diff options
| -rw-r--r-- | nlpsolver/ThirdParty/EvolutionarySolver/src/net/adaptivebox/global/RandomGenerator.java | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/nlpsolver/ThirdParty/EvolutionarySolver/src/net/adaptivebox/global/RandomGenerator.java b/nlpsolver/ThirdParty/EvolutionarySolver/src/net/adaptivebox/global/RandomGenerator.java index b59b0f8b19ed..d7fafc9b9046 100644 --- a/nlpsolver/ThirdParty/EvolutionarySolver/src/net/adaptivebox/global/RandomGenerator.java +++ b/nlpsolver/ThirdParty/EvolutionarySolver/src/net/adaptivebox/global/RandomGenerator.java @@ -22,7 +22,13 @@ package net.adaptivebox.global; +import java.util.Random; + public class RandomGenerator { + /** + * Pseudo-random number generator instance. + */ + private static Random PRNG = new Random(); /** * This function returns a random integer number between the lowLimit and @@ -34,8 +40,7 @@ public class RandomGenerator { * @return int return value Example: for find [0,1,2] */ public static int intRangeRandom(int lowLimit, int upLimit) { - int num = (int) Math - .floor(doubleRangeRandom(lowLimit, upLimit + 1) - 1E-10); + int num = lowLimit + PRNG.nextInt(upLimit - lowLimit + 1); return num; } @@ -49,7 +54,7 @@ public class RandomGenerator { * @return double return value */ public static double doubleRangeRandom(double lowLimit, double upLimit) { - double num = lowLimit + Math.random() * (upLimit - lowLimit); + double num = lowLimit + PRNG.nextDouble() * (upLimit - lowLimit); return num; } |