Java比较接口: Comparator的使用方式

一、新建一个比较器类，实现Comparator接口，T可以不实现其他接口

public class PersonCompartor implements Comparator
{
    @Override
    public int compare(Person o1, Person o2)
    {
        return o1.getAge()-o2.getAge();
    }
}

二、使用比较器来排序

public class Person
{
    String name;
    int age;
    public Person(String name, int age)
    {
        super();
        this.name = name;
        this.age = age;
    }
    public String getName()
    {
        return name;
    }
    public int getAge()
    {
        return age;
    }
    public static void main(String[] args)
    {
        Person[] people=new Person[]{new Person("xujian", 20),new Person("xiewei", 10)};
        System.out.println("排序前");
        for (Person person : people)
        {
            System.out.print(person.getName()+":"+person.getAge());
        }
        Arrays.sort(people,new PersonCompartor());
        System.out.println("n排序后");
        for (Person person : people)
        {
            System.out.print(person.getName()+":"+person.getAge());
        }
    }
}

三、输出结果