Set (to work with unique elements)

2. Sets: Working with unique elements

The main implementations are: HashSet, LinkedHashSet and TreeSet.

The main advantage of using sets is efficiency in preventing duplicates and their integration with Lambda expressions for data filtering and processing.

Examples with lambdas:

Set<Integer> numeros = new HashSet<>(Arrays.asList(1, 2, 3, 4, 5));

// Iteração com lambda
numeros.forEach(n -> System.out.print(n + " ")); // 1 2 3 4 5

// Remover elementos com base em uma condição
numeros.removeIf(n -> n % 2 == 0);
System.out.println(numeros); // [1, 3, 5]

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