APCS: AP Computer Science A @sfhs

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====== Installing an External Library in BlueJ with an external .jar file ======
  - Make a New Project in BlueJ
  - Select ''Preferences'' (In MacOS it is under the 'BlueJ' menu,in Windows it is under 'Tools' ){{::tools.png?300|}} 
  - Click the ''Libraries'' Tab
  - Press the ''Add File'' button {{::librry.png}}
  - Select the ''kareljrobot.jar'' file or other .jar file you downloaded, press the ''Open'' button
  - It will tell you to restart the Virtual Machine, press the ''Okay'' button
  - Under the ''Tools'' menu select ''Reset Java Virtual Machine'' (or press **Ctrl-Shift-R**){{::reset.png?400|}}  Sometimes it is best to simply Quit and relaunch BlueJ.
  - To test the APLU Turtle Library {{ ::jturtle-0.1.1.jar |jturtle-0.1.1.jar}}, try this  example program:<code java>
import ch.aplu.turtle.*;
import java.awt.Color;
/**
 * 
 * @author (Your Name)
 * @version September 0, 2024
 */
public class MyPicture {
	
	public static void main(String[] args) {		
	    
        Turtle hexter = new Turtle(Color.GREEN);
        hexter.setPos(100,-50);
       
        
        for (int i=0; i< 6; i++) {
        	hexter.forward(100);
        	hexter.right(-60);
        }
        hexter.setPos(0,0);
        hexter.setFillColor(Color.BLUE);
	    hexter.fill();
	    
        Turtle t = new Turtle(hexter); 
        t.setColor(Color.RED);
		t.setPos(-200, 180);
	    t.hideTurtle().label( "by My name"); 	
	    
	}

}
</code>
  - To test our the ''kareljrobot.jar''installation, make a new class ''RobotRunner'' to test it out:<code java>
  import kareltherobot.*;
  public class RobotRunner implements Directions
  {
	public static void main(String[] args) 
	{
		World.setDelay(150);
		World.placeBeepers(4, 3, 2);
		World.setVisible();
	}
  }
</code>