lambda 表达式从集合中获取某个字段属性的集合

最新推荐文章于 2024-02-14 17:51:28 发布

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博客围绕lambda表达式展开，介绍其从集合中获取某个字段属性集合的相关内容，在信息技术领域，lambda表达式是一种简洁高效的编程方式，可用于处理集合数据。

@Data
public class SchoolBoy {
	private String girlId;
	
	private String id;
	
	private String name;
 
	private String grilName;
}

public class Test3 {

    public static void main(String[] args) {
        List<SchoolBoy> schoolBoys = new ArrayList<>();
        SchoolBoy boy1 = new SchoolBoy();
        boy1.setGirlId("1");
        boy1.setId("10");
        boy1.setName("小明");

        SchoolBoy boy2 = new SchoolBoy();
        boy2.setGirlId("2");
        boy2.setId("11");
        boy2.setName("小豪");

        SchoolBoy boy3 = new SchoolBoy();
        boy3.setGirlId("3");
        boy3.setId("12");
        boy3.setName("小白");
        schoolBoys.add(boy1);
        schoolBoys.add(boy2);
        schoolBoys.add(boy3);

        List<String> ids = schoolBoys.stream().map(schoolBoy -> schoolBoy.getId()).collect(Collectors.toList());
        System.out.println(ids);

        List<String> ids2 = schoolBoys.stream().map(SchoolBoy::getId).collect(Collectors.toList());
        System.out.println(ids2);

    }
}