试题详情
单项选择题 public class Pet{     private String name;     public Pet(){  System.out.print(1);    }  public Pet(String name){        System.out.print(2);    } }  public class Dog extends Pet{     public Dog(){  System.out.print(4);    }  public Dog(String name){        super(name);  System.out.print(3);    } }  执行new Dog(“棕熊”);后程序输出是哪项?()  

A、 33

B、 13

C、 23

D、 123

  • C
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