apache-commons-collection

Java Commons Collections removeAll

December 15, 2023 by Tarik

Edit January 1, 2014 Apache Commons Collections 4.0 was finally released on November 21, 2013, and contains a fix for this issue. Link to CollectionUtils.java Lines in question (1688 – 1691), with acknowledgement the method was previously broken: /* … * @since 4.0 (method existed in 3.2 but was completely broken) */ public static <E> … Read more

How to convert a Collection to List?

September 26, 2022 by Tarik

List list = new ArrayList(coll); Collections.sort(list); As Erel Segal Halevi says below, if coll is already a list, you can skip step one. But that would depend on the internals of TreeBidiMap. List list; if (coll instanceof List) list = (List)coll; else list = new ArrayList(coll);