Sorry, this is the first class.

 import java.util.Scanner;
public class ISPMain
{

public ISPMain()
{
    // initialise instance variables

}

/**
 *
 */
public static void main( String [] args)
{
    System.out.println("Package A: For $9.95 per month, 10 hours of access are provided. \nAdditional hours are $2.00 per hour.");
    System.out.println("Package B: For $14.95 per month, 20 hours of access are provided. \nAdditional hours are $1.00 per hour.");
    System.out.println("Package C: For $19.95 per month, unlimited access is provided.\n");

    System.out.println("Which package would you like?");
    Scanner kb = new Scanner(System.in);
    String pkg = kb.nextLine();
    char A = pkg.charAt(0);
    double hoursUsed = 0;
    if  (A == 'A' || A == 'B')
    {
        System.out.println("Number of hours of accessed used?");
        hoursUsed = kb.nextDouble();

    }

    ISP obj = new ISP(A, hoursUsed);

}

}

Here's the other class with that keeps getting the error.

public class ISP
{
 with your own
private char pkg;
private double hoursUsed;

/**
 * Constructor for objects of class ISP
 */
public ISP(char pkg, double hoursUsed)
{
    this.pkg = pkg;
    this.hoursUsed = hoursUsed;
    calculateCharges();
    printSavings();
}

public char getPkg()
{
    return pkg;
}

public double getHoursUsed()
{
    return hoursUsed;
}

public void setPkg(char pkg)
{
    this.pkg = pkg;
}

public void setHoursUsed(double hoursUsed)
{ 
    this.hoursUsed = hoursUsed;
}

public ISP()
{
    setHoursUsed(0.0);
    setPkg('A');
}

public double calculateCharges()
{
    double totalCharges = 0;
    if (pkg == 'A')
    {
        double perMonth = 9.95;
        double additionalPerHour = 2.00;
        int providedHours = 10;

        if (hoursUsed <= 10)
        {
            totalCharges = perMonth;
        }
        else if (hoursUsed > 10)
        {
            totalCharges = perMonth + (hoursUsed - 10) * additionalPerHour;
        }

    }
    else if (pkg == 'B')
    {
        double perMonth = 14.95;
        double additionalPerHour = 1.00;
        int providedHours = 20;

        if (hoursUsed <= 20)
        {
            totalCharges = perMonth;
        }
        else if (hoursUsed > 20)
        {
            totalCharges = perMonth + (hoursUsed - 20) * additionalPerHour;
        }
    }
    else if (pkg == 'C')
    {
        double perMonth = 19.95;
        totalCharges = perMonth;
    }

    System.out.println(totalCharges);
    return totalCharges;


}

public double printSavings()
{
    double ABSavings = 0;
    if (pkg == 'A')
    {
        ISP packageA = new ISP('A',hoursUsed);
        ISP packageB = new ISP('B',hoursUsed);
        double pkgASave = packageA.calculateCharges();
        double pkgBSave = packageB.calculateCharges();

        if (pkgBSave < pkgASave )
        {
            ABSavings = (pkgASave - pkgBSave);
            System.out.println("You would have saved " + ABSavings + "by choosing package B" );
        }


    }

    return ABSavings;

}

}