网友您好, 请在下方输入框内输入要搜索的题目:

题目内容 (请给出正确答案)
单选题
定义类:      package utils;      public class Rep{  public static String twice (String s){return s+s ;}     }  再定义另一个类Demo:      //insert code here      public class Demo{  public static void main (String[]  args){      System. out .println( twice( "Hello"));      }      }  在第一行插入哪项代码,可以使程序正常编译和执行?()
A

import utils.*;

B

 import utils.Rep.*;

C

 import static utils.Rep.twice;

D

 static import utils.Rep.twice;


参考答案

参考解析
解析: 暂无解析
更多 “单选题定义类:      package utils;      public class Rep{  public static String twice (String s){return s+s ;}     }  再定义另一个类Demo:      //insert code here      public class Demo{  public static void main (String[]  args){      System. out .println( twice( "Hello"));      }      }  在第一行插入哪项代码,可以使程序正常编译和执行?()A import utils.*;B  import utils.Rep.*;C  import static utils.Rep.twice;D  static import utils.Rep.twice;” 相关考题
考题 若类A和类B的定义如下:includeclass A{int i,j;public:int geti(){return i;}};class 若类A和类B的定义如下: #include<malloc.h> class A { int i,j; public: int geti() { return i; } }; class B:public A { int k; public: void make() { k=i*j; } }; 则上述定义中非法的表达式是( )。A.k=i*jB.int k;C.return i;D.void make();

考题 下列Java源程序结构中前三种语句的次序,正确的是A.import, package, public classB.import必为首,其他不限C.public class, import, packageD.package, import, public class

考题 请将下列类定义补充完整。class Base{public:void fun(){tout<<"Base::fun"<<endl;}};class Derived:public Base{public:void fun(){______//显示调用基类的fun函数cout<<"Derived::fun"<<endl;};

考题 若类A和类B的定义如下class A{int i,j;public:int geti( ){return i;}};class B:public A{int k:public:void make( ){k=i*j;}};则上述定义中非法的语句是A.k=i*jB.int k;C.return i;D.void make()

考题 下列关于Test类的定义中,正确的是______。A) class Test implements Runnabte{public void run(){}public void someMethod(){}B) class Test implements Rnuuable{public void run();}C) class Test implements Rnuuable{public void someMethod();}D) class Test implements Rnuuable{public void someMethod();{}}A.B.C.D.

考题 请将下列类定义补充完整class Base{public: void fun(){cout<<"Base::fun"<<end1;}};class Derived:public Base{public:void fun(){______//显式调用基类的fun函数cout<<"Derived::fun"<<end1;}};

考题 在如下源代码文件Test.java中, 哪个是正确的类定义?() A.public class test { public int x = 0; public test(int x) { this.x = x; } }B.public class Test{ public int x=0; public Test(int x) { this.x = x; } }C.public class Test extends T1, T2 { public int x = 0; public Test (int x) { this.x = x; } }D.public class

考题 下列哪个选项的java源文件代码片段是不正确的?A.package testpackage; public class Test{ }B.import java. io. *; package testpaekage; public class Test { }C.import java.io.*; class Person { } public class Test { }D.import java.io.*; import java. awt.*; public class Test{ }

考题 请将下列类定义补充完整。class Base{public:void fun(){cout<<"Base::fun"<<end;}};class Derived:public Base{public:void fun(){【 】//显式调用基类的fun函数cout<<"Derived::fun"<<endl;}};

考题 若已定义了类Vehicle,则下列派生类定义中,错误的是A.class Car:Vehicle{/*类体略*/);B.class Car:public Car{/*类体略*/);C.class Car:public Vehicle{/*类体略*/);D.class Car:virtual public Vehicle{/*类体略*/);

考题 若类A和类B的定义如下:includeclass A{int i*j;public:int geti(){return i;}};class 若类A和类B的定义如下: #include<malloc.h> class A { int i*j; public: int geti() { return i; } }; class B: public A { int k; public: void make() { k=i*j; } ); 则上述定义中非法的表达式是( )。A.k=i*j;B.int k;C.return i;D.void make();

考题 若类A和类B的定义如下: class A { int i,j; public: int geti() { return i; } }; class B: public A { int k; public: void make() { k=i*j } }; 则上述定义中A.k=i*j;B.int k;C.return i;D.void make()

考题 下列哪个选项的java源文件程序段是不正确的? ( )A.package testpackage; public class Test{ }B.import java.io.*; package testpackage; public class Test{ }C.import java.i.*; class Person{} public class Test{ }D.import java.io.*; import java.awt.*; public class Test { }

考题 在下列源代码文件Test.java中, ( )是正确的类定义。A.public class test{B.public class Test{ public int x=0;public int x=0; public test (intx) public Test (int x){ {this.x=x; this.x=x;} }} }C.public class Test extends T1,T2{D.protected class Test extends T2{ public int=0;public int x=0; public Test(int x){Public Test (int x){ this.x=x;this.x=x: }} }}

考题 在下列源代码文件Test.java中,哪个选项是正确的类定义? ( )A.public class test { public int x=0; public test(int x) { this.x=x; } }B.public class Test { public int x=0; public Test(int x) { this.x=x; } }C.public class Test extends Ti,T2 { public int x=0; public Test(int x) { this.x=x; } }D.protected class Test extends T2 { public int x=0; public Test(int x) { this.x=x; } }

考题 package foo; public class Outer (  public static class Inner (  )  )   Which statement is true? () A、 An instance of the Inner class can be constructed with “new Outer.Inner ()”B、 An instance of the inner class cannot be constructed outside of package foo.C、 An instance of the inner class can only be constructed from within the outer class.D、 From within the package bar, an instance of the inner class can be constructed with “new inner()”

考题 在C#程序中,如果类B要继承类A,类B正确的定义为()。A、public class B inherit AB、public class B :: AC、public class B : AD、public class B from A

考题 下列类的定义中,错误的是()。A、class x{....}B、public x extends y{....}C、public class x extends y{....}D、class x extends y implements y1{....}

考题 package geometry;  public class Hypotenuse {  public InnerTriangle it = new InnerTriangle();  class InnerTriangle {  public int base;  public int height;  }  }  Which is true about the class of an object that can reference the variable base? ()A、 It can be any class.B、 No class has access to base.C、 The class must belong to the geometry package.D、 The class must be a subclass of the class Hypotenuse.

考题 现有:  interface Data {public void load();}  abstract class Info {public abstract void load();}      下列类定义中正确使用Data和Info的是哪项?() A、 public class Employee implements Info extends Data { public void load(){/*dosomething*/}     }B、public class Employee extends Inf.implements Data{ public void load() {/*do something*/}     }C、public class Empl.yee implements Inf extends Data{ public void Data.1oad(){* do something*/}     public void load(){/*do something*/}     }D、public class Employee extends Inf implements Data  {  public void Data.1oad()  {/*do something*/)     public void info.1oad(){/*do something*/}    }

考题 定义类:      package utils;      public class Rep{  public static String twice (String s){return s+s ;}     }  再定义另一个类Demo:      //insert code here      public class Demo{  public static void main (String[]  args){      System. out .println( twice( "Hello"));      }      }  在第一行插入哪项代码,可以使程序正常编译和执行?()     A、import utils.*;B、 import utils.Rep.*;C、 import static utils.Rep.twice;D、 static import utils.Rep.twice;

考题 单选题package geometry;  public class Hypotenuse {  public InnerTriangle it = new InnerTriangle();  class InnerTriangle {  public int base;  public int height;  }  }  Which is true about the class of an object that can reference the variable base? ()A  It can be any class.B  No class has access to base.C  The class must belong to the geometry package.D  The class must be a subclass of the class Hypotenuse.

考题 单选题下列Java源程序结构中前三种语句的次序,正确的是(  )。A import,package,public classB import必为首,其他不限C public class,package,importD package,import,public class

考题 单选题package foo; public class Outer (  public static class Inner (  )  )   Which statement is true? ()A  An instance of the Inner class can be constructed with “new Outer.Inner ()”B  An instance of the inner class cannot be constructed outside of package foo.C  An instance of the inner class can only be constructed from within the outer class.D  From within the package bar, an instance of the inner class can be constructed with “new inner()”

考题 单选题package foo;  public class Outer {  public static class Inner {  }  }   Which statement is true?()A  Compilation fails.B  An instance of the Inner class can be constructed with “new Outer.Inner()”.C  An instance of the Inner class cannot be constructed outside of package foo.D  An instance of the Inner class can be constructed only from within the Outer class.E  From within the package foo, and instance of the Inner class can be constructed with “new Inner()”.

考题 单选题Given a class Repetition: 1.package utils; 2. 3.public class Repetition{ 4.public static String twice(Strings){returns+s;} 5.} and given another class Demo: 1.//insert code here2. 3.public class Demo{ 4.public static void main(String[]args){ 5.System.out.println(twice("pizza")); 6.} 7.} Which code should be inserted at line 1 of Demo.java to compile and run Demo to print“pizzapizza”?()A import utils.*;B static import utils.*;C importutils.Repetition.*;D static importutils.Repetition.*;E import utils.Repetition.twice();F import static utils.Repetition.twice;G static import utils.Repetition.twice;

考题 单选题Given a class Repetition:  1. package utils;  2.  3. public class Repetition {  4. public static String twice(String s) { return s + s; }  5. }  and given another class Demo:  1. // insert code here 2.  3. public class Demo {  4. public static void main(String[] args) {  5. System.out.println(twice(”pizza”));  6. }  7. }  Which code should be inserted at line 1 of Demo.java to compile and run Demo to print“pizzapizza”?()A  import utils.*;B  static import utils.*;C  import utils.Repetition.*;D  static import utils.Repetition. *;E  import utils.Repetition.twice();F  import static utils.Repetition.twice;G  static import utils.Repetition.twice;