Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

public class Main {
    /** Sleeps between floor and ceiling milliseconds, chosen randomly */
    public static void sleepRandom(long floor, long ceiling) {
        if (ceiling - floor <= 0) {
            return;
        }
        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) {
        //the Thread.sleep method is not precise at all regarding nanos
        if (timeout > 0 || nanos > 900000) {
            try {
                Thread.sleep(timeout + (nanos / 1000000), (nanos % 1000000));
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        } else {
            //this isn't a superb metronome either, but allows a granularity
            //with a reasonable precision in the order of 50ths of millisecond
            long initialTime = System.nanoTime() - 200;
            while (System.nanoTime() < initialTime + nanos)
                ;
        }
    }
}