Given:Which code, inserted at line 16, correctly retrieves a local instance of a Point object?() A.Point p = Line.getPoint();B.Line.Point p = Line.getPoint();C.Point p = (new Line()).getPoint();D.Line.Point p = (new Line()).getPoint();
Given:Which code, inserted at line 16, correctly retrieves a local instance of a Point object?()
A.Point p = Line.getPoint();
B.Line.Point p = Line.getPoint();
C.Point p = (new Line()).getPoint();
D.Line.Point p = (new Line()).getPoint();
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若不同范围的变量使用了同名,则按以下哪个顺序查引用的变量() A、Local->Global->Shared-->InstanceB、Global->Local-->Shared-->InstanceC、Shared->Global->Instance->LocalD、Local->Shared->Global->Instance
classLine{11.publicstaticclassPoint{}12.}13.14.classTriangle{15.／／insertcodehere16.}Whichcode,insertedatline15,createsaninstanceofthePointclassdefinedinLine?() A.Pointp=newPoint（）；B.Line.Pointp=newLine.Point（）；C.ThePointclasscannotbeinstatiatedatline15.D.Line1=newLine（）；1.Pointp=new1.Point（）；
阅读下列C++程序和程序说明，将应填入(n)处的字句写在对应栏内。【说明】Point是平面坐标系上的点类，Line是从Point派生出来的直线类。include ＜iostream.h＞class Point{public:Point (int x, int y) ;Point (Point p) ;～Point();void set (double x, double y) ;void print();private:double X,Y;};Point::Point (int x, int y) //Point 构造函数{X=x; Y=y; }Point::Point ( (1) ) //Point 拷贝构造函数{X=p.X; Y=p.Y；}void Point::set (double x, double y){X=x; Y=y; }void Point::print(){cout＜＜' ('＜＜X＜＜","＜＜Y＜＜") "＜＜endl; }Point::～Point(){cout＜＜"Point 的析构函数被调用! "＜＜endl;class Line: public Point{public:Line (int x, int y, int k) ;Line (Line s) ;～Line();void set (double x, double y, double k)void print();private:double K;};(2)//Line 构造函数实现{ K=k;}(3)//Line 拷贝构造函数实现{K=s.K;}void Line::set (double x, double y, double k){ (4);K=k;}void Line::print(){cout＜＜" 直线经过点";(5);cout＜＜"斜率为: k="＜＜K＜＜endl;}Line: :～Line(){cout＜＜"Line 析构函数被调用! "＜＜endl;}void main(){Line 11 (1,1,2) ;11 .print();Linel2 (11) ;12.set (3,2,1) ;12.print();}
Given:Which code, inserted at line 15, creates an instance of the Point class defined in Line?() A.Point p = new Point();B.Line.Point p = new Line.Point();C.The Point class cannot be instatiated at line 15.D.Line l = new Line() ; l.Point p = new l.Point();
Click the Exhibit button.Given:What is the result?() A.Line 26 prints a to System.out.B.Line 26 prints b to System.out.C.An exception is thrown at line 26 at runtime.D.Compilation of class A will fail due to an error in line 6.
Given:When the doSomething method is called, after which line does the Object created in line 5 become available for garbage collection?() A.Line 5B.Line 6C.Line 7D.Line 8E.Line 9F.Line 10
Given:WhichlineofcodemarkstheearliestpointthatanobjectreferencedbyintObjbecomesacandidatefor garbagecollection?() A.Line16B.Line17C.Line18D.Line19
Given：11.publicvoidgenNumbers（）{12.ArrayListnumbers=newArrayList（）；13.for（inti=0；i10；i++）{14.intvalue=i*（（int）Math.random（））；15.IntegerintObj=newInteger（value）；16.numbers.add（intObj）；17.}18.System.out.println（numbers）；19.}WhichlineofcodemarkstheearliestpointthatanobjectreferencedbyintObjbecomesacandidateforgarbagecollection？（）A.Line19B.TheobjectisNOTacandidateforgarbagecollection.C.Line17D.Line16E.Line18
Given:WhichchangecanyoumaketoTargetwithoutaffectingClient?() A.Line4ofclassTargetcanbechangedtoreturni++；B.Line2ofclassTargetcanbechangedtoprivateinti=1；C.Line3ofclassTargetcanbechangedtoprivateintaddOne（）{D.Line2ofclassTargetcanbechangedtoprivateIntegeri=0；