Using and Creating Lists For an ArrayList to be used, it first needs be imported into the program. This is achieved by including the command import java.util.ArrayList; at the top of the program.

Module 1 - Basic Cryptography, Breaking the Caesar Cipher and Object-Oriented Caesar Cipher In this module, I've learned about the basics of cryptography, the science of keeping information private ...

Both Arrays.toString(Object[]) and Arrays.deepToString(Object[]) handle null array gracefully, simply returning a String “null”. I tend to use Java Collections far more than I use Java arrays.