Shelef questions

• Why heap is better than binary tree to represent a priority queue?
• Why I must override clone if i want cloneable class?
• How to declare an array without specific size?
• How to transfer project written in Eclipse?
• Why use heap instead of binary tree when implementing priority queue?
• Iterating over synchronized collection
• Is there a synchronized queue in Java? [closed]
• I used synchronized list, and i still get ConcurrentModificationException [duplicate]
• Why do I need to call setChanged before I notify the observers?

Shelef answers