Basically, at my University, we’ve been given a Finch Robot to work with and help us develop our Java programming skills. However, I have a slight problem. The Uni uses Windows machines and I use a Mac, and basically we’ve been given pre-written code to test out our Finch Robot. When I copy and paste the code in the WIndows machine, Eclipse gives me no errors whatsoever, and I can go ahead and test the Robot out, but when I attempt the same thing on the Mac, I get 30 errors!! I have no idea what I’m doing wrong.
Here is the code (I’ve pasted the errors below the code):
import java.util.Random;
import javax.swing.JOptionPane;
import edu.cmu.ri.createlab.terk.robot.finch.Finch;
public class DoesMyFinchWork
{
//This value is the time for most of the tests in milliseconds, 1000 = 1 second
//Change this value if the tests are too long or short
final private static int testtime = 5000;
//This is the Finch object
private static Finch myf = null;
//This is the starting point of the testing program
public static void main(String args[])
{
String s = "";
//'myf' is the name of our Finch object
//This will used throughout the program to control your Finch and report it's status
myf = new Finch();
do
{
//Run the menu until quit or cancel is selected
s = FinchMenu();
if (s == "Light Test") RunLightTest(s);
if (s == "Tilt Test") RunTiltTest(s);
if (s == "Tap Test") RunTapTest(s);
if (s == "Temperature Test") RunTemperatureTest(s);
if (s == "Obstacle Test") RunObstacleTest(s);
if (s == "Acceleration Test") RunAccelerationTest(s);
if (s == "Left Wheel Test") RunLeftWheelTest(s);
if (s == "Right Wheel Test") RunRightWheelTest(s);
if (s == "Buzzer Test") RunBuzzerTest(s);
if (s == "Nose Test") RunNoseTest(s);
} while (s != "Quit");
System.out.println("Exiting DoesMyFinchWork...");
myf.quit();
}
//This creates the Finch menu
private static String FinchMenu()
{
Object[] possibilities = {"Light Test", "Tilt Test","Tap Test","Temperature Test", "Obstacle Test","Acceleration Test","Left Wheel Test","Right Wheel Test","Buzzer Test","Nose Test","Quit"};
String s = (String)JOptionPane.showInputDialog(null,"Dr Swift's Splendid Finch Test\n++++++++++++++++++++++++\nChoose a test from:\n\n","Week Zero Laboratory",JOptionPane.PLAIN_MESSAGE, null,possibilities,"Light Test");
if (s == null || s.length() == 0) s = "Quit";
return(s);
}
//Run the light sensor test
//Displays the left and then the right sensor output
private static void RunLightTest(String s)
{
System.out.println("\n"+"Running: "+s+"\n");
long before = System.currentTimeMillis();
while(System.currentTimeMillis() - before < testtime)
{
System.out.println(myf.getLeftLightSensor() + " " + myf.getRightLightSensor());
}
}
//Run the Tilt Test
//Displays:
//1) Is the beak down?
//2) Is the beak up?
//3) Is the Finch level?
//4) Is the Finch upside down?
//5) Is the Finch's left wing down?
//6) Is the Finch's right wing down?
private static void RunTiltTest(String s)
{
System.out.println("\n"+"Running: "+s+"\n");
long before = System.currentTimeMillis();
while(System.currentTimeMillis() - before < testtime)
{
System.out.println(myf.isBeakDown() + " " + myf.isBeakUp() + " " + myf.isFinchLevel() + " " + myf.isFinchUpsideDown() + " " + myf.isLeftWingDown() + " " + myf.isRightWingDown());
}
}
//Run the tap test
//Displays if the Finch has been tapped
private static void RunTapTest(String s)
{
System.out.println("\n"+"Running: "+s+"\n");
long before = System.currentTimeMillis();
while(System.currentTimeMillis() - before < testtime)
{
System.out.println(myf.isTapped());
}
}
//Run the temperature test
//Displays the current temperature in degrees Celsius
private static void RunTemperatureTest(String s)
{
System.out.println("\n"+"Running: "+s+"\n");
long before = System.currentTimeMillis();
while(System.currentTimeMillis() - before < testtime)
{
System.out.println(myf.getTemperature());
}
}
//Run the obstacle sensor test
//Displays if there is an obstacle left and right of the Finch
private static void RunObstacleTest(String s)
{
System.out.println("\n"+"Running: "+s+"\n");
long before = System.currentTimeMillis();
while(System.currentTimeMillis() - before < testtime)
{
System.out.println(myf.isObstacleLeftSide() + " " + myf.isObstacleRightSide());
}
}
//Run the acceleration sensor test
//Displays is the Finch is being shaken, and then the acceleration in the X, Y and Z planes
private static void RunAccelerationTest(String s)
{
System.out.println("\n"+"Running: "+s+"\n");
long before = System.currentTimeMillis();
while(System.currentTimeMillis() - before < testtime)
{
System.out.println(myf.isShaken()+ " " + myf.getXAcceleration() + " " + myf.getYAcceleration()+ " " + myf.getZAcceleration());
}
}
//Run the left wheel test
//Move the left wheel forward and backwards
private static void RunLeftWheelTest(String s)
{
System.out.println("\n"+"Running: "+s+"\n");
myf.setWheelVelocities(255,0,testtime/2);
myf.setWheelVelocities(-255,0,testtime/2);
}
//Run the right wheel test
//Move the right wheel forward and backwards
private static void RunRightWheelTest(String s)
{
System.out.println("\n"+"Running: "+s+"\n");
myf.setWheelVelocities(0,255,testtime/2);
myf.setWheelVelocities(0,-255,testtime/2);
}
//Sound the buzzer for a number of different frequencies
private static void RunBuzzerTest(String s)
{
System.out.println("\n"+"Running: "+s+"\n");
for(int i=0;i<=5000;i+=10)
{
myf.buzz(i,10);
long before = System.currentTimeMillis();
while(System.currentTimeMillis() - before < 10)
{
//Do nothing...
}
}
}
//Flash the Finch's nose red, green and blue
//Then flash it randomly
private static void RunNoseTest(String s)
{
System.out.println("\n"+"Running: "+s+"\n");
for(int r=0;r<=255;r+=5)
{
myf.setLED(r,0,0,10);
}
for(int g=0;g<=255;g+=5)
{
myf.setLED(0,g,0,10);
}
for(int b=0;b<=255;b+=5)
{
myf.setLED(0,0,b,10);
}
Random rand = new Random();
rand.setSeed(System.currentTimeMillis());
for(int i=0;i<50;++i)
{
int r = Math.abs(rand.nextInt() % 255);
int g = Math.abs(rand.nextInt() % 255);
int b = Math.abs(rand.nextInt() % 255);
myf.setLED(r,g,b,5);
}
}
}
Here are some of the errors (All 30 errors say ‘Finch cannot be resolved to a type’):
Description Resource Path Location Type
Finch cannot be resolved to a type DoesMyFinchWork.java /DoesMyFinchWork/src line 169 Java
Problem
Finch cannot be resolved to a type DoesMyFinchWork.java /DoesMyFinchWork/src line 165 Java
Problem
Finch cannot be resolved to a type DoesMyFinchWork.java /DoesMyFinchWork/src line 161 Java
Problem
Finch cannot be resolved to a type DoesMyFinchWork.java /DoesMyFinchWork/src line 146 Java
Thanks a-lot for your help!
In eclipse just find the jar of Finch, the copy-paste it in a folder of your project (hopefully you have a lib folder), the right-click on that file Build Path > Add to Build Path
and that should solve the problem.