Java按照List内存储的对象的某个字段进行排序的实例_JAVA教程

Java按照List内存储的对象的某个字段进行排序的实例

2020-07-12 15:36jingxian JAVA教程

下面小编就为大家带来一篇Java按照List内存储的对象的某个字段进行排序的实例。小编觉得挺不错的，现在就分享给大家，也给大家做个参考。一起跟随小编过来看看吧

关键点：将List内存储的对象实现Comparable类，重写它的compareTo（）方法即可

Bean：

									package chc;

									public class StuVo implements Comparable<StuVo>{

									    private String id;

									    private String name;

									    private Integer age;

									    public StuVo(String id, String name, Integer age) {

									        this.id=id;

									        this.name=name;

									        this.age=age;

									    }

									    public int compareTo(StuVo stu) {

									        return this.name.compareTo(stu.getName());

									    }

									    public String getId() {

									        return id;

									    }

									    public void setId(String id) {

									        this.id = id;

									    }

									    public String getName() {

									        return name;

									    }

									    public void setName(String name) {

									        this.name = name;

									    }

									    public Integer getAge() {

									        return age;

									    }

									    public void setAge(Integer age) {

									        this.age = age;

									    }

									}

Demo：

									package chc;

									import java.util.ArrayList;

									import java.util.Collections;

									import java.util.Iterator;

									import java.util.List;

									public class ArrayListSortDemo {

									    public static void main(String[] args) {

									        List<StuVo> stuList=new ArrayList<StuVo>();

									        StuVo stu=new StuVo("1","h小明",11);

									        stuList.add(stu);

									        stu=new StuVo("2","d阿熊",15);

									        stuList.add(stu);

									        stu=new StuVo("3","a张三",10);

									        stuList.add(stu);

									        stu=new StuVo("4","b李四",15);

									        stuList.add(stu);

									        Collections.sort(stuList);

									        Iterator<StuVo> it =stuList.iterator();

									        while(it.hasNext()){

									            System.out.println(it.next().getName());

									        }

									    }

									}