请问下这段代码执行什么功能

问题描述

classBase{protectedintb_data;publicvoidf(intnum1,intnum2){System.out.println(this.b_data+"Base.f()"+num1+""+num2);}publicvoidg(intnum1,intnum2){System.out.println(this.b_data+"Base.g()"+num1+""+num2);}publicBase(){this.b_data=100;}}classSubextendsBase{protectedints_data;publicvoidf(intnum1,intnum2){System.out.println(this.s_data+"Sub.f()"+num1+""+num2);}publicSub(){this.b_data=200;this.s_data=200;}}publicclassPoly{publicstaticvoidtest(Basebase){base.f(10,20);base.g(30,40);}publicstaticvoidmain(String[]args){Basebase1=newBase();Basebase2=newSub();Poly.test(base1);Poly.test(base2);}}

解决方案

解决方案二：
測試繼承關係的範例。
解决方案三：
引用楼主xiyanlengfeng的回复:

classBase{protectedintb_data;publicvoidf(intnum1,intnum2){System.out.println(this.b_data+"Base.f()"+num1+""+num2);}publicvoidg(intnum1,intnum2){System.out.println(this.b_da……

+1
解决方案四：
测试“继承”。
解决方案五：
测试继承