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单选题
现有:  class Guy  {  String greet()  {  return "hi";  } } class Cowboy extends Guy  {  String greet()  {  return. "howdy";}}  class  Wrangler  extends  Cowboy  {  String  greet()  {  return  "orch!"; } }  class Greetings2  {  public  static void main (String  []  args)  {  Guy g=new Wrangler();  Guy g2=new Cowboy();  Wrangler w2=new Wrangler();  System. out .print (g.greet()+g2.greet()+w2 .greet());  }  }  结果是什么?()
A

 hi hi ouch!

B

 ouch!  howdy  ouch!

C

 hi howdy ouch!

D

编译失败

E

运行的咐候有异常抛出


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解析: 暂无解析
更多 “单选题现有:  class Guy  {  String greet()  {  return "hi";  } } class Cowboy extends Guy  {  String greet()  {  return. "howdy";}}  class  Wrangler  extends  Cowboy  {  String  greet()  {  return  "orch!"; } }  class Greetings2  {  public  static void main (String  []  args)  {  Guy g=new Wrangler();  Guy g2=new Cowboy();  Wrangler w2=new Wrangler();  System. out .print (g.greet()+g2.greet()+w2 .greet());  }  }  结果是什么?()A  hi hi ouch!B  ouch!  howdy  ouch!C  hi howdy ouch!D 编译失败E 运行的咐候有异常抛出” 相关考题
考题 现有:classGuy{Stringgreet(){returnhi;}}classCowboyextendsGuy{Stringgreet(){return.howdy;}}classWranglerextendsCowboy{Stringgreet(){returnorch!;}}classGreetings2{publicstaticvoidmain(String[]args){Guyg=newWrangler();Guyg2=newCowboy();Wranglerw2=newWrangler();System.out.print(g.greet()+g2.greet()+w2.greet());}}结果是什么?()A.hihiouch!B.ouch!howdyouch!C.hihowdyouch!D.编译失败E.运行的咐候有异常抛出

考题 阅读下列说明和C++代码,填补代码中的空缺,将解答填入答题纸的对应栏内。 【说明】 以下C++代码实现一个简单的聊天室系统(ChatRoomSystem),多个用户(User)可以向聊天室(ChatRoom)发送消息,聊天室将消息展示给所有用户。类图如图6-1所表示。图6-1 类图【C++代码】 includeiostream include string using namespace std; class User { private: string name; public: User(string name){ (1) =name; } ~User(){} void setName(string name) { this-name=name; } string getName(){ return name; } void sendMessage(string message); }; class ChatRoom { . public: static void showMessage(User* user, string message) { cout[user-getName()] : messageendl; } }; void User::sendMessage(string message) { (2) (this,message); } class ChatRoomSystem{ public: . . void startup() { User* zhang = new User(John); User* li = new User(Leo); zhang-sendMessage(Hi! Leo!); li_sendMessage(Hi! John!); } void join(User* user) { (3) (HeIIo Everyone! l am+user-getName()); } . }; int main(){ ChatRoomSystem*crs= (4) ; crs-startup(); crs-join( (5) (Wayne)); delete crs; } /* 程序运行结果: [John]:Hi! Leo! [Leo]:Hi! John! [Wayne]:Hello Everyone! I am Wayne /*

考题 试题六(共 15 分)阅读下列说明和 C++代码,填补代码中的空缺,将解答填入答题纸的对应栏内。【说明】以下 C++代码实现一个简单的聊天室系统(ChatRoomSystem),多个用户 (User)可以向聊天室(ChatRoom)发送消息,聊天室将消息展示给所有用户。 类图如图 6-1 所表示。 【C++代码】#include#include using namespace std; class User {private:string name; public:User(string name){ (1) =name;}~User(){} void setName(string name) {this->name=name; } string getName(){return name;}void sendMessage(string message); }; class ChatRoom { . public:static void showMessage(User* user, string message) { coutgetName()"] : " zhang->sendMessage("Hi! Leo!");li_>sendMessage("Hi! John!"); }void join(User* user) { (3) ("HeIIoEveryone!l am"+user->getName()); . ;} . };int main(){ChatRoomSystem*crs= (4) ; crs->startup();crs->join( (5) ("Wayne")); delete crs; }/* 程序运行结果: [John]:Hi! Leol [Leo]:Hi! John![Wayne】:Hello Everyone!Iam Wayne/*

考题 现有:  class Tree {  private static String tree = "tree ";  String getTree ()  {  return tree;  }       }  class Elm extends Tree {  private static String tree = "elm ";  public static void main (String  []  args)  {       new Elm() .go (new Tree())  ;      } }  void go (Tree t)  {  String  s =  t.getTree () +Elm.tree  +  tree  +   (new  Elm() .getTree ()) ;      System.out.println (s) ;}     结果为:()                 A、 elm elm elm elmB、 tree elm elm elmC、 tree elm elm treeD、 tree elm tree elm

考题 现有  class Parser extends Utils {  public static void main (String  []  args)  {  try  {  System.out.print (new Parser () .getlnt ("42"))       }  catch (Exception e) {  System.out.println ("Exc") ;  }      }  int getlnt (String arg)  throws Exception  {     return Integer.parselnt (arg) ;      }      }  class Utils {  int getlnt ()  {  return 42;  }     }  结果是什么?()      A、 42ExcB、 ExcC、 42D、编译失败

考题 class Guy { String greet() { return "hi "; } }  class Cowboy extends Guy { String greet() { return "howdy "; } }  class Wrangler extends Cowboy { String greet() { return "ouch! "; } }  class Greetings2 {  public static void main(String [] args) {  Guy g = new Wrangler();  Guy g2 = new Cowboy();  Wrangler w2 = new Wrangler();  System.out.print(g.greet()+g2.greet()+w2.greet());  }  }  结果是什么?() A、hi hi ouch!B、hi howdy ouch!C、ouch! howdy ouch!D、编译失败

考题 class Guy{String greet(){return “hi“}}   class Cowboy extends Guy {String greet(){return“howdy”}}   class Surfer extends Guy {String greet(){return“dudel”}}  class Greetings{   public static void main (string[]args){   Guy[] guy= {new Guy(),new Cowboy(),new Surfer()};   for(Guy 0: guys)   System.out.print(g.green());  }   }   结果为:  A、运行时异常被输出B、第7行出现一个错误,编译失败C、第8行出现一个错误,编译失败D、hi hi hiE、hi hawdy doude

考题 class Mineral {   static String shiny() { return "1"; }   }   class Granite extends Mineral {   public static void main(String [] args) {   String s = shiny() + getShiny();   s = s + super.shiny();   System.out.println(s);   }   static String getShiny() { return shiny(); }   }   结果为:()  A、3B、12C、111D、编译失败

考题 Assume that country is set for each class.  Given:  10. public class Money {  11. private String country, name;  12. public getCountry() { return country; }  13.}  and:  24. class Yen extends Money {  25. public String getCountry() { return super.country; }  26. }  27.  28. class Euro extends Money {  29. public String getCountry(String timeZone) {  30. return super.getCountry();  31. }  32. }  Which two are correct?()A、 Yen returns correct values.B、 Euro returns correct values.C、 An exception is thrown at runtime.D、 Yen and Euro both return correct values.E、 Compilation fails because of an error at line 25.F、 Compilation fails because of an error at line 30.

考题 现有:  class TestFoo f      int x;  String y;  int  getX()  {  return  x;  }     String getY()  {return y;  }      void setX (int  x)  {      int Z=7:      this.x=x;      }      可以添加多少个修饰符来封装此类?()     A、5B、4C、3D、2

考题 11. class Animal { public String noise() { return “peep”; } }  12. class Dog extends Animal {  13. public String noise() { return “bark”; }  14. }  15. class Cat extends Animal {  16. public String noise() { return “meow”; }  17. }  .....  30. Animal animal = new Dog();  31. Cat cat = (Cat)animal;  32. System.out.printIn(cat.noise());  What is the result?() A、 peepB、 barkC、 meowD、 Compilation fails.E、 An exception is thrown at runtime.

考题 现有:  class Guy {String greet()    {return "hi";  }  }  class Cowboy extends Guy  (  String greet()    (  return "howdy  ¨;    )  )  class Surfer extends Guy  (String greet()    (return "dude! ";)) class Greetings  {  public static void main (String  []  args)    {  Guy  []  guys =  ( new Guy(), new Cowboy(), new Surfer()  );  for (Guy g:  guys) System.out.print (g.greet()};  }  }  结果为:() A、 hi howdy dude!B、运行时异常被抛出。C、第7行出现一个错误,编译失败。D、第8行出现一个错误,编译失败。

考题 现有:  1. abstract class Color  {  2.protected abstract  String getRGB();     3.  }     4.  5. public class Blue extends Color  {     6.    //insert code here      7.  }  和四个声明:  public String getRGB()  {  return "blue";  }      String getRGB()  {  return  "blue";  )  private  String getRGB()  {  return  "blue";  }      protected String getRGB()  {  return "blue";  )      分别插入到第6行,有几个可以通过编译?()    A、  0B、  1C、  2D、  3

考题 现有:  class ThreadBoth extends Threaa implements Runnable  {      public void run()  (System.out.print("hi");  }     public static voicl main (String  []  args)  {     Thread tl=new ThreadBoth():      Thread t2 = new Thread (tl):     tl.run():      t2.run():     }          结果为:()      A、 hi hiB、 hiC、编译失败D、运行时异常被抛出

考题 You work as the application developer at Hi-Tech.com. You create a new custom dictionary named MyDictionary. Choose the code segment which will ensure that MyDictionary is type safe?()A、 Class MyDictionary Implements Dictionary (Of String,String)B、 Class MyDictionary Inherits HashTableC、 Class MyDictionary Implements IDictionaryD、 Class MyDictionary End Class Dim t as New Dictionary (Of String, String) Dim dict As MyDIctionary= CType (t,MyDictionary)

考题 单选题class Guy{String greet(){return “hi“}}   class Cowboy extends Guy {String greet(){return“howdy”}}   class Surfer extends Guy {String greet(){return“dudel”}}  class Greetings{   public static void main (string[]args){   Guy[] guy= {new Guy(),new Cowboy(),new Surfer()};   for(Guy 0: guys)   System.out.print(g.green());  }   }   结果为:A 运行时异常被输出B 第7行出现一个错误,编译失败C 第8行出现一个错误,编译失败D hi hi hiE hi hawdy doude

考题 单选题现有:  1. abstract class Color  {  2.protected abstract  String getRGB();     3.  }     4.  5. public class Blue extends Color  {     6.    //insert code here      7.  }  和四个声明:  public String getRGB()  {  return "blue";  }      String getRGB()  {  return  "blue";  )  private  String getRGB()  {  return  "blue";  }      protected String getRGB()  {  return "blue";  )      分别插入到第6行,有几个可以通过编译?()A   0B   1C   2D   3

考题 单选题现有:   class Parser extends Utils {   public static void main(String [] args) {     System.out.print(new Parser().getInt("42"));    }   int getInt(String arg) {  return Integer.parseInt(arg);  }    }   class Utils {     int getInt(String arg) throws Exception { return 42; }    }    结果为()A  42B  编译失败。C  无输出结果。D  运行时异常被抛出。

考题 单选题You work as the application developer at Hi-Tech.com. You create a new custom dictionary named MyDictionary. Choose the code segment which will ensure that MyDictionary is type safe?()A  Class MyDictionary Implements Dictionary (Of String,String)B  Class MyDictionary Inherits HashTableC  Class MyDictionary Implements IDictionaryD  Class MyDictionary End Class Dim t as New Dictionary (Of String, String) Dim dict As MyDIctionary= CType (t,MyDictionary)

考题 单选题现有:  class Tree {  private static String tree = "tree ";  String getTree ()  {  return tree;  }       }  class Elm extends Tree {  private static String tree = "elm ";  public static void main (String  []  args)  {       new Elm() .go (new Tree())  ;      } }  void go (Tree t)  {  String  s =  t.getTree () +Elm.tree  +  tree  +   (new  Elm() .getTree ()) ;      System.out.println (s) ;}     结果为:()A  elm elm elm elmB  tree elm elm elmC  tree elm elm treeD  tree elm tree elm

考题 单选题现有  class Parser extends Utils {  public static void main (String  []  args)  {  try  {  System.out.print (new Parser () .getlnt ("42"))       }  catch (Exception e) {  System.out.println ("Exc") ;  }      }  int getlnt (String arg)  throws Exception  {     return Integer.parselnt (arg) ;      }      }  class Utils {  int getlnt ()  {  return 42;  }     }  结果是什么?()A  42ExcB  ExcC  42D 编译失败

考题 多选题public class X {  public X aMethod() { return this;}  }  public class Y extends X {  }  Which two methods can be added to the definition of class Y?()Apublic void aMethod() {}Bprivate void aMethod() {}Cpublic void aMethod(String s) {}Dprivate Y aMethod() { return null; }Epublic X aMethod() { return new Y(); }

考题 单选题现有:  class TestFoo f      int x;  String y;  int  getX()  {  return  x;  }     String getY()  {return y;  }      void setX (int  x)  {      int Z=7:      this.x=x;      }      可以添加多少个修饰符来封装此类?()A 5B 4C 3D 2

考题 单选题现有:  class Guy  {  String greet()  {  return "hi";  } } class Cowboy extends Guy  {  String greet()  {  return. "howdy";}}  class  Wrangler  extends  Cowboy  {  String  greet()  {  return  "orch!"; } }  class Greetings2  {  public  static void main (String  []  args)  {  Guy g=new Wrangler();  Guy g2=new Cowboy();  Wrangler w2=new Wrangler();  System. out .print (g.greet()+g2.greet()+w2 .greet());  }  }  结果是什么?()A  hi hi ouch!B  ouch!  howdy  ouch!C  hi howdy ouch!D 编译失败E 运行的咐候有异常抛出

考题 单选题现有:  class Guy {String greet()    {return "hi";  }  }  class Cowboy extends Guy  (  String greet()    (  return "howdy  ¨;    )  )  class Surfer extends Guy  (String greet()    (return "dude! ";)) class Greetings  {  public static void main (String  []  args)    {  Guy  []  guys =  ( new Guy(), new Cowboy(), new Surfer()  );  for (Guy g:  guys) System.out.print (g.greet()};  }  }  结果为:()A  hi howdy dude!B 运行时异常被抛出。C 第7行出现一个错误,编译失败。D 第8行出现一个错误,编译失败。

考题 单选题class Guy { String greet() { return "hi "; } }  class Cowboy extends Guy { String greet() { return "howdy "; } }  class Wrangler extends Cowboy { String greet() { return "ouch! "; } }  class Greetings2 {  public static void main(String [] args) {  Guy g = new Wrangler();  Guy g2 = new Cowboy();  Wrangler w2 = new Wrangler();  System.out.print(g.greet()+g2.greet()+w2.greet());  }  }  结果是什么?()A hi hi ouch!B hi howdy ouch!C ouch! howdy ouch!D 编译失败

考题 单选题现有:  class Parser (类)extends(继承) Utils {   public static void main(String [] args) {   System.out.print(输出打印)(new Parser().getInt("42"));  }   int getInt(String arg) {   return Integer.parseInt(arg);    }   }   class Utils {   int getInt(String arg) throws Exception { return 42; }  }   结果为:()A  42B  编译失败。C  无输出结果。D  运行时异常被抛出。

考题 单选题class Mineral {   static String shiny() { return "1"; }   }   class Granite extends Mineral {   public static void main(String [] args) {   String s = shiny() + getShiny();   s = s + super.shiny();   System.out.println(s);   }   static String getShiny() { return shiny(); }   }   结果为:()A 3B 12C 111D 编译失败