Conversion of Objects

[Rajeev Lochan]

can someone help me in under standing following rules for the conversion of objects

an object of "Oldtype" is to be converted to an object of "Newtype"

1) If an "Oldtype" is an interface and "NewType" is a class "Newtype" should be object
2) If an "Oldtype" is an array and "NewType" is a class "Newtype" should be object
3) If an "Oldtype" is an array and "NewType" is an interface "Newtype" should Cloneable or Serializable

[William Brogden]

Most Important! Objects do NOT get converted or cast. Object references get cast. Some primitives can get converted.
1) casting an interface reference
You can cast an interface reference to Object or to an interface that is a parent of the interface. Thats because everything descends from Object, and interfaces can have a hierarchy.
2) an array reference can be cast to Object class reference
3) an array reference can be cast to Cloneable interface
and Serializable interface if its a primitive array, but I don't remember if reference arrays can be cast to Serializable.
Bill