• 2022-07-23
    已知类关系如下:ClassEmployee{}ClassManagerextendsEmployee{}ClassDirectorextendsEmployee{}则下列语句正确的是:()。
    A: Employee e=new Manager();
    B: Director d=new  Manager();
    C: Director d =new Employee ();
    D: Manager m=new Director ();
  • A

    内容

    • 0

      The manager showed the new employee ___ to find the supplies.

    • 1

      The manager<br/>showed the new employee ______ to find the supplies. A: what B: where C: that D: which

    • 2

      Who is most likely Rachel Price A: An important client B: A retiring coworker C: A former manager D: A new employee

    • 3

      有如下类的定义,创建Employee对象正确的是() public class Employee{ private int age; private String name; public void Employee(){ } public Employee(int age){ this.age = age; } public Employee(String name){ this.name = name; } } A: Employee e = new Employee( ) B: Employee e = new Employee(10); C: Employee e = new Employee(tom); D: Employee e = new Employee(10,"tom");

    • 4

      import java.io.*; class Person{ public void print(){System.out.print("Person ");} public void printMyGender(String s){ this.print(); System.out.print(s+" "); } } class Gender{ String type="gender"; public void print(Person p){p.printMyGender(type);} } class Female extends Gender{ public Female(){ type="female"; } } class Male extends Gender{ public Male(){ type="male"; } } class Employee extends Person{ public void print(){ System.out.print("Employee ");} } class Manager extends Employee{ public void print(){ System.out.print("Manager ");} } public class Test{ public static void main(String[] args){ Manager man = new Manager(); Employee em = new Employee(); Gender gender1 = new Male(); Gender gender2 = new Female(); gender1.print(man); gender2.print(em); } } 对于以上代码,其运行结果是