Exam 17: Generics

Which of the following statements is true?

Let Point< T > be a generic type.We want to write a method that takes as parameter Point objects whose type parameter is the Number class,or any subclass of Number.We can do this by declaring the type of the method parameter as

The code fragment Class MySArrayList extends ArrayList< String > { }

A generic class

The process of erasure

Erasure is the process of

The process used by the Java compiler to remove generic notation and substitute actual type arguments for formal type parameters is called

Exceptions of a generic type

Suppose that Point< T > is a generic type,and that we have a method of the form Void printPoint(Point< ? > p){ // Code not shown }

Look at the following method header: Void displayPoint(Point< ? super Double > myPoint)Which of the following objects can be passed as an argument to the displayPoint method?

Let Point< T > be a generic type.We want to write a method that takes as parameter Point objects whose type parameter is the Number class,or any superclass of Number.We can do this by writing

An advantage of using generic types is

When a generic class with an unconstrained type parameter is instantiated without specifying an actual type argument,

When you create an instance of a generic class,what types can you pass as arguments for the class type parameters?

The class Public class Point3D< T extends Number > extends Point< T > { } Is an example of

The notation < E implements Comparable< E > >

The declaration Class Point< T extends Number > { } Is an example of

A static method of a generic class

When a generic class is instantiated without specifying an actual type argument,the generic class is being used

A class is generic