【单选题】
publicclassPet{privateStringname;publicPet(){System.out.print(1);}publicPet(Stringname){System.out.print(2);}}publicclassDogextendsPet{publicDog(){System.out.print(4);}publicDog(Stringname){super(name);System.out.print(3);}}执行newDog(棕熊”);后程序输出是哪项?()
举报
参考答案:
参考解析:
举一反三