import java.util.ArrayList;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;/*** @author silence* 构建一个list集合存储5个学生对象， 过滤年龄小于18的，存入一个新的map集合*/
public class Demo1 {public static void main(String[] args) {ArrayList<Student> list = new ArrayList<>();list.add(new Student("张三", 23));list.add(new Student("李四", 4));list.add(new Student("王五", 25));list.add(new Student("赵六", 12));Map<String, Integer> collect = list.stream().filter(student -> student.getAge() <= 18).collect(Collectors.toMap(Student::getName, Student::getAge));Set<Map.Entry<String, Integer>> maps = collect.entrySet();for (Map.Entry<String, Integer> m : maps) {System.out.println(m.getKey() + "  =  " + m.getValue());}}
}