Java8抽取List對象中的屬性到新List中

演示代碼

List<Student> students = new ArrayList<>();
        Student student1 = new Student();
        student1.setAge(18);
        student1.setName("趙");
        Student student2 = new Student();
        student2.setAge(19);
        student2.setName("錢");
        Collections.addAll(students,student1,student2);
        List<Integer> ages = students.stream().map(Student::getAge).collect(Collectors.toList());
        System.out.println("結果："+ages);

　輸出結果