Objects-First with Java: A Practical Introduction using BlueJ, 6th Edition

4. Grouping objects

4 Documented Misconceptions

ArrayListIsArray

ArrayLists are arrays

CannotChainMemberToConstructor

Method calls or field accesses cannot be chained to a constructor invocation

NullIsObject

null is an object

ObjectsMustBeNamed

A variable is needed to instantiate an object