The following tutorial will teach you how to create a game using Greenfoot IDE (Integrated Development Environment).
Now you will see your new scenario, which includes two classes and a subclass by default:
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Each class we are going to create will be a subclass of the above classes and will inherit from them.
Now we are going to create a subclass of the Actor, which will inherit all the methods from the Actor Class.
Remember that all classes should start with capital letters.
We created the subclass “Bee” and now we will add an instance of this subclass to make it visible on the background.
Another possible option to add the moves of the bee is to add these blocks of code outside the Act Method, that is creating those methods separately and calling them in the Act Method (see demo game).
or, as we did before for the Bee,
Now we have one Bee moving and 6 Flowers. We will make the flowers disappear when the Bee eats them.
Now will add a visible score section on the top left side of the background to show the user how many flowers have been eaten progressively.
showText is a method included in the World, so the class Actor doesn’t include it by default. If we want to add the code for the score inside the “Bee” section, first of all we have to call the method from the World ( MyWorld mw = (MyWorld)getWorld();).
Then we can use the method to add the string and the position of the score label.
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Greenfoot is a combination integrated development environment and framework for doing 2-dimensional graphics. It greatly simplifies doing graphics in Java, while simultaneously demonstrating objects and classes.
The Greenfoot package relies on the GreenFinch class, written by Michael Berry, a member of the Greenfoot team at the University of Kent. The API of this class is documented on our site.
The GreenFinch class is backed by the full Finch java package, and it is possible to use all of the capabilities of this package (including reading RSS feeds, and manipulating computer audio). Therefore, we also suggest you look through the regular Finch javadocs.
1. Find greenfoot.defs (probably in /usr/share/greenfoot) and change the following line from:
bluej.vm.args=-Xincgc -Dapple.awt.graphics.UseQuartz=true -Djava.library.path=.
2. Launch Greenfoot with sudo.
1. Download one of Greenfoot’s Finch packages and unzip it to a convenient directory.
2. Double click on the project.greenfoot file to open it in Greenfoot.
3. Note that you will need Greenfoot v2.01 or higher for the Finch to work.
1. Hit the Run button, ensure your Finch is plugged in.
1. Right-click on one of the actor classes to create a new object that will act in the world. Select “New subclass…” and give the subclass an image and name.
The Finch Greenfoot package has the following folders:
Readme – Read this first!
finchstarter – A starter world set up to work with Finch.
finchdemo – A Greenfoot-built control panel that visualizes Finch sensor data and allows you to set all of the Finch’s outputs.
finchlight – A simple program demonstrating interaction of the motors, light sensors, and a graphical slider.
GreenFinchDoc – The documentation for the GreenFinch class.
javadocs – The documentation of the full Finch java package.
licenses – Licensing details.
Version 1.1 compatibility fixes with Greenfoot’s Color library.
Version 1.0 is now available and has been successfully tested on Windows XP 32-bit, Windows 7 64-bit, Mac OS 10.6, and Ubuntu 10.04 with Greenfoot 2.0.1.