What is the purpose of the Guava Ordering class?
A) To create and manage complex comparison logic
B) To manage database queries
C) To configure HTTP request ordering
D) To sequence method calls in multithreading
Answer:
A) To create and manage complex comparison logic
Explanation:
The Guava Ordering class is used to create and manage complex comparison logic in Java. It extends the Comparator interface and provides a fluent API for chaining and composing multiple comparison strategies. This allows developers to build sophisticated ordering rules for sorting collections.
For example:
Ordering<String> byLength = Ordering.natural().onResultOf(String::length);
List<String> sortedList = byLength.sortedCopy(Arrays.asList("apple", "banana", "pear"));
In this example, the Ordering object is used to sort strings by their length. The Ordering class can handle nulls, reverse orders, and chain multiple comparators, making it a powerful tool for sorting operations.