Java Sleep sleepRandom(long floor, long ceiling)

Description

Sleeps between floor and ceiling milliseconds, chosen randomly

License

LGPL

Declaration

public static void sleepRandom(long floor, long ceiling) 

Method Source Code

//package com.java2s;
//License from project: LGPL 

public class Main {
    /** Sleeps between floor and ceiling milliseconds, chosen randomly */
    public static void sleepRandom(long floor, long ceiling) {
        if (ceiling - floor <= 0) {
            return;
        }/*from  w  w  w  .  j  a  v a  2 s.  c om*/
        long diff = ceiling - floor;
        long r = (int) ((Math.random() * 100000) % diff) + floor;
        sleep(r);
    }

    /** Returns a random value in the range [1 - range] */
    public static long random(long range) {
        return (long) ((Math.random() * range) % range) + 1;
    }

    /** Sleep for timeout msecs. Returns when timeout has elapsed or thread was interrupted */
    public static void sleep(long timeout) {
        try {
            Thread.sleep(timeout);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }

    public static void sleep(long timeout, int nanos) {
        try {
            Thread.sleep(timeout, nanos);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }

    /**
     * On most UNIX systems, the minimum sleep time is 10-20ms. Even if we specify sleep(1), the thread will
     * sleep for at least 10-20ms. On Windows, sleep() seems to be implemented as a busy sleep, that is the
     * thread never relinquishes control and therefore the sleep(x) is exactly x ms long.
     */
    public static void sleep(long msecs, boolean busy_sleep) {
        if (!busy_sleep) {
            sleep(msecs);
            return;
        }

        long start = System.currentTimeMillis();
        long stop = start + msecs;

        while (stop > start) {
            start = System.currentTimeMillis();
        }
    }
}

Related

1. sleepQuietly(long millis)
2. sleepQuietly(long millis)
3. sleepQuietly(long ms)
4. sleepQuite(long millis)
5. sleepRandMs(int ms)
6. sleepRandom(long timeout)
7. sleepSafely(final long millis)
8. sleepSilently(int millis)
9. sleepSilently(int millis)