* The internal state associated with this pseudorandom number generator. * (The specs for the methods in this class describe the ongoing * computation of this value.) */ private final AtomicLong seed; 1. 2. 3. 4. 5. 6. 多个线程同时获取随机数的时候,会竞争同一个seed,导致了效率的降低。...
1 public class test { 2 public static void main(String[] args) { 3 Calendar c = Calendar.getInstance();//默认是当前日期 4 System.out.println(c); 5 } 6 } 7 8 java.util.GregorianCalendar[time=1615101654795,areFieldsSet=true,areAllFieldsSet=true, lenient=true,zone=sun.util.calendar.Zone...
Methods declared in class java.lang.Object clone,equals,finalize,getClass,hashCode,notify,notifyAll,toString,wait,wait,wait Constructor Detail Random public Random() Creates a new random number generator. This constructor sets the seed of the random number generator to a value very likely to be di...
Exploring Alternative Methods for Java Random Number Generation While the Random class is a robust tool for generating random numbers in Java, it’s not the only game in town. Other methods such as theMath.random()function and third-party libraries also offer unique advantages. Using Math.random...
1. New Methods Added in Java 8 Since Java 8, theRandom,SecureRandomandThreadLocalRandomclasses provide the following methods to generate random numbers between the specified origin (min) and bound (max). In each method, the origin isinclusive, and the bound isexclusive. ...
ThreadLocalRandom class also has some extra utility methods to generate a random number within a range. For example, to generate a random number between 1 and 10, we can do it like below. ThreadLocalRandom random = ThreadLocalRandom.current(); ...
import java.util.Random; public class TestRandom { public static void main(String[] args) { for (int i = 0; i < 10; i++) { System.out.println(getRandomNumberInRange(5, 10)); } } private static int getRandomNumberInRange(int min, int max) { ...
We can generate random values forlonganddoubleby invokingnextLong()andnextDouble()methods in a similar way as shown in the examples above. Java 8 also adds thenextGaussian()method to generate the next normally-distributed value with a 0.0 mean and 1.0 standard deviation from the generator’s seq...
These methods may throw an exception at the time of returning the next integer value. 这些方法在返回下一个整数值时可能会引发异常。IllegalArgumentException: This exception may throw when the given parameter (num<0) is invalid.IllegalArgumentException:当给定参数(num <0)无效时,可能引发此异常。
/** * The internal state associated with this pseudorandom number generator. * (The specs for the methods in this class describe the ongoing * computation of this value.) */ private final AtomicLong seed; 1. 多个线程同时获取随机数的时候,会竞争同一个seed,导致了效率的降低。