Stream流中forEach方法

• 一、forEach方法

java.util.function.Consumer接口是一个消费型接口。
Consumer接口中包含抽象方法void accept(T t)，意为消费一个指定泛型的数据。

void forEach(Consumer action);

    @Test
    void test8() {
        List peopleList = new ArrayList<>();
        peopleList.add(new People(1, "小王", 1));
        peopleList.add(new People(2, "小李", 2));
        peopleList.add(new People(3, "小张", 2));
        peopleList.add(new People(4, "小皇", 1));

        peopleList.stream().forEach(s -> {
            s.setJgid(s.getJgid()+1);
            System.out.println(s);
        });
    }