给出以下代码,请问以下哪些语句放置在第六行会引起编译错误?( )1.class Super{2.public float getNum(){return 3.0f;}3.}4.5.public class Sub extends Super{6.7}请选择一个正确答案。
A: (1)public float getNum() {return 4.0f;}
B: (2)public void getNum(){}
C: (3) public void getNumdouble (){}
D: (4)public double getNumfoat (){return 4.0d;}
A: (1)public float getNum() {return 4.0f;}
B: (2)public void getNum(){}
C: (3) public void getNumdouble (){}
D: (4)public double getNumfoat (){return 4.0d;}
举一反三
- 现有如下代码 1: class Super{ 2: public float getNum(){return 3.0f;} 3: } 4: public class Sub extends Super{ 5: 6: } 在第5行加入下列哪行代码后会导致程序编译错误 A: public float getNum(){return 4.0f;} B: public void getNum(){} C: public void getNum(double d){} D: public double getNum(float d){return 4.0d;}
- 现有如下代码[br][/br]class Super{ [br][/br] public float getNum(){return 3.0f;} [br][/br] } [br][/br]public class Sub extends Super{ [br][/br] //【代码】[br][/br]} [br][/br]在【代码】标注行加入下列哪行代码后会导致程序编译错误 A: public float getNum(){return 4.0f;} B: public void getNum(){} C: public void getNum(double){} D: public double getNum(float d){return 4.0d;}
- } [br][/br]在第5行加入下列哪行代码后会导致程序编译错误 A: public float getNum(){return 4.0f;} B: public void getNum(){} C: public void getNum(double D: {} <br> <br>public double getNum(float d){return 4.0d;}
- Which two are void examples of method overriding? () A: void setVar(float f) { x = f;} B: public void setVar(int f) { x =f;} C: public void setVar(float f) {return f;} D: public double setVar(float f) {return f;} E: protected float setVar() { x = 3.0f; return 3.0f; }
- 下列代码中,将引入编译错误的行是1 public class Exercise{2 public static void main(String args[]){3 float f = 0.0 ;4 f = f + 1.0 ;5 }6 }