javaList中如何筛选list中相同的值和筛选不同的值
本篇内容介绍了“java List中如何筛选list中相同的值和筛选不同的值”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!
成都创新互联公司是一家专注于网站建设、做网站与策划设计,华池网站建设哪家好?成都创新互联公司做网站,专注于网站建设十年,网设计领域的专业建站公司;建站业务涵盖:华池等地区。华池做网站价格咨询:13518219792
public class People { private String id; private String somethingElse; public People() { } public People(String id, String somethingElse) { this.id = id; this.somethingElse = somethingElse; } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getSomethingElse() { return somethingElse; } public void setSomethingElse(String somethingElse) { this.somethingElse = somethingElse; } @Override public String toString() { return "People{" + "id='" + id + '\'' + ", somethingElse='" + somethingElse + '\'' + '}'; } }
people实体类和student实体类
People类
student public class Student { private String id; private String idCard; private String somethingElse; public Student() { } public Student(String id, String idCard, String somethingElse) { this.id = id; this.idCard = idCard; this.somethingElse = somethingElse; } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getIdCard() { return idCard; } public void setIdCard(String idCard) { this.idCard = idCard; } public String getSomethingElse() { return somethingElse; } public void setSomethingElse(String somethingElse) { this.somethingElse = somethingElse; } @Override public String toString() { return "Student{" + "id='" + id + '\'' + ", idCard='" + idCard + '\'' + ", somethingElse='" + somethingElse + '\'' + '}'; } }
测试类
public static void main(String[] args) throws Exception{ //初始化数据 ListstudentList = new ArrayList(){{ add(new Student("1", "11", "111")) ; add(new Student("2", "22", "222")); add(new Student("3", "33", "333")); }}; List peopleList = new ArrayList(){ { add(new People("11", "111")); add(new People("222", "222")); add(new People("33", "333")); }}; //获取相同字段内容,转化为set Set ids = peopleList .stream() .map(People::getId) .collect(Collectors.toSet());//过滤重复内容 List result = studentList .stream() .filter(e -> ids.contains(e.getIdCard())) .collect(Collectors.toList()); System.out.println(result); //获取相同字段内容,转化为set Set ids = peopleList .stream() .map(People::getId) .collect(Collectors.toSet());//过滤重复内容 List result = studentList .stream() .filter(e -> !ids.contains(e.getIdCard())) .collect(Collectors.toList()); System.out.println(result); }
“java List中如何筛选list中相同的值和筛选不同的值”的内容就介绍到这里了,感谢大家的阅读。如果想了解更多行业相关的知识可以关注创新互联网站,小编将为大家输出更多高质量的实用文章!
新闻名称:javaList中如何筛选list中相同的值和筛选不同的值
地址分享:http://myzitong.com/article/igdosg.html