That word has many meanings: Scanner; which one are you asking about?
posted 4 years ago
Welcome to the Ranch
Are you planning to write your own Scanner? If not, then it is something you don't need to know. That is an implementation detail, which the principles of programming (e.g. encapsulation) would keep hidden. If you insist on knowing, unzip the src.zip file in your Java® installation folder, and you can read the source code.