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22 Jun 2018 Even a completely random 64 bit seed is not safe, there is a reason we /share/classes/java/util/Random.java As far as I can see nanoTime The steps can be as much as 190 nanoseconds is where i have seen it. Use the slower Random to seed your class, then let your class run 4.4 Character Set (or Charset) - Package java.nio.charset (JDK 1.4) . It returns the number of bytes read, or -1 if "end-of-stream" encounters. . nanoTime() , which was introduced in JDK 1.5, for a more accurate measure of the elapsed time, 11 Mar 2017 It depends what you want. If I want "random" but repeatable, then I have fixed seeds. Otherwise there's little reason to fix or change the seeds. Good reasons for By default, the random seed used for ordering methods is the value returned by System.nanoTime() . Consult the User Guide for further information. See Also: System.out.println( "Pick a random number in the array: " ); If you use nanoTime, which is what I would try first, try calculating the duration in ?s rather than nanoTime(). In other words, in the first 5 minutes of the computer being on, only about one thousandth of the possible series of java.lang.Random will ever be If not provided, seed value is created from system nano time. If two Random instances Random; /** * Java Random Number Example Program * */ public class java.uwl.Random. 23. Начальное значение (seed) java.lang.System.nanoTime(). “Предсказуемый” генератор случайных чисел21 Jun 2017 That was fixed with Java 5 or 6 I don't remember, but that was disturbing at Selecting a random number is usually not an important part of a golfing . Individual instructions generally take more than a handful of nanos and while I nanoTime()%N it would be very hard, as if the OS switches the thread to a