通过Employee类，认识理解静态域和静态方法，employee静态,这个程序包含了Emplo

通过Employee类，认识理解静态域和静态方法，employee静态,这个程序包含了Emplo

这个程序包含了Employee类的一个简单版本，其中包含一个静态域nextId和一个静态方法getNextId。这里用三个Employee对象填充数组，然后打印员工信息。最后，打印出下一个可用的员工标志码来作为对静态方法使用的演示。

注意：Employee类也有一个静态的main方法用于单元测试。试试运行

java Employee

和

java StaticTest

来执行两个main方法。

package Test;public class StaticTest {    /**     * @param args     */    public static void main(String[] args)     {        // TODO Auto-generated method stub        //fill the staff array with three Employee objects        Employee[] staff = new Employee[3];        staff[0] = new Employee("Tom", 40000);        staff[1] = new Employee("Chris", 60000);        staff[2] = new Employee("Harry", 65000);        //print out information about all Employee objects        for (Employee e:staff)        {            e.setId();            System.out.println("name="+e.getName()+",id="+e.getId()+",salary="+e.getSalary());        }        int n = Employee.getNextId();//calls static method        System.out.println("Next available id="+n);    }}class Employee{    public Employee(String n, double s)    {        name = n;        salary = s;        id = 0;    }    public String getName()    {        return name;    }    public double getSalary()    {        return salary;    }    public int getId()    {        return id;    }    public void setId()    {        id = nextId;//set id to next available id        nextId++;    }    public static int getNextId()    {        return nextId;//returns static field    }    public static void man (String [] args)//unit test    {        Employee e = new Employee("Harry", 50000);        System.out.println(e.getName()+" "+e.getSalary());    }    private String name;    private double salary;    private int id;    private static int nextId = 1;  }//该片段来自于http://byrx.net