java chapter07-2package employeepublic class YearWoker extends Employee{//重写earnings方法public d
java chapter07-2
package employee;public class YearWoker extends Employee{//重写earnings方法public double earnings(){return 12000;}} java chapter07-2
package employee;public class YearWoker extends Employee{//重写earnings方法public double earnings(){return 12000;}}