23.7.1. Benefits of Immutability

Try these first

1. 1.

   What does immutability mean in programming?

   Hint

   Think about whether the object's state can change.

2. 2.

   Provide an example of an immutable class in Java.

   Hint

   Consider the structure of a Java class.

3. 3.

   What is an immutable object?

   • An object that can be modified after creation
   • An object that cannot change once created
   • An object that can hold multiple types

   Hint

   Think about the meaning of the prefix 'im-' in immutability.

4. 4.

   True or False: Immutable objects can have their properties modified after they are created.

   • True
   • False

   Hint

   Reflect on the definition of immutability.

5. 5.

   Design an immutable class for a Rectangle that includes width and height. Ensure all properties are final, and no setters are provided.

   Hint

   Think about how to declare fields and constructor methods.

6. 6.

   Assess the performance trade-offs of using immutable objects in a high-frequency trading application.

   Hint

   Consider the frequency of updates that need to happen.