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单选题
public abstract class Shape { int x; int y; public abstract void draw(); public void setAnchor(int x, int y) { this.x = x; this.y = y; } } and a class Circle that extends and fully implements the Shape class. Which is correct?()
A
Shape s = new Shape(); s.setAnchor(10,10); s.draw();
B
Circle c = new Shape(); c.setAnchor(10,10); c.draw();
C
Shape s = new Circle(); s.setAnchor(10,10); s.draw();
D
Shape s = new Circle(); s->setAnchor(10,10); s->draw();
E
Circle c = new Circle(); c.Shape.setAnchor(10,10); c.Shape.draw();
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更多 “单选题public abstract class Shape { int x; int y; public abstract void draw(); public void setAnchor(int x, int y) { this.x = x; this.y = y; } } and a class Circle that extends and fully implements the Shape class. Which is correct?()A Shape s = new Shape(); s.setAnchor(10,10); s.draw();B Circle c = new Shape(); c.setAnchor(10,10); c.draw();C Shape s = new Circle(); s.setAnchor(10,10); s.draw();D Shape s = new Circle(); s-setAnchor(10,10); s-draw();E Circle c = new Circle(); c.Shape.setAnchor(10,10); c.Shape.draw();” 相关考题
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interface?DrawCircle?{? //绘制圆形 public(1) ;}class?RedCircle?implements?DrawCircle?{? ?//绘制红色圆形???????public?void?drawCircle(int?radius,intx,?int?y)??{????????????System.out.println("Drawing?Circle[red,radius:"?+?radius?+",x:"?+?x?+?",y:"?+y+?"]");???????}}class?GreenCircle?implements?DrawCircle?{????//绘制绿色圆形??????public?void?drawCircle(int?radius,?int?x,int?y)?{???????????System.out.println("Drawing?Circle[green,radius:"?+radius+",x:?"?+x+?",y:?"?+y+?"]");??????}}abstract?class?Shape?{????//形状? protected? ? (2)???;? ? public?Shape(DrawCircle?drawCircle)?{? ?this.drawCircle=?drawCircle;? ? ? public?abstract?void?draw();}class?Circle?extends?Shape?{? //圆形? ?private?int?x,y,radius;? public?Circle(int?x,int?y,intradius,DrawCircle?drawCircle)?{? ?(3)???;? this.x?=?x;? ? ? this.y?=?y;? ?this.radius?=radius;? }? ? ?public?void?draw()?{? ? drawCircle.? ?(4)? ?;? ? ? }}public?class?DrawCircleMain?{? public?static?void?main(String[]?args)?{? Shape?redCircle=new?Circle(?100,100,10,? (5) );//绘制红色圆形? Shape?greenCircle=new?Circle(200,200,10,(6) );//绘制绿色圆形? ?redCircle.draw(); greenCircle.draw();? ?}}
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【C++代码】
#include?#include?using?namespace?std;class?DrawCircle?{??????//绘制圆形,抽象类? ? ? public: (1);//定义参数为?int?radius,?int?x,?inty? ?virtual~DrawCircle()?{?}};class?RedCircle:public?DrawCircle?{????//绘制红色圆形? ? ? ? public: void?drawCircle(intradius,?int?x,?int?y)?{cout??drawCircle?=?drawCircle;? }? ?virtual~shape()?{?}? public:? ?virtual?void?draw()?=?0;};class?Circle:public?Shape?{????//圆形? ? private:? ? ?int?x,y,radius;? ? public:? Circle(int?x,inty,int?radius,DrawCircle?*drawCircle)? (3)? {? this->x?=?x;? ?this->y?=?y;? ? this->radius?=?radius; }? ? ? public:? void?draw(){? drawCircle?-> (4); }};int?main(){Shape?*redCirclenew?Circle(100,100,10,????(5)????);//绘制红色圆形? Shape?*greenCircle=new?Circle(100,100,10, (6)??);//绘制绿色圆形redCircle >draw();? ?greenCircle?->draw();? ?return?0;}
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Given: 1. public class ConstOver { 2. public constOver(int x, int y, int z) { 3. } 4. } Which two overload the ConstOver Constructor?()A、 ConstOver() {}B、 protected int ConstOver(){}C、 private ConstOver(int z, int y, byte x ) {}D、 public Object ConstOver(Int x, int y, int z) {}E、 pubic void ConstOver (byte x, byte y, byte z) {}
考题
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考题
public class Parent { int change() {…} } class Child extends Parent { } Which methods can be added into class Child?() A、 public int change(){}B、 int chang(int i){}C、 private int change(){}D、 abstract int chang(){}
考题
public abstract class Shape { private int x; private int y; public abstract void draw(); public void setAnchor(int x, int y) { this.x = x; this.y = y; } } Which two classes use the Shape class correctly?()A、 public class Circle implements Shape { private int radius; }B、 public abstract class Circle extends Shape { private int radius; }C、 public class Circle extends Shape { private int radius; public void draw(); }D、 public abstract class Circle implements Shape { private int radius; public void draw(); }E、 public class Circle extends Shape { private int radius;public void draw() {/* code here */} }F、 public abstract class Circle implements Shape { private int radius;public void draw() { / code here */ } }
考题
多选题public abstract class Shape { private int x; private int y; public abstract void draw(); public void setAnchor(int x, int y) { this.x = x; this.y = y; } } Which two classes use the Shape class correctly?()Apublic class Circle implements Shape { private int radius; }Bpublic abstract class Circle extends Shape { private int radius; }Cpublic class Circle extends Shape { private int radius; public void draw(); }Dpublic abstract class Circle implements Shape { private int radius; public void draw(); }Epublic class Circle extends Shape { private int radius;public void draw() {/* code here */} }Fpublic abstract class Circle implements Shape { private int radius;public void draw() { / code here */ } }
考题
单选题public class Parent{ public void change(int x){} } public class Child extends Parent{ //覆盖父类change方法 } 下列哪个声明是正确的覆盖了父类的change方法?()A
protected void change(int x){}B
public void change(int x, int y){}C
public void change(String s){}D
public void change(int x){}
考题
多选题public class ConstOver { public ConstOver (int x, int y, int z) { } } Which two overload the ConstOver constructor?()AConstOver ( ) { }BProtected int ConstOver ( ) { }CPrivate ConstOver (int z, int y, byte x) { }DPublic Object ConstOver (int x, int y, int z) { }EPublic void ConstOver (byte x, byte y, byte z) { }
考题
单选题现有 public class Parentt public void change (int x){) ) public class Child extends Parent{ //覆盖父类change方法 } 下列哪个声明是正确的覆盖了父类的change方法?()A
protected void change (int x){}B
public void change(int x, int y){}C
public void change (int x){}D
public void change (String s){}
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