import java.util.List;

import java.util.ArrayList;

public class Demo {

    public static void main(String[] args) {

        List<String> list = new ArrayList<>();

        list.add("张无忌");

        list.add("周芷若");

        list.add("赵敏");

        list.add("张强");

        list.add("张三丰");

        //普通写法

        List<String> zhangList = new ArrayList<>();

        for (String name : list) {

            if (name.startsWith("张") && name.length() == 3) {

                System.out.println(name);

            }

        }

        //流式写法

        list.stream()

                .filter(s -> s.startsWith("张"))

                .filter(s -> s.length() == 3)

                .forEach(s ->System.out.println(s));

    }

}