php editor Zimo takes you into the world of Java Lambda expressions and explores its mysteries and fun. Lambda expressions are an important feature introduced in Java 8, which greatly simplifies code writing and improves development efficiency. This article will introduce in detail the basic concepts, grammatical rules and usage of Lambda expressions, leading you to experience this enlightening feast of knowledge, allowing you to master new tools in Java programming and easily cope with various development challenges. Let’s start this exciting journey of discovery together!
(parameters) -> expression
Among them, parameters
are the parameters of the lambda expression, and expression
is the ontology of the lambda expression. For example, the following lambda expression calculates the sum of two numbers:
(a, b) -> a + b
Lambda expressions can be used in various scenarios, such as:
List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5); Collections.sort(numbers, (a, b) -> a - b);
List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5); List<Integer> evenNumbers = numbers.stream() .filter(n -> n % 2 == 0) .collect(Collectors.toList());
Here are some examples of using Lambda expressions:
(a, b) -> a + b
List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5); Collections.sort(numbers, (a, b) -> a - b);
List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5); List<Integer> evenNumbers = numbers.stream() .filter(n -> n % 2 == 0) .collect(Collectors.toList());
List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5); List<String> stringNumbers = numbers.stream() .map(n -> String.valueOf(n)) .collect(Collectors.toList());
tool that can help you write cleaner, more maintainable code. If you haven't used Lambda expressions yet, I highly recommend you Learn and start using them.
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