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Since Java 1.5 (Tiger) the InetAddress class introduces an isReachable() method that can be use to ping or check if the address specified by the InetAddress is reachable.



import java.net.InetAddress;

public class PingExample
{
public static void main(String[] args)
{
try
{
InetAddress address = InetAddress.getByName("172.16.2.0");

// Try to reach the specified address within the timeout
// periode. If during this periode the address cannot be
// reach then the method returns false.
boolean reachable = address.isReachable(10000);

System.out.println("Is host reachable? " + reachable);
} catch (Exception e)
{
e.printStackTrace();
}
}
}