title: Java 5 - Check whether a network interface is up and running.
body: <p>Java 6 offers isUp() method to check whether a network interface is up and running.</p>
  
  <p><a href="http://docs.oracle.com/javase/6/docs/api/java/net/NetworkInterface.html#isUp" rel="nofollow">http://docs.oracle.com/javase/6/docs/api/java/net/NetworkInterface.html#isUp</a>()</p>
  
  <p>Is there any way to check the same in Java 5?</p>