跟昨天介绍的eclipse-collections一样，这是一个同类产品：
仓库地址：https://github.com/amaembo/streamex
JavaDoc：http://amaembo.github.io/streamex/javadoc/one/util/streamex/package-summary.html
感受下：
代码语言：javascript复制List<String> userNames = StreamEx.of(users).map(User::getName).toList();
Map<Role, List<User>> role2users = StreamEx.of(users).groupingBy(User::getRole);
StreamEx.of(1,2,3).joining("; "); // "1; 2; 3"对比起来好像比eclipse-collections写更少代码
而且更向原生stream靠拢
文档：https://github.com/amaembo/streamex/blob/master/wiki/CHEATSHEET.md
