15.13. Best Practices

Try these first

1. 1.

   What is the main advantage of using Generics in Java?

   Hint

   Think of runtime errors related to types.

2. 2.

   Why is it preferable to declare a List as List instead of ArrayList?

   Hint

   Consider what happens when the implementation changes.

3. 3.

   What is the primary purpose of using Generics in Java?

   • Enhance memory usage
   • Increase type safety
   • Improve runtime speed

   Hint

   Think about errors you want to avoid.

4. 4.

   True or False: Using raw types can lead to ClassCastException.

   • True
   • False

   Hint

   Consider what raw types actually do.

5. 5.

   Write a generic method to find the maximum element in an array of any type.

   Hint

   Consider how you would compare different elements.

6. 6.

   Given a List of strings, write a function that uses Streams to convert all elements to uppercase.

   Hint

   Think about the mapping function and how streams work.