Turtlegraphics with Java

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Installatiom

We assume that JavaSDK and a Java development environment (NetBeans, Eclipse, BlueJ etc.) are installed on your computer.

In order to use the Turtle library, you must save it on your computer and integrate it into your Java development environment.

• Download the file aplu5.jar*: download aplu5.jar
  
• Save the file on your computer (e.g. under C:\jars)
• Create a java project in your development environment
• Add aplu5.jar under Libraries/Add JAR. (usually by right-clicking on Libraries and specifying the jar location)
• The graphics libraries gturtle and gpanel are packaged in aplu5.jar. If you have already worked with Turtle graphics, you no longer need to download aplu5.jar.
• Test the installation. Create a new class under <default packages>, e.g. Tu1, and insert the small test programme.

import ch.aplu.turtle.*;

public class  Tu1
{
  Turtle joe = new Turtle();

  public Tu1()
  {
    joe.forward(50);
    joe.right(90);
    joe.forward(50);    
  }

  public static void main(String[] args)
  {
    new Tu1();
  }
}

• Right-click on Tu1.java and select Run File. If no error messages appear and the graphic is displayed, you can start programming.

*The name aplu5.jar comes from the developer of the class library Turtle Prof. Dr. Aegidius Plüss.