A: Employee e=new Manager();
B: Director d=new Manager();
C: Director d =new Employee ();
D: Manager m=new Director ();
举一反三
- 已知类的继承关系如下: A: Employee e=new Manager(); B: Director d=new Manager(); C: Director d=new Employee(); D: Manager m=new Director();
- 已知:class Employee;class Manager extends Employee;class Director extends Employee;则以下语句能通过编译的有哪些? A: Employee e = new Manager(); B: Director d = new Manager(); C: Director d = new Employee(); D: Manager m = new Director()
- 已知类的继承关系 class Employee; class Manager extends Employee; class Director extands Employee; class Director extands Employee; 下语句能通过编译的有哪些?
- 已知类的继承关系如下: class Employee; class Manager extends Employee; class Director extends Employee; 则以下语句能通过编译的有哪些?
- class Employee; class Manager extends Employee; class Director extends Employee;
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