https://trac.edgewall.org/ticket/981
#981 (bug : Ticket unmodifiable when its component is deleted) – The Trac Project
bugticketunmodifiablecomponentdeleted
https://www.javamadesoeasy.com/2015/11/hashtable-making-map-unmodifiable-using.html
JavaMadeSoEasy.com (JMSE): Hashtable - making map unmodifiable using Collections.unmodifiableMap in...
You are here : Home / Core Java Tutorials / Collection framework Tutorial in java Hashtable - making map unmodifiable using Collecti...
hashtablemakingmapunmodifiableusing