Main.java

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

class Main {
    public static void main(String[] args) {
        List<Integer> list = Arrays.asList(3, 4, 6, 12, 20);
        List<Integer>  ket_qua = list.stream()
                .filter(num -> {
                    System.out.println(String.format("Gia tri cua num: %s", num));
                    return num > 4;
                }).collect(Collectors.toList());
        System.out.println(String.format("@@Gia tri cua num: %s", ket_qua));
    }
}