Confusion about how to process lines in a text file as they are read

So I was given the following GradedActivity class:

 public class GradedActivity   
{   
private double score;  // Numeric score   
public void setScore(double s)
{
if (s < 0)
score = 0.0;
else if (s > 100)
score = 100.0;
else
score = s;
}
public double getScore()
{
return score;
}
public char getGrade()
{   
char letterGrade;  
if (score >= 90)
letterGrade = 'A';
else if (score >= 80)
letterGrade = 'B';
else if (score >= 70)
letterGrade = 'C';
else if (score >= 60)
letterGrade = 'D';
else
letterGrade = 'F';
return letterGrade;
} } 

and I was tasked with generating a constructor that accepts values for points Obtaned and pointsTotal as arguments, initializes them, and sets the corresponding score (points obtained divided by points total), accessors and mutators for pointsobtained and total.

So here is what I came up with:

public class ProgrammingAssignment extends GradedActivity 
{
public int pointsObtained;
public int pointsTotal;
public ProgrammingAssignment(int p, int t)
{
pointsObtained = p;
pointsTotal = t;
} 
public int getPointsObtained()
{
return pointsObtained;
}
public int getPointsTotal()
{
return pointsTotal;
}
public double getScore()
{
return pointsObtained / pointsTotal;
}
public void setPointsObtained(int p)
{
pointsObtained = p;
}
public void setPointsTotal(int t)
{
pointsTotal = t;
}     
}  

Everything compiles without error, but getScore isn't computing obtained/total (it comes back 0) in my test class:

 public class PADemo
{
public static void main(String[] args)
{
ProgrammingAssignment p1 = new ProgrammingAssignment(28,30);
GradedActivity p2 = new ProgrammingAssignment(0,30);
System.out.println (p1.getPointsObtained());
System.out.println (p1.getPointsTotal());
System.out.println (p1.getScore());  
System.out.println (p1.getGrade());  
System.out.println (p2.getScore());  
System.out.println (p2.getGrade());  
p1.setPointsObtained(25);
p1.setPointsTotal(40);
System.out.println (p1.getScore());  
System.out.println (p1.getGrade() == 'F');  
}
}  

How do I obtain the score (points obtained/points total) with getScore()

Test class returns:

28
30
0.0
F
0.0
F
0.0
true

> Cars waiting: [a A123TR, a Z23YTU, a R23EWQ, a ERW345, a B12GFT...

Does that look correct? Why would you have the "a " at the beginning? That is not part of the car license. The "a " and "d " need to be removed BEFORE you add the license to the garage or queue.

> creates a stack for cars in a garage (Max of 7)

> a queue for cars waiting (max of 5)

Your basic logic appears wrong (to me).

When you get an "a" you do one of two things:

1. if there are less than 7 cars in the garage you add the car to the garage.
2. If there are 7, then if then are less the 5 cars in the queue, you add the car to the "queue".

When you get a "d" you:

1. first remove the car from the "garagee",
2. then you check the "queue". If there are cars in the "queue" then you move the car from the "queue" to the "garage".

So the logic might be structure something like:

while (...)
{
...
String[] data = line.split(" ");
if (data[0].equals("a"))
processArrival( data[1] );
else if (data[0].equals("d"))
processDeparture( data[1] );
}

1. I used the String.split(...) method which was suggested in your last question because it is a better test then to test the whole String for a specific character and your two pieces of data are separated into the array ready for processing. The data will now be split into two pieces of data: a) function
   b) license

2. I used separate methods because the code is easier to read and logic for each function is contained in individual methods.