I was experimenting with Random class in Java and, as many others here on Stack Overflow, I noticed that using a seed will always give the same result (and it's okay, seems logic), but I still have a (theoretical) question: what's the real difference between giving a chosen seed and System.currentTimeMillis as seed? Testing the same program, the same time of the day, won't give me the same results after multiple tries?  I know it's really hard for me to obtain the same exact result, but if my program were to be used by millions, or billions of people, few could get the same results in terms of randomization, for example: Imagine a getpoints.exe where you have to click a bottom and get a random amount of points depending on the time of the day. Using Random(System.currentTimeMillis) won't be random over all because two people clicking at the same exact time will get the same amount, so the result won't be really random. The same applies if 1mln people press it simultaneously.  So the original question: are there pseudo-real but more accurate ways to get random numbers?
I was reading the Math.random() javadoc and saw that random is only psuedorandom.    Is there a library (specifically java) that generates random numbers according to random variables like environmental temperature, CPU temperature/voltage, or anything like that?
Iterating through a Collection, avoiding ConcurrentModificationException when removing objects in a loop I want to copy a live production database into my local development database.  Is there a way to do this without locking the production database?  I'm currently using:  mysqldump -u root --password=xxx -h xxx my_db1 | mysql -u root --password=xxx -h localhost my_db1   But it's locking each table as it runs. How to get reflections from 3D to show up on real images Difference between I and Me I am quite confused with the usage of I and me, Can anybody tell me what should be used in the following sentence: Your husband doesn't believe that You're older than (I / Me). What is recordSetVar and where is it used? I was looking at some code and in the 'apex:page' tag, an attribute called recordSetVar was mentioned. I'm new to VisualForce so could someone please tell me when and why is it used? mongodb group values by multiple fields Is there a term for coining a phrase for a word that already exists? When I gain control of a creature, do I also gain control of any auras or equipment attached to it? shade plane with a color function color(x,y) When do the differences between APS-C and full frame sensors matter, and why? Slope of geometry as `fac` input for cycles material I have a terrain with two materials going into a Mix Shader, I want the fac input to be the slope of the terrain. Steep parts should be one color, flat part another. unable to printout arrayOfInt initialised within the class constructor My users are sending me point data that were digitized using Google Earth. How can I convert their KML to a shapefile and vice versa? I know that atan2 gives me the absolute angle of any vector. But it doesn't give a value from 0 to 360 degrees. Instead, it gives a value (if I'm not mistaken), between 0 and 180, or between 0 and -180. For example, instead of giving angle 270, it will say -90.  This is a little confusing for me. Let me try to describe how I think this works, and please tell me if I'm correct. Actually, I'll draw it.    Is this correct? I'm having a little trouble understanding this. Thanks How to access blocked sites? I am in Pakistan and  is blocked here. I want to take the Lecture videos from YouTube. In Windows, I was using  to bypass the proxy.   But now, using Ubuntu, I don't know how to bypass the proxy. I found some where that i can bypass the proxy by using putty software. Can you guide me how can I bypass proxy by that? I tried, but I was not able to do so. Kindly tell me some easy method to bypass proxy. I don't want to used websites like accesstoblockedsites.com. Are punches with Gauntlets of Ogre Strength magical, improvised weapon attacks? My Gnoll Paladin just got the Gauntlets of Ogre Strength from Phandelver the other day, and it got me wondering:    Would it be possible/make sense for punches using them to count as an improvised weapon? (Since I'm not punching with empty fists, I'm wearing magical gauntlets) If so, would punches from a person using them count as magical weapon damage? Why are my objects in all layers? What is the use/meaning of 'swap area' while linux installation? When i installed ubuntu in my x86 machine, I had to configure some memory as 'swap area'.  What is the use of this memory and what is the importance of this memory in linux file systems?  How can I determine the exact size of 'swap area' in a machine for the safe working of linux inside in it? It seems that most people who use the ignored tags feature end up with a fairly long list of those tags.  Although , it is sometimes necessary to add new ignored tags manually (typically when adding some-tag*).  It would be a lot easier if the add box was above the long list of ignored tags rather than below. I suppose the same would apply to the favorites tags for consistency's sake. Finding the limit of $\frac {n}{\sqrt[n]{n!}}$