import javax.swing.JOptionPane;

class MathStudent2 extends Student{
	private final double MATH_MIDTERM_PERCENTAGE = .50;
	private final double MATH_FINALEXAM_PERCENTAGE = .50;	
	
	public MathStudent2()
	{
		System.out.println("MathStudent's constructor");	
	}
		
	public void setMidterm(int temp)
	{
		if(temp<0 | temp>100)
		{
			JOptionPane.showMessageDialog(null,"Invalid Midterm Grade("+temp+")"+"Program Terminating");
			System.exit(0);
		}
		else
			midterm = temp;
	}
	
	public int getMidterm()
	{
		return midterm;	
	}
	
	public void setFinalExam(int temp)
	{
			if(temp < 0 | temp > 100)
			{
					JOptionPane.showMessageDialog(null,"Invalid finalExam Grade("+temp+")"+"Program Terminating");
			System.exit(0);
		  }
		  else
			finalExam = temp;
			
	}
	
	public int getFinalExam()
	{
		return finalExam;	
	}
	
	public void setResearch(int temp)
	{
			if(temp < 0 | temp > 100)
			{
					JOptionPane.showMessageDialog(null,"Invalid finalExam Grade("+temp+")"+"Program Terminating");
			System.exit(0);
		  }
		  else
			research = temp;
			
	}
	
	public int getResearch()
	{
		return research;	
	}
	
	public void setPresentation(int temp)
	{
			if(temp < 0 | temp > 100)
			{
					JOptionPane.showMessageDialog(null,"Invalid finalExam Grade("+temp+")"+"Program Terminating");
			System.exit(0);
		  }
		  else
			presentation = temp;
			
	}
	
	public int getPresentation()
	{
		return presentation;	
	}
	
	public double getFinalNumericGrade()
	{
		return finalNumericGrade;	
	}
	
	public String getFinalLetterGrade()
	{
		return finalLetterGrade;	
	}
	public void calculate()
	{
		midterm = Integer.parseInt(JOptionPane.showInputDialog("Enter the midterm grade:"));										
		finalExam = Integer.parseInt(JOptionPane.showInputDialog("Enter the final exam grade:"));
								
		finalNumericGrade = (midterm*MATH_MIDTERM_PERCENTAGE)+(finalExam*MATH_FINALEXAM_PERCENTAGE);
								
		if(finalNumericGrade > 90)
			finalLetterGrade = "A";
		else if((finalNumericGrade >= 83)&(finalNumericGrade < 90))
			finalLetterGrade = "B";
		else if((finalNumericGrade >= 76)&(finalNumericGrade < 83))
		  finalLetterGrade = "C";
		else if((finalNumericGrade >= 65)&(finalNumericGrade < 76))
			finalLetterGrade = "D";
		else 
			finalLetterGrade = "F";	
	}
}