What developer blogs or articles can I follow about Java functions?

Java Lambda functions, also known as Lambda expressions, make it possible to write more concise and readable code. They have two types: Lambda expressions, with a single expression that returns a value, and Lambda block declarations, which allow multiple lines of code in the function body. Practical examples: ordering a list, filtering a list and using a functional interface. Mastering Lambda functions allows developers to write more flexible and efficient code.

Dive into the depths of Java Lambda functions: a practical guide

Introduction

Java Lambda functions, also known as Lambda expressions, are a powerful tool that allows you to write more concise and readable code. In this article, we'll dive into the details of Lambda functions, explore their practical uses, and provide real-world examples to help you master this essential feature.

#Lambda Function Syntax

The general syntax of a Lambda function is:

(argumentos) -> expressão

where:

• arguments: The function's input parameters, separated by commas.
• expression: The body of the function, which contains the code to be executed.

Lambda Function Types

There are two main types of Lambda functions:

• Lambda Expressions: Contain only a single expression that returns a value.
• Lambda Block Declarations : Used when you need several lines of code in the function body.

Practical Examples

Let's explore some practical examples to demonstrate usage of Lambda functions:

1. Ordering a List

List<String> nomes = Arrays.asList("João", "Maria", "Pedro");
Collections.sort(nomes, (s1, s2) -> s1.compareTo(s2));

2. Filtering a List

List<Integer> números = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
List<Integer> númerosPares = números.stream()
    .filter(n -> n % 2 == 0)
    .collect(Collectors.toList());

3. Using a Functional Interface

interface Somador {
    int soma(int a, int b);
}

Somador somador = (a, b) -> a + b;
int resultado = somador.soma(3, 5);

Conclusion

Java Lambda functions are a valuable tool for writing more flexible and efficient code. By understanding their syntax and types and exploring real-world examples, you can make the most of the power of Lambda functions in your projects.

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