现有:1.classAlpha{voidm1(){}&e
现有:
1.classAlpha{voidm1(){}}
2.classBetaextendsAlpha{voidm2(){}}
3.classGammaextendsBeta{}
4.
5.classGreekTest{
6.publicstaticvoidmain(String[]args){
7.Alpha[]a={newAlpha(),newBeta(),newGamma()};
8.for(Alphaa2:a){
9.a2.m1();
10.if(a2instanceofBeta||a2instanceofGamma)
11.//insertcodehere
12.}
13.}
14.}
哪一行代码插入到第11行,将编译但是会在运行时产生异常?()