Practice Bounded Type Parameters (15.9.4) - Collections and Generics

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9 questions

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6 sample questions

Question 1.
What does the syntax <T extends Number> indicate?
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Think about what types can inherit from Number.
Question 2.
Can we pass a String to a method defined as <T extends Number>?
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Consider the hierarchy of Java classes.
3Question 3.
What does <T extends Number> signify?
- T can be any type
- T must be a subclass of Number
- T can be a superclass of Number
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Reflect on inheritance in Java.
4Question 4.
True or False: Bounded type parameters can help prevent runtime errors.
- True
- False
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Remember how generics enhance type safety.
Question 5.
Implement a method that takes in two types of numbers, Integer and Double, and returns a string describing which one is larger. Use bounded type parameters.
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Ensure proper use of the Comparable interface for comparisons.
Question 6.
Design a generic class Calculator<T extends Number> which can perform addition on any type extending Number.
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Consider how to use the doubleValue() method for numeric operations.

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