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Kotlin Programming: The Big Nerd Ranch Guide, First Edition
book

Kotlin Programming: The Big Nerd Ranch Guide, First Edition

by Josh Skeen, David Greenhalgh
July 2018
Intermediate to advanced content levelIntermediate to advanced
400 pages
12h 14m
English
Big Nerd Ranch Guides
Content preview from Kotlin Programming: The Big Nerd Ranch Guide, First Edition

The object Keyword

In Chapter 13, you learned about constructing classes. A class constructor returns an instance of a class, and you can call the constructor any number of times to create any number of instances.

For example, NyetHack can have any number of players, because Player’s constructor can be called as many times as you would like. For Player, this is desirable, because the world of NyetHack is big enough for multiple players.

But suppose you wanted a Game class to keep track of the state of the game. Having multiple instances of Game would be a problem, because they could each hold their own states, which could potentially get out of sync with each other.

If you need to hold on to a single instance with state that ...

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Publisher Resources

ISBN: 9780135165188