Lone nebula questions

Lone nebula answers

• Updating a List<MyClass> collection based on a new List<MyClass> collection
• Postfix to Infix with minimum number of parentheses
• Java Copy Constructor ArrayLists
• Compiler error on Java generic interface with a List<> method [duplicate]
• How to check if a double value has no decimal part [duplicate]
• Java word filter using regex?
• Polygon shape shrinks when it rotates