August 2015
Beginner
768 pages
18h 18m
English
Content preview from Android Application Development All-in-One For Dummies, 2nd Edition
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Chapter 4
Object-Oriented Programming in Java
In This Chapter
Using classes with finesse
Working with Java’s classes and interfaces
Being part of Java’s inner circle
Putting your eggs (your file, that is) in a basket
If you remember nothing else about Java, remember these ideas from Chapter 2 of this minibook:
Java is an object-oriented programming language. So, as a developer, your primary goal is to describe objects. Your closely related goal is to describe objects' close cousins — namely, classes. A class is the idea behind a certain kind of thing. An object is a concrete instance of a class.
And if you remember nothing else about those ideas, remember the following two-word summary:
Classes; objects.
Chapter 2 in this minibook covers the highlights of object-oriented programming in Java. This chapter covers some of object-oriented programming’s finer points.
Static Fields and Methods
In Listing 4-1, I reproduce a small portion of the source code of Android’s Toast class.
Listing 4-1: An Unrepresentative Sample of Android’s Toast Class Code
public class Toast {
public ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.