Exercise 4.3: Ouput identical with expected output but testcase failed

[kennethSty]

The expected output of the task:
78
12
314
78
12
314
16

My output:

Why do I fail this test case? Are any specific whitespaces required? For reference: I print the area directly via System.out.println(s.area())

[DanLinhHuynh-Niwashi]

There is no white space required, I just directly printed it out just like you.

You may check if your output has an extra return or sth like that?

[jemehgoh]

Check your code for the Rectangle() and Circle() classes on Coursemology. Did you inherit from the Shape() class? (I had this problem with this exercise)

[skylee03]

In addition to public test cases, there are also hidden test cases. Your error may be caused by your OOP implementation not meeting the requirements, such as not having extends Shape.

[DanLinhHuynh-Niwashi]

If the program was successfully built, i think this may not the case.

As you store all of your instances in a list/ array of type Shape.