Then skim through the Color Javadoc to become familiar with that class. In particular, you will need to use the following methods: getWidth, getHeight, getColorAt, and setColorAt.Īdd the line import to the top of your source file. Skim through the GreenfootImage Javadoc to become familiar with that class. Each object represents the red, green, and blue value of a single pixel. Images in Greenfoot are essentially 2D arrays of Color objects. After you complete the exercises below, you will submit the Image.java file via Canvas. Write your name, today's date, and a short description of this lab in the Javadoc comment of the Image class. Then press 'Compile' in the main Greenfoot window. Open the editor for Image.java (by double clicking on the Image rectangle on the right) and modify the constructor to use the dimensions 640x426 (the actual size of football.jpg). Then in Greenfoot, right-click the 'World' rectangle on the right and select 'New subclass.' Name the subclass Image and select football.jpg (it should be listed below). Right-click the football stadium photo above, and save it to the 'images' folder in your Greenfoot project. (When you start the program, it opens whatever project you were working on previously.) You may want to close any Greenfoot windows from last time. Name your scenario Lab22 or whatever you like.

Run Greenfoot and then select 'Scenario > New.' from the menu. In the previous Greenfoot lab, we dealt with Actor objects. In today's lab, you will use Greenfoot to implement several features of programs like Photoshop. Media Computation is an approach to learning programming that focuses on manipulating digital media like images and sounds. Image courtesy of JMU Creative Services Background

Greenfoot sounds