public static boolean hasNegativeEvenNumbers(Stream<Integer> stream) {
if(stream.filter(x -> x % 2 == 0).anyMatch(x -> x < 0)){
return true;
} else{
return false;
}
}package com.javarush.task.pro.task18.task1817;
import java.util.stream.Stream;
/*
Анализ потока чисел
*/
public class Solution {
public static void main(String[] args) {
String answerYes = "Yes";
String answerNo = "No";
Stream<Integer> stream1 = Stream.of(10, -22, 3, 12, -85, 0, 142);
String answerNegativeEvenNumbers = hasNegativeEvenNumbers(stream1) ? answerYes : answerNo;
System.out.println("Has stream negative even numbers? " + answerNegativeEvenNumbers);
Stream<Integer> stream2 = Stream.of(10, 22, 3, 12, 85, 142);
String answerOnlyPositiveNumbers = hasOnlyPositiveNumbers(stream2) ? answerYes : answerNo;
System.out.println("Has stream only positive numbers? " + answerOnlyPositiveNumbers);
Stream<Integer> stream3 = Stream.of(-10, -22, -3, -12, -85, -142);
String answerOnlyNegativeNumbers = hasOnlyNegativeNumbers(stream3) ? answerYes : answerNo;
System.out.println("Has stream only negative numbers? " + answerOnlyNegativeNumbers);
}
public static boolean hasNegativeEvenNumbers(Stream<Integer> stream) {
if(stream.filter(x -> x % 2 == 0).anyMatch(x -> x < 0)){
return true;
} else{
return false;
}
}
public static boolean hasOnlyPositiveNumbers(Stream<Integer> stream) {
if(stream.allMatch(x -> x > 0)){
return true;
} else{
return false;
}
}
public static boolean hasOnlyNegativeNumbers(Stream<Integer> stream) {
if(stream.noneMatch(x -> x > 0)){
return true;
} else{
return false;
}
}
}