Function, Predicate, Supplier

Lab Java Advanced 30 points

Using java.util.function: a Predicate<Integer> isPositive, a Function<Integer, Integer> triple and a Function made with triple.andThen(x -> x + 1). For each input number print positive?, the tripled value and the composed value.

Input

n, then n integers.

Output

n lines: bool triple composed

Example

Input

Output

true 15 16
false -6 -5
false 0 1

Sample input available Sample output available

Editor

Java

Hints

Predicate.test, Function.apply.

andThen runs one function after another.

Solution explanation

The standard functional interfaces let you pass behaviour around as values and compose it.

Show solution

import java.util.Scanner;
import java.util.function.Function;
import java.util.function.Predicate;

public class Main {
    public static void main(String[] args) {
        Predicate<Integer> isPositive = x -> x > 0;
        Function<Integer, Integer> triple = x -> x * 3;
        Function<Integer, Integer> tripleThenInc = triple.andThen(x -> x + 1);
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        for (int i = 0; i < n; i++) {
            int x = sc.nextInt();
            System.out.println(isPositive.test(x) + " " + triple.apply(x) + " " + tripleThenInc.apply(x));
        }
    }
}

Output

Answer