classTestReference{publicstaticvoidmain(String[]args){intx=2;TestReferencetr=newTestReference();System.out.print(x);tr.change(x);System.out.print(x);}publicvoidchange(intnum){num=num+1;}}程序运行后的输出是哪项()?A.23B.21C.22D.编译错误

classTestReference{publicstaticvoidmain(String[]args){intx=2;TestReferencetr=newTestReference();System.out.print(x);tr.change(x);System.out.print(x);}publicvoidchange(intnum){num=num+1;}}程序运行后的输出是哪项()?

A.23

B.21

C.22

D.编译错误


相关考题:

以下是JAVA中正确的入口方法是?() A.publicstaticvoidmain(String[]args){}B.publicstaticvoidmain(Stringargs){}C.publicvoidmain(String[]args){}D.publicstaticintmain(String[]args){}

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