在作业1的Employee和EmployeeDemo两个类基础上修改 1，重写Employee类的toString方法，返回Employee类的相关信...

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在作业1的Employee和EmployeeDemo两个类基础上修改 1，重写Employee类的toString方法，返回Employee类的相关信息的字符串形式 重写Employee类的equals方法，如果两个Employee实例的名字和所属部门相同，返回true； 并在EmployeeDemo类里面验证上述两个方法 2，定义Clerk、Salesman、Engineer三个类，分别继承自Employee 为Salesman增加一个年销售额属性 为Engineer增加一个年消化人月数属性 3，将下面的描述反映到程序里 普通员工年终奖金分配方案为月薪×2 Salesman：销售额×2％+月薪×1.8 Engineer：年消化人月数×300+月薪×2.5 Clerk：月薪×2.5-1 of the Employee in the operation and EmployeeDemo two classes based on the modification 1, rewrite the Employee class toString method to return to Employee class-related information to rewrite the string form of Employee class equals method, if the two examples of Employee s name and their the same sector, return true and EmployeeDemo the above-mentioned two types of authentication methods inside 2, the definition of Clerk, Salesman, Engineer of three categories, respectively, inherited from the Employee as a Salesman for an additional annual sales for an additional attribute for the Engineer who was the number