1) import java.net.InetAddress
2) Modify function isNetworkReachable()
slightly:
public static String isNetworkReachable(){
int timeout = 2000;
String status = "ERROR";
try {
InetAddress address = InetAddress.getByName("10.2.240.74");
if(address.isReachable(timeout)){
status = "SUCCESS";
}
} catch (Exception e) {
e.printStackTrace();
}
return status;
}