以下哪一个选项能够实现“狗是人类的一个最好的朋友”?
A: class Man extends Dog { }
B: class Man { private BestFriend dog; }
C: class Man { private Dog bestFriend; }
D: class Man { private Dog; }
A: class Man extends Dog { }
B: class Man { private BestFriend dog; }
C: class Man { private Dog bestFriend; }
D: class Man { private Dog; }
C
举一反三
- 下列各种java类的定义,那种是错误的 A: class Animal{}class Dog extends Animal {} B: final class Animal{}class Dog extends Animal{} C: abstract class Animal{}class Dog extends Animal{} D: public class Animal{}class Dog extends Animal{}
- class Animal { public Animal() { System.out.println("Animal!"); } } public class Dog extends Animal{ public Dog() { System.out.println("Dog!"); } public static void main(String[] args) { Dog dog=new Dog(); } }
- 以下代码运行输出是()class Man {private String n...println(m.name);}}
- "The dog bit the man" and "The man bit the dog" share the same meaning.
- (7-1)定义了Animal类、Cat类和Dog类,则代码段是正确的。 class Animal{ }; class Cat extends Animal{} class Dog extends Animal{}
内容
- 0
public class Dog(){...}下列哪个选项可以是Dog类的构造方法 A: public Dog(){ } B: public void Dog(){ } C: public dog(){ } D: public void dog(){ }
- 1
The dog, which is ______ by the old man, is at the street.
- 2
对于下列Dog类,哪个叙述是错误的? class Dog { Dog(int m){ } Dog(double m){ } int Dog(int m){ return 23; } void Dog(double m){ } }
- 3
在下列程序的划线处应填入的语句是class Person { private int a;}public class Man extends Person{ public int b; public static void main (String arg []){ Person p=new Person(); Man t=new Man(); int i: }} A.i=w; B.i=b C.i=p.a; D.i=t.b;
- 4
中国大学MOOC: 下列Dog类,错误的描述是:class Dog{ Dog(int m){} Dog(double m){} int Dog(int m){ return 1;} void Dog(double m){}}