Java8LambdaSample.java

public class Sample {
    public static void main(String[] args) {
        List<Integer> values = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9);
        
        int result = 0;
        for (int e : values) {
            if (e > 3 && e % 2 == 0) {
                result = e * 2;
                break;
            }
        }
        System.out.println(total);
        
        System.out.println(
            values.stream() // Or, `parallelStream()`.
                .filter(value -> value > 3)
                .filter(Sample::isEven)
                .map(value -> value * 2)
                .findFirst()        
                .orElse(0)
        );
    }
    public static boolean isEven(int number) {
        return number % 2 == 0;
    }
}