Lambda Expressions

Code

import java.util.*;

// No parameters
Runnable r = () -> System.out.println("Hello");

// Single parameter
List<String> names = List.of("Alice", "Bob", "Charlie");
names.forEach(name -> System.out.println(name));

// Method reference
names.forEach(System.out::println);

// Two-parameter sort
List<String> sorted = new ArrayList<>(names);
sorted.sort((a, b) -> a.compareTo(b));

// Functional interface
@FunctionalInterface
interface MathOperation {
    int operate(int a, int b);
}
MathOperation add = (a, b) -> a + b;
MathOperation mul = (a, b) -> a * b;

Explanation

Lambda expressions simplify the implementation of functional interfaces, making code more concise.

More Java Snippets