java.util.stream.Stream#map

最新推荐文章于 2024-01-03 23:17:40 发布

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本文展示了如何使用Java 8的Stream API对Teacher对象列表进行操作，通过.map()方法提取每个Teacher的name属性并收集到一个字符串列表中。

java.util.stream.Stream#map

遍历取值

Teacher

@Data
@Builder
public class Teacher {
    private String name;
    private Integer age;
}

Solution

public class Solution {
    public static void main(String[] args) {
        Teacher teacherA = new Teacher.TeacherBuilder().name("AA").build();
        Teacher teacherB = new Teacher.TeacherBuilder().name("BB").build();
        Teacher teacherC = new Teacher.TeacherBuilder().name("CC").build();

        ArrayList<Teacher> teacherArrayList = Lists.newArrayList();
        teacherArrayList.add(teacherA);
        teacherArrayList.add(teacherB);
        teacherArrayList.add(teacherC);

        List<String> collect = teacherArrayList.stream().map(Teacher::getName).collect(Collectors.toList());
        System.out.println(JSON.toJSONString(collect));
    }
}