5.20 面向对象案例分析二

class Employee {
    private long empno;
    private String ename;
    private double salary;
    private double rate;
    public Employee(){}
    public Employee(long empno,String ename,double salary,double rate){
        this.empno = empno;
        this.ename = ename;
        this.salary = salary;
        this.rate = rate;
    }

    public double salaryIncValue(){
        return this.salary * this.rate;
    }

    public double salaryIncResult(){
        this.salary = this.salary * (1 + this.rate);
        return this.salary;
    }

    public String getInfo(){
        return "雇员编号:" + this.empno + ",姓名:" + this.ename + ",薪水:" + this.salary + ",增长率:" + this.rate;
    }

}

public class HelloWorld {
    public static void main(String[] args){
        Employee emp = new Employee(7369L,"史密斯",3000.0,0.3);//7369原本是整型,加上"L"变成了long型
        System.out.println(emp.getInfo());
        System.out.println("工资调整额度:" + emp.salaryIncValue());
        System.out.println("工资调整后金额:" + emp.salaryIncResult());
        System.out.println(emp.getInfo());
    }
    
}