Which statements, when inserted at the indicated position in the following code, will cause a runtime exception when attempting to run the program?() class A {} class B extends A {} class C extends A {} public class Q3ae4 { public static void main(String args[]) { A x = new A(); B y = new B(); C z = new C(); // insert statement here } }
- A、x = y;
- B、z = x;
- C、y = (B) x;
- D、z = (C) y;
- E、y = (A) y;
正确答案:C
答案解析:有
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