What is collection breaking in java?

Question

Java

Couldn't find a clear explanation. There is something in Bruce Eckel in his philosophy. But it's not entirely clear. I would be grateful for an intelligible explanation. Thanks

Answer 1

I am almost not familiar with java, but perhaps you meant Java Collections Framework?

Answer 2

Perhaps it means thread-unsafe behavior? See ConcurrentModificationException

Answer 3

I can assume that we are talking about the incorrect behavior of collections when the equals / hashCode contract is not fulfilled. For example HashMap undertakes to work correctly only if this pair of methods is implemented correctly.