Calling Methods between classes?

[questionanswer]

Hi,

So I have this program that has been written and I need to call the method from the second class in the first class. I get an error about parse, but don't know any other way to do it. The problem areas are in getting length and width, thus far. It will ask for the length of the first pizza, but then will give an error. I've worked and worked on this all weekend and it's due tomorrow afternoon...ANY help would be greatly appreciated. Thank you.

package edu.uwec.cs.jimeneam.lab5;
import javax.swing.JOptionPane;
public class Lab5Start {
	public static void main (String [] args) {
		
		// --- general variables
		String inputString = "";					// input string for variables
		String outputString = "";					// output string for message dialog
		char continueChar = ' ';					// character to hold 'Y' to continue or 'N' to stop
		
		// --- variables for first pizza
		double firstLength = 0.0;					// length of first pizza if rectangular
		double firstWidth = 0.0;					// width of first pizza if rectangular
		double firstArea = 0.0;						// area of first pizza
		double firstCost = 0.0;						// cost of first pizza
		double firstCostPerArea = 0.0;				// cost per unit area of first pizza

		// --- variables for second pizza
		double secondLength = 0.0;					// length of second pizza if rectangular
		double secondWidth = 0.0;					// width of second pizza if rectangular
		double secondArea = 0.0;					// area of second pizza
		double secondCost = 0.0;					// cost of second pizza
		double secondCostPerArea = 0.0;				// cost per unit area of second pizza
		

		// initialize to go through loop first time
		continueChar = 'Y';

		// --- main processing loop
		while (continueChar != 'N') {			
			// get the length and width of the first pizza
				firstLength = inputDimension("length", 1);
				//inputString = JOptionPane.showInputDialog(null, "Enter the length of the first pizza in inches");
				firstLength = Double.parseDouble(inputString);
				firstWidth = inputDimension("width,", 1);
				//inputString = JOptionPane.showInputDialog(null, "Enter the width of the first pizza in inches");
				//firstWidth = Double.parseDouble(inputString);
			
			// get the cost of the first pizza
			inputString = JOptionPane.showInputDialog(null, "Enter the cost of the first pizza");
			firstCost = Double.parseDouble(inputString);
			
			// get the dimension(s) of the second pizza
			secondLength = inputDimension("Length", 2);
			secondLength = Double.parseDouble(inputString);
			secondWidth = inputDimension("Width", 2);
			secondWidth = Double.parseDouble(inputString);
				//inputString = JOptionPane.showInputDialog(null, "Enter the length of the second pizza in inches");
				//secondLength = Double.parseDouble(inputString);
				//inputString = JOptionPane.showInputDialog(null, "Enter the width of the second pizza in inches");
				//secondWidth = Double.parseDouble(inputString);
			
			// get the cost of second pizza
			inputString = JOptionPane.showInputDialog(null, "Enter the cost of the second pizza");
			secondCost = Double.parseDouble(inputString);

			// calculate the area of the first pizza, and format that area
			firstArea = firstLength * firstWidth;
			firstArea = ((int)(firstArea * 100)) / 100.0;
			
			// calculate the area of the second pizza, and format that area
			secondArea = secondLength * secondWidth;
			secondArea = ((int)(secondArea * 100)) / 100.0;
			
			// calculate the cost per area of the first pizza, and format that cost per area
			firstCostPerArea = firstCost / firstArea;
			firstCostPerArea = ((int)(firstCostPerArea * 10000)) / 10000.0;
			
			// calculate the cost per area of the second pizza, and format that cost per area
			secondCostPerArea = secondCost / secondArea;
			secondCostPerArea = ((int)(secondCostPerArea * 10000)) / 10000.0;
			
			// initialize the output string
			outputString = "";
			
			// append the information for the first pizza to the output string
			outputString += "\n First pizza: ";
			outputString += " Rectangle with length " + firstLength + " inches, width " + firstWidth + " inches"; 
			outputString += ", Area of " + firstArea + " sq. inches, Cost of $" + firstCost + ", Cost per square inch of $" + firstCostPerArea;
			
			// append the information for the second pizza to the output string
			outputString += "\n Second pizza: ";
			outputString += " Rectangle with length " + secondLength + " inches, width " + secondWidth + " inches"; 
			outputString += ", Area of " + secondArea + " sq. inches, Cost of $" + secondCost + ", Cost per square inch of $" + secondCostPerArea;

			// generate and append a comparison string to the output string
			if (secondCostPerArea < firstCostPerArea) {
				outputString += "\n Pizza 2 is a better value";
			}
			else if (firstCostPerArea < secondCostPerArea) {
				outputString += "\n Pizza 1 is a better value";				
			}
			else {
				outputString += "\n Pizza 1 and Pizza 2 are of equal value";
			}
			
			// output the output string to a message window
			JOptionPane.showMessageDialog(null, outputString);	

			// ask the user if they want to continue
			inputString = JOptionPane.showInputDialog(null, "Do you want to continue?  Enter Y to continue, N to quit");
			continueChar = inputString.charAt(0);
			while (continueChar != 'Y' && continueChar != 'N') {
				inputString = JOptionPane.showInputDialog(null, "Do you want to continue?  Enter Y to continue, N to quit");
				continueChar = inputString.charAt(0);			
			}
		}	// end - while loop		
	}	// end - main method
	
	// other methods go here
	
	// method to input a dimension in general
	
	public static double inputDimension(String dimensionName, int pizzaNumber) {
		// declare local variables for an input string and the dimension as a general value
		String inputString = "";
		double dimension = 0.0;

		// display an input box to get the "dimensionName" dimension for pizza "pizzaNumber"
		inputString = JOptionPane.showInputDialog(null,"Enter the " + dimensionName + " of pizza " + pizzaNumber + ":");
		
		// parse that input string into the dimension variable
		dimension = Double.parseDouble(inputString);

		// return the dimension
		return dimension;
	}
	
	// method to calculate area of pizza

	
}	// end - class Lab5

[gcalvin]

I only see one class here and no indication of what method you want to call from what other class or where or why. A clue please?

-Gary-

[questionanswer]

Sorry, I mispoke. I meant two methods within a class. The other method being:

public static double inputDimension(String dimensionName, int pizzaNumber)

That is the method I need to call under the two sets that get the dimensions for first pizza and second pizza. Sorry for the confusion in my rushed post.