The Pair class in Java is a utility class used to store two related objects as a single unit. It’s commonly used in scenarios like returning two values from a method, working with key-value data, or simplifying data structures in coding problems.
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Which Java package provides a built-in Pair class in JavaFX?
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Question 3 of 15
3. Question
Which method is used to access the first element in a JavaFX Pair?
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Question 4 of 15
4. Question
How can you retrieve the second element of a Pair in JavaFX?
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Question 5 of 15
5. Question
What is a common alternative to Pair in Java SE if JavaFX is not available?
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Question 6 of 15
6. Question
Can you create a custom Pair class in Java?
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Question 7 of 15
7. Question
What is the main drawback of using JavaFX’s Pair class in core Java applications?
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Question 8 of 15
8. Question
Which method is overridden in the Pair class to support equality check?
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Question 9 of 15
9. Question
What must be overridden along with equals() to ensure Pair works in HashMap?
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Question 10 of 15
10. Question
Is JavaFX Pair mutable?
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Question 11 of 15
11. Question
How can Pair be useful in competitive programming or coding interviews?
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Question 12 of 15
12. Question
Which of the following is true about a generic Pair class?
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Question 13 of 15
13. Question
In a custom Pair class, which keyword is used to support generic types?
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Question 14 of 15
14. Question
Which of the following libraries also offer a Pair-like class?
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Question 15 of 15
15. Question
What is one major difference between Map.Entry and Pair?
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Summary
The Pair class in Java is useful for grouping two related objects, often seen in data handling, return values, and algorithm problems. While JavaFX offers a basic implementation, developers often use third-party libraries or custom generic classes for broader compatibility.
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