hu - Java Games Design Patterns: Learning Programming design patterns through games

Java Games Design Patterns: Learning Programming design patterns through games — read online for free the complete book (whole text) full work

Below is the text of the book, divided by pages. System saving the place of the last page read, allows you to conveniently read the book "Java Games Design Patterns: Learning Programming design patterns through games" online for free, without having to search again every time where you left off. Put a bookmark, and you can go to the page where you finished reading at any time.

Light

Font size:

↓

↑

Georgia Tahoma Arial Verdana

Reset

Interval:

↓

↑

Bookmark:

Make

1234567...22

Java Games Design Patterns

YANG HU

Simple is the beginning of wisdom. This book briefly explain the concept and real practice examples in games, you will learn easy and fun.

http://en.verejava.com

Copyright 2020 Yang Hu

All rights reserved.

ISBN : 979864812538 4

CONTENTS

If you want to learn this book, you must have basic knowledge of Java,

you can learn our course << Easy Learning Java (3 Editon)>>

http://en.verejava.com

If you already have basic knowledge of Java skip it, start an exciting journey

Download GameDesignPatternImages.zip all images for this book.

http://en.verejava.com/download.jsp?id=1

Template Pattern Principle

Template Pattern : Defer the exact steps of an algorithm to a subclass. Define the skeleton of an algorithm in an operation, deferring some steps to subclasses. Template Method lets subclasses redefine certain steps of an algorithm without changing the algorithms structure.

BluePlane inherit from Sprite Template for reuse.

Sprite:

1. x: x coordinate of Canvas 2. y: y coordinate of Canvas 3. Sprite(String name, int x, int y): constructor method 4. draw(): draw sprite on canvas 5. move( int distanceX, int distanceY): sprite move on canvas

Sprite.java in package com.template.principle;

class Sprite { protected int x ; // x coordinate of Canvas protected int y ; // y coordinate of Canvas protected String name ; public Sprite(String name, int x, int y) { this . name = name; this . x = x; this . y = y; } public void draw() { String text = this . name + " draw on (" + this . x + " , " + this . y + ")" ; System. out .println(text); } // distanceX: distance moved in the x-axis // distanceX: distance moved in the y-axis public void move( int distanceX, int distanceY) { String text = this . name + " move distance (" +distanceX+ " , " + distanceY+ ")" ; System. out .println(text); } }

BluePlane.java in package com.template.principle;

public class BluePlane extends Sprite{ public BluePlane(String name, int x, int y) { super (name, x, y); } }

. Create a Test class : TestTemplate.java in package com.template.principle;

public class TestTemplate { public static void main(String[] args) { BluePlane bluePlane = new BluePlane( "BluePlane" , 50,150); bluePlane.draw(); bluePlane.move(5, 5); } }

Result:

BluePlane draw on (50 , 150)

BluePlane move distance (5 , 5)

Template Pattern Game

BluePlane draw on canvas, Press the keyboard to move up, down, left, right.

2. UML Diagram BluePlane inherit from Sprite Template for reuse.

Sprite:

1. x: x coordinate of Canvas 2. y: y coordinate of Canvas 3. BufferedImage image : the image of BluePlane ( blue_plane.png ) 4. Sprite( int x, int y, BufferedImage image): constructor method 5. draw(Graphics g): draw sprite on canvas 6. move( int distanceX, int distanceY): sprite move on canvas

Sprite.java in package com.template.game;

import java.awt.Graphics; import java.awt.image.BufferedImage; class Sprite { protected int x ; // x coordinate of Canvas protected int y ; // y coordinate of Canvas protected BufferedImage image ; public Sprite( int x, int y, BufferedImage image){ this . x = x; this . y = y; this . image = image; } public void draw(Graphics g){ g.drawImage( image , this . x , this . y , null ); } public void move( int distanceX, int distanceY){ this . x = this . x + distanceX; this . y = this . y + distanceY; } }

BluePlane.java in package com.template.game;

import java.awt.image.BufferedImage; public class BluePlane extends Sprite{ public BluePlane( int x, int y, BufferedImage image) { super (x, y, image); } }

Canvas:

1. loadImage(String imagePath): load image ( blue_plane.png ) to BufferedImage 2. paintComponent(Graphics g): can draw image and also be called explicitly by the repaint() method defined in Component class. The effect of calling repaint() is that Swing automatically clears the graphic on the panel and executes the paintComponent method to redraw the graphics on this panel. this .addKeyListener( new KeyAdapter(): Monitoring and receiving keyboard events to move up, down, left, right.

Canvas.java in package com.template.game;

import java.awt.*; import java.awt.event.*; import java.awt.image.BufferedImage; import java.io.*; import javax.imageio.ImageIO; import javax.swing.*; public class Canvas extends JPanel { private BufferedImage blueImage ; private Sprite bluePlane ; public Canvas() { this .setLayout( null ); this .setBackground(Color. WHITE ); blueImage =loadImage( "images/blue_plane.png" ); bluePlane = new BluePlane(120, 250, blueImage ); this .addKeyListener( new KeyAdapter() { public void keyPressed(KeyEvent e) { int keyCode = e.getKeyCode(); if (keyCode == KeyEvent. VK_UP ){ bluePlane .move(0, -6); } else if (keyCode == KeyEvent. VK_DOWN ){ bluePlane .move(0, 6); } else if (keyCode == KeyEvent. VK_RIGHT ){ bluePlane .move(6, 0); } else if (keyCode == KeyEvent. VK_LEFT ){ bluePlane .move(-6, 0); } Canvas. this .repaint(); } }); } protected void paintComponent(Graphics g) { super .paintComponent(g); bluePlane .draw(g); } public BufferedImage loadImage(String imagePath) { File file = new File(imagePath); BufferedImage bufferedImage = null ; try { bufferedImage = ImageIO. read (file); } catch (IOException e) {

Next page

1234567...22

Light

Font size:

↓

↑

Georgia Tahoma Arial Verdana

Reset

Interval:

↓

↑

Bookmark:

Make

Similar books «Java Games Design Patterns: Learning Programming design patterns through games»

Look at similar books to Java Games Design Patterns: Learning Programming design patterns through games. We have selected literature similar in name and meaning in the hope of providing readers with more options to find new, interesting, not yet read works.

John Horton

Learning Java by Building Android Games: Learn Java and Android from scratch by building five exciting games, 3rd Edition

Sarcar

Java design patterns A hands-On experience with real-world examples

Sanders

Learning PHP Design Patterns

Soshin

Hands-on design patterns with Kotlin build scalable applications using traditional, reactive, and concurrent design patterns in Kotlin

Purificação João

Java EE 8 design patterns and best practices: build enterprise-ready scalable applications with architectural design patterns

Annette Godtland

Advanced Do-It-Yourself Java Games: An Introduction to Java Threads and Animated Video Games

Murat Yener

Professional Java Ee Design Patterns

Sadaphule

Creational Design Patterns in Java

Sarcar V.

Java Design Patterns: A Tour with 23 Gang of Four Design Patterns in Java

Annette Godtland

Do-It-Yourself Java Games: An Introduction to Java Computer Programming

Gennadiy Zlobin

Learning Python Design Patterns

William Sanders

Learning PHP Design Patterns

Discussion, reviews of the book Java Games Design Patterns: Learning Programming design patterns through games and just readers' own opinions. Leave your comments, write what you think about the work, its meaning or the main characters. Specify what exactly you liked and what you didn't like, and why you think so.