Note: If you want to use a name other than WorldSetup.txt, adjust the constant WORLD_SETUP_FILE in the KaraWorld class.Ī world setup file may contain multiple worlds. To create your own scenarios I recommend you copy an existing scenario and make changes to the WorldSetup.txt file. When the Run-button is pressed, the act()-method is called repeatedly. This method is executed when the Act-button is pressed. The programming can be done inside the act()-method of MyKara. This way one can get accustomed with how Kara works. If you right-click on a Kara-object, all available methods are shown and can be selected with the mouse. On first contact with GreenfootKara it is helpful to only use the mouse. (Tip: by pressing the shift-key you can place multiple instances in the world without using the context menu). Objects of classes can be instantiated through a right-click, new ….() and can then be placed in the world. This only shows the Javadoc comments inside the Greenfoot editor. For this step it is recommended that they first view the class in the documentation mode. Later, the students may choose to find out how the methods were implemented in Kara itself. Thus, the complexity of Kara's methods are hidden from the students at first. But programming is always done in the class MyKara which, through inheritance, can accessed all the methods of Kara. The class Kara includes all the functionality of the ladybug Kara as seen above. The most important classes are Kara and MyKara. In Chapter 5, Kara has a few additional methods to show messages and to ask the user for input. In Chapter 4, Kara has a additional methods so that a Sokoban game can be programmed.
The possibilities of Kara remain the same for all exercises, except for chapter 4 and 5. In each scenario, the world of Kara (with trees, leafs, etc.), is already prepared for each exercise. Run the setup program and follow the installation instructions.Īfter installation, any Kara-Scenario may be opened using the eenfoot file in the scenario folder.įor each exercise there is a separate scenario (see folder scenarios-chapter-1, scenarios-schapter-1-solutions, etc.). To use the Kara-Scenario Greenfoot must be installed first. Option 3: Start GUI-programming with JavaFX.
Greenfoot source code professional#
Option 2: Start using a professional development environment like Eclipse, Netbeans, etc.Option 1: Develop a custom project with Greenfoot.3 lessons: Writing own methods with parameters and return values, repetition (chapter 5).3-4 lessons: Programming a game, keyboard input, comparing Strings, reading Javadoc, designing ASCII levels, publishing the program on the Greenfoot website (chapter 4).3-4 lessons: Variables, data types and operators, the structure of a class, nested statements (chapter 3).3-4 lessons: flow diagram, control structures (conditions and loops), boolean and logic operators (chapter 2).3 lessons: Getting to know Kara, creating objects and calling methods with the mouse, reading source code, writing the first program (chapter 1).1 lesson: Installing Greenfoot, starting Greenfoot projects.When used in schools, the entire GreenfootKara material will take about 16-20 lessons. This might be especially helpful if you are a teacher.
Greenfoot source code how to#
In this article you will find background information on how to work with GreenfootKara.
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