Which two allow the class Thing to be instantiated using new Thing（）？ A:  public class Thing { } B:  public class Thing { public Thing（） {} } C:  public class Thing { public Thing（void） {} } D:  public class Thing { public Thing（String s） {} } E:  public class Thing { public void Thing（） {} public Thing（String s） {} }

Except __________, there are three public utilities. A: public water service B: public gas service C: public heat service D: public electricity service

阅读以下程序class A{protected: int a=0;public: A(){a=1;}};class B:virtual public A{public: B(){a++;}};class C:virtual public A{public: C(){a+=2;}};class D:public B,public C{public: void print(){ cout< A: 0 B: 1 C: 3 D: 4

_______ are similar to Bank holidays in England, which are established by law. A: Public Festivals B: Public celebrations C: Public holidays D: Public activities

() the truth, I don't like to be laughed at (). A: Tell; public B: To tell; in public C: Telling; in public D: I tell; the public

【单选题】对于下面()类定义,可以通过“new J_Class()”生成类 J_Class 的实例对象。 A. public class J_Class { public J_Class(void) { } } B. public class J_Class { } C. public class J_Class { public J_Class(String s) { } } D. public class J_Class { public void J_Class() { } public J_Class(String s) { } }

下列哪个方法可用于创建一个可运行的类X? A: public class X implements Runnable{ public void run(){......} } B: public class X implements Thread{ public void run(){......} } C: public class X implements Thread{ public int run(){......} } D: public class X extends Runnable{ public void run(){......} }

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(){ }

class Person{} class Student extends Person{ public int id; public int score; public String name; public int getScore() { return score; }

接口中的方法默认的修饰符为（） A: public static B: public static final C: public final D: public staic