True or False Java 1. The array list is a class of generic data types. 2. A gene

Question

True or False Java

1. The array list is a class of generic data types.
2. A generic type is a primitive.
3. Accessors and mutators are classes
4. It is possible to have interfaces with generic class types.

Considering:
For a class that has a generic type parameter T

<T> follows the class name in the classes header

<T> does not follow the name of the constructors in their definitions

T not <T> can be a data type of data fields, method parameters, method return types, and local variables.

Of these 3 statements above which if any are false?

A. all are false
B. all are true
C. only the last one is false

Explanation / Answer

1.

true

Arraylist is a object of generic data types

2. false

Generics in Java are an entirely compile-time construct - the compiler turns all generic uses into casts to the right type. This is to maintain backwards compatibility with previous JVM runtimes.

3. false

these are methods.

4 b all are true

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