//通过两种比较器排序//比较器////Comparable:自然排序使用//  规则：//   this属性  参数对象o属性 比较//   this > o 正数//   this < o 负数//   this == o 0////Comparator：外部比较器////////--------------------------------------//Comparable 和 Comparator区别：//1.位置。//  Comparable  代码写在要比较的类中；//  Comparator  代码写在要比较的类外；//2.个数。//  Comparable  就定义一种；//  Comparator  可以定义多个比较方式。                   import java.util.Arrays;public class TestTel {    public static void main(String[] args) {        Mumber[] mum = new Mumber[3];        Mumber m1 = new Mumber("001", "张三", 500);        Mumber m2 = new Mumber("010", "李四", 1100);        Mumber m3 = new Mumber("006", "王五", 200);        mum[0] = m1;        mum[1] = m2;        mum[2] = m3;        //第一种Comparable 外部比较器        Arrays.sort(mum);        for(Mumber s :mum) {            System.out.println(s);        }        }}class Mumber implements Comparable
     
      {    private String no;    private String name;    private int num;    public String getNo() {        return no;    }    public void setNo(String no) {        this.no = no;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getNum() {        return num;    }    public void setNum(int num) {        this.num = num;    }    public Mumber(String no, String name, int num) {        super();        this.no = no;        this.name = name;        this.num = num;    }    @Override    public int compareTo(Mumber o) {        // TODO Auto-generated method stub        return o.num-this.num;    }    @Override    public String toString() {        return "Student [no=" + no + ", name=" + name + ", num=" + num+"]";    }    }
     

package day13;import java.util.Arrays;import java.util.Comparator;class Employee{    private String name;    private int age;    public Employee(String name, int age) {        super();        this.name = name;        this.age = age;    }    public String getName() {        return name;    }    public int getAge() {        return age;    }    @Override    public String toString() {        return "Employee [name=" + name + ", age=" + age + "]";    }    }public class TestSort2 {    public static void main(String[] args) {        Employee guojing = new Employee("yangkang", 22);        Employee yangkang = new Employee("guojing", 20);        Employee huangrong = new Employee("huangrong", 21);                Employee [] emps = {guojing,yangkang,huangrong};        Arrays.sort(emps, new Comparator
     
      (){            @Override            public int compare(Employee o1, Employee o2) {    /*            if(o1.getName().compareTo(o2.getName()) > 0) {                    return 1;                }else if(o1.getName().compareTo(o2.getName()) < 0) {                    return -1;                }else {                    if(o1.getAge() > o2.getAge() ) {                        return 1;                    }else if(o1.getAge() < o2.getAge()) {                        return -1;                    }else {                        return 0;                    }                }*/              if(o1.getName().compareTo(o2.getName()) == 0) {                    return o1.getAge() - o2.getAge();               }               return o1.getName().compareTo(o2.getName());            }                    });        for(Employee emp : emps) {            System.out.println(emp);        }                    }}