1.2.2 - Examples of Predefined Functional Interfaces
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Practice Questions
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What is a functional interface?
💡 Hint: Think about how they relate to lambda expressions.
Name one predefined functional interface in Java.
💡 Hint: Consider interfaces used in multitasking or GUI programming.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is a functional interface?
💡 Hint: Remember the definition of a functional interface.
True or False: Runnables can return a value.
💡 Hint: Think of the method signature of Runnable.
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Challenge Problems
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Implement a custom Comparator for sorting integers in descending order and demonstrate its usage with a list of integers.
💡 Hint: How do you reverse the natural order?
Write a small program using both Runnable and Callable, demonstrating the differences in their functionality.
💡 Hint: What does each method return or do when executed?
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