Java Comparator和Comparabler的区别

一、 Comparable

 1 public class Person implements Comparable<Person>{
 2     public int Age;
 3     public String Name;
 4     public int compareTo(Person o) {
 5         // TODO Auto-generated method stub
 6         return this.Age-o.Age;
 7     }
 8 }
 9 
10 public static void main(String[] args) {
11         // TODO Auto-generated method stub
12         Person[] persons = new Person[2];//List<Person> persons = new ArrayList<Person>();
13         Person person1 = new Person();
14         person1.Age = 32;
15         person1.Name = "wyp";
16         persons[0] = person1;//persons.add(person1);
17         Person person2 = new Person();
18         person2.Age = 12;
19         person2.Name = "lx";
20         persons[1] = person2;//persons.add(person2);
21         
22         Arrays.sort(persons);//Collections.sort(persons);
23         for (Person person : persons) {
24             String content = String.format("Name:%s,Age:%s",person.Name,person.Age);
25             System.out.println("按Age排序");
26             System.out.println(content);
27         }
28     }

二、 Comparator

 1 public class NameSort implements Comparator<Person> {
 2 
 3     @Override
 4     public int compare(Person o1, Person o2) {
 5         // TODO Auto-generated method stub
 6         return o1.Name.compareTo(o2.Name);
 7     }
 8 }
 9 
10 public static void main(String[] args) {
11         // TODO Auto-generated method stub
12         
13         Person[] persons = new Person[2];//List<Person> persons = new ArrayList<Person>();
14         Person person1 = new Person();
15         person1.Age = 32;
16         person1.Name = "wyp";
17         persons[0] = person1;//persons.add(person1);
18         Person person2 = new Person();
19         person2.Age = 12;
20         person2.Name = "lx";
21         persons[1] = person2;//persons.add(person2);
22         
23         Arrays.sort(persons,new NameSort());//Collections.sort(persons,new NameSort());
24         for (Person person : persons) {
25             String content = String.format("Name:%s,Age:%s",person.Name,person.Age);
26             System.out.println("按Name排序");
27             System.out.println(content);
28         }
29     }

posted @ 2013-07-21 16:22  —八戒—  阅读(440)  评论(0)  编辑  收藏  举报