public Ping setDelayMillis(int delayBetweenScansMillis) {
        if (delayBetweenScansMillis < 0)
            throw new IllegalArgumentException("Delay cannot be less than 0");
        this.delayBetweenScansMillis = delayBetweenScansMillis;
        return this;
    }
Set the delay between each ping

@param delayBetweenScansMillis - the timeout for each ping in milliseconds
@return this object to allow chaining
library/src/main/java/com/stealthcopter/networktools/Ping.java