Persistency Archives - Timo Ernst https://www.timo-ernst.net/blog/tag/persistency/ Developer • YouTuber • Blogger Wed, 05 Sep 2018 13:44:19 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.timo-ernst.net/wp-content/uploads/2021/03/cropped-Timo-Ernst-Small-32x32.jpg Persistency Archives - Timo Ernst https://www.timo-ernst.net/blog/tag/persistency/ 32 32 .remove() and .contains() not working on your Java set? https://www.timo-ernst.net/blog/2011/06/08/remove-and-contains-not-working-on-your-java-set/ https://www.timo-ernst.net/blog/2011/06/08/remove-and-contains-not-working-on-your-java-set/#comments Wed, 08 Jun 2011 18:36:36 +0000 http://www.timo-ernst.net/?p=2850 If you suddenly experience problems callling set.remove() and set.contains() on your Java Set instances, you might be using Hibernate, which replaces your Set instance with its own version (PersistentSet), which uses a HashSet internally to store your data. For example, the problem I faced was the following: Person.java public class Person(){ String _name; public Person(String […]

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