What's the Error in this code below?

Question

Why it gets error? and Why method groups is not converted into object?

https://code.sololearn.com/cx09qIMz54bT/?ref=app

Answer 1

On line 26, you call method delete without the parentheses.
It should be:

unbox.delete()

Hope that helps.

Answer 2

@sneeze thank you for your response just now i have corrected it, since there is no paranthesis earlier on method delete,

Here after will create own class to create object

Answer 3

I have seen your code r1c5 is right.

I like to mention.
It is bad practice to call a class program.
This is error prone, since you basically create another instance of program, including the main method.

Please create your own class, to create a any object.

Answer 4

True. The parenthesis were causing the bug.

I just wanted to point out, the bad practice.

Code that shows the expected output is not without bugs or potential bugs.