Start from length & length() in Java
First of all, can you quickly answer the following question?
Without code autocompletion of any IDE, how to get the length of an array? And how to get the length of a String?
I asked this question to developers of different levels: entry and intermediate. They can not answer the question correctly or confidently. While IDE provides convenient code autocompletion, it also brings the problem of "surface understanding". In this post, I will explain some key concepts about Java arrays.
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