java 核心技术卷一笔记 6 .1接口 lambda 表达式…

1 public int ComparaTo(Object otherObject)
2 {
3     Employee other (Employee) otherObject;
4     return Double.compare(salary, other.salary);
5 }

1 class Employee implements Comparable<Employee>{
2 public int ComparaTo(Employee other)
3 {
4     return Double.compare(salary, other.salary);
5 }
}

 1 package cc.openhome;
 2 import java.util.Arrays;
 3 public class JieKou {
 4     public static void main(String[] args) {
 5         // TODO code application logic here
 6         Employee[] staff =new Employee[3];
 7         staff[0] =new Employee("harry Hacker", 75000);
 8         staff[1]=new Employee("Carl Cracker", 355000);
 9         staff[2]=new Employee("Tony Tester", 228000);
10         Arrays.sort(staff);
11         for(Employee e:staff)
12             System.out.println("name="+e.getName()+",salarry="+e.getSalary());
13     } 
14 }
15 class Employee  implements Comparable<Employee>
16 {
17     private String name;
18     private double salary;
19     public Employee(String name,double salary)
20     {
21         this.name =name;
22         this.salary=salary;
23     }
24     public String getName()
25     {
26         return name ;
27     }
28     public double getSalary()
29     {
30         return salary;
31     }
32     public void raiseSalary(double byPercent)
33     {
34         double raise =salary*byPercent/100;
35         salary +=raise;
36     }
37     public int compareTo(Employee other)
38     {
39         return Double.compare(salary,other.salary);
40     }  
41 }