title: Do built in java classes like hashmap ever change their serialVersionUID?
body: <p>In a lot of my database entities, i store a serialized hashmap of various values. How likely is it that the built in java hashmap class will change serialVersionUID making it so i can no longer deserialize the hashmaps from the database?</p>
  
  <p>Could this happen with a new java version release?</p>