Java 7: Encog throws exception on some GA's

[jeffheaton]

The following error is thrown on some GA's when Encog is run under Java 7.

Got this error when I ran the Lunar Lander Example:

Exception in thread "main" java.lang.IllegalArgumentException: Comparison method violates its general contract!
at java.util.ComparableTimSort.mergeLo(Unknown Source)
at java.util.ComparableTimSort.mergeAt(Unknown Source)
at java.util.ComparableTimSort.mergeCollapse(Unknown Source)
at java.util.ComparableTimSort.sort(Unknown Source)
at java.util.ComparableTimSort.sort(Unknown Source)
at java.util.Arrays.sort(Unknown Source)
at java.util.Collections.sort(Unknown Source)
at org.encog.ml.genetic.population.BasicPopulation.sort(BasicPopulation.java:445)
at org.encog.neural.networks.training.genetic.NeuralGeneticAlgorithm.(NeuralGeneticAlgorithm.java:134)
at org.encog.examples.neural.lunar.LunarLander.main(LunarLander.java:71)

[jeffheaton]

Fixed issue by adding an equals method and using it inside of compareTo. Was a valid bug that would cause issues with integer scores.