Java集合练习2-8， 烦请老师检查并指正～

public class Employee{
 //根据需求完成Employee类的定义  
    private int id;
    private String name;
    private double salary;

    public Employee(){

    }

    public Employee(int id, String name, double salary){
        this.setId(id);
        this.setName(name);
        this.setSalary(salary);
    }

    public void setId(int id){
        this.id = id;
    }

    public int getId(){
        return this.id;
    }

    public void setName(String name){
        this.name = name;
    }

    public String getName(){
        return this.name;
    }

    public void setSalary(double salary){
        this.salary = salary;
    }

    public double getSalary(){
        return this.salary;
    }

}


​import java.util.List;
import java.util.ArrayList;
public class EmployeeTest {
    public static void main(String[] args) {
		//定义ArrayList对象
        ArrayList list = new ArrayList();
        //创建三个Employee类的对象
        Employee emp1 = new Employee(1, "ZhangSan", 5000.0);
        Employee emp2 = new Employee(2, "LiSi", 5500.0);
        Employee emp3 = new Employee(3, "ZhaoLiu", 4000.0);
        //添加员工信息到ArrayList中
        list.add(emp1);
        list.add(emp2);
        list.add(emp3);
        //显示员工的姓名和薪资
        System.out.println("Employee's name and Employee's salary");
        for(int i=0; i <list.size(); i++){
            System.out.println(((Employee)(list.get(i))).getName() + "   " + ((Employee)(list.get(i))).getSalary());
        }
	}
}