
        {
            e.printStackTrace();
        }
        
    }
    System.out.println("===================================");

    
}