Lessons

You've reached Level 29

"Hi, Amigo! Today I'm going to tell you about code styles and the importance of code style." "I'll start with what matters most. Java code should be easy to read. The general approach to the code is this: code is written once but read a hundred times." "Suppose you and 10 other programmers are writing an application. You work on the application for three years, with intermediate releases every three months ..."

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"Hi, Amigo!"

"Since developers could come up with classes that describe numbers, they decided to be creative, like real developers." "First, they came up with an abstract Number class, from which Byte, Short, Integer, Long, Float, and Double are derived. It has methods that help convert numbers to other numeric types ..."

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"Hi, Amigo!" "Hi, Kim." "I'm going to tell you about the Boolean type. It's a wrapper for the boolean type, and it's as easy as pie. Here's some simplified code from the Boolean class ..."

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"Hi, Amigo! It's me again. I'd like to tell you about another fairly simple wrapper class. Today we'll be talking about Character, the wrapper for char." "This class is also quite simple ..."

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"Hi, Amigo! I've got another small and interesting topic for you. The Void type." "And why would you need such a type? I mean, I understand void: it's to bring functions and procedures into alignment. We don't have procedures, but we have functions that return void (nothing)." "Yep, but do you remember that Ellie recently told you about the Callable interface?" "Yes ..."

"Hi, Amigo!" "Let's continue our lessons on how to google." "Here are some exercises ..:"