• java.lang.IllegalArgumentException: Comparison method violates its general contract!

-Djava.util.Arrays.useLegacyMergeSort=true

参考资料

[1]. http://openjdk.java.net/projects/jdk8/features
[2]. http://www.iteye.com/news/28870-java-8-release
[3]. http://winterbe.com/posts/2014/03/16/java-8-tutorial/