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Author Question: Given the following classes and their objects:class C1 {};class C2 extends C1 {};class C3 extends C1 ... (Read 139 times)

Pineapplelove6

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Question 1

Analyze the following code:

Circle c = new Circle (5);
Cylinder c = cy;

◦ The code has a runtime error.
◦ The code has a compile error.
◦ The code is fine.

Question 2

Given the following classes and their objects:

class C1 {};
class C2 extends C1 {};
class C3 extends C1 {};

C2 c2 = new C2();
C3 c3 = new C3();

Analyze the following statement:

c2 = (C2)((C1)c3);

◦ c3 is cast into c2 successfully.
◦ You will get a runtime error because the Java runtime system cannot perform multiple casting in nested form.
◦ You will get a runtime error because you cannot cast objects from sibling classes.
◦ The statement is correct.


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Marked as best answer by Pineapplelove6 on May 6, 2020

onowka

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Pineapplelove6

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  • Posts: 560
Reply 2 on: May 6, 2020
Gracias!


parshano

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Reply 3 on: Yesterday
Excellent

 

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