Object creation: Point p = new Point(); new allocates storage for an object and the default constructor Point() initializes the Point-object. int-fields x,y are automatically initialized to 0.

But , if you create any other constructor, the compiler doesn’t provide a default constructor So if you create a constructor, make a default constructor too, even if its body is just empty Date Date

Objects Look around you and see objects – desk, people, blackboard, pen, eraser State – hair color, eye color, name, arm length, mouth expression Behavior – move arm; speak; see …

Note: use Ctrl-D to exit searchshell, test on directory of small self-made files

Assignment Destructors Constructors A constructor (ctor) initializes a newly-instantiated object A class can have multiple constructors that differ in parameters Which one is invoked depends …

If possible, disable the copy constructor and assignment operator by declaring as private and not defining them (pre-C++11)

Objects you use Scanner Random ABC System.in nextInt nextDouble next Class blueprint Instance Scanner x = new Scanner(System.in) int y = x.nextInt; nextInt nextDouble next …