Java之Predicate笔记

    /**
     * Evaluates this predicate on the given argument.
     *
     * @param t the input argument
     * @return {@code true} if the input argument matches the predicate,
     * otherwise {@code false}
     */
    boolean test(T t);

    public static void main(String[] args) {

//        Predicate<Integer> predicate = p -> {
//            return p > 100;
//        };
        Predicate<Integer> predicate = p -> p > 100;

        System.out.println(predicate.test(50));//false
        System.out.println(predicate.test(150));//true
    }
}

过滤出偶数：Predicate作为判断逻辑

    public static void main(String[] args) {
        List<Integer> list = Arrays.asList(1,2,3,4,5,6,7,8,9,10);

        new PredicateTest().findByPredicate(list,p-> p % 2 == 0).forEach(i-> System.out.println(i));
    }

    public List<Integer> findByPredicate(List<Integer> list,Predicate<Integer> predicate){
        return list.stream().filter(predicate).collect(Collectors.toList());
    }