A.PublicfloatgetNum(){return4.0f;}
B.PublicvoidgetNum(){}
C.PublicvoidgetNum(doubled){}
D.PublicdoublegetNum(floatd){retrun4.0f;}
正确答案:参考B

A.PublicfloatgetNum(){return4.0f;}
B.PublicvoidgetNum(){}
C.PublicvoidgetNum(doubled){}
D.PublicdoublegetNum(floatd){retrun4.0f;}
正确答案:参考B