CSC-220 City Distance Data Class that read info from URL

CityDistanceData4.java

package Chapter8ArrayExamples;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Scanner;

public class CityDistanceData4 {

	private static String cities[];
	private static double distMatrix[][];
	
	static {
		try {
			initDistanceMatrix("https://cs.stcc.edu/~silvestri/CityDistanceData/DistanceData2.txt");
		}
		catch (Exception ex) {
			System.out.println(ex);
		}
	}

	private static int cityToIndex(String city) {
		for (int i = 0; i < cities.length; i++)
			if (cities[i].equals(city))
				return i;
		return -1;
	}

	private static void initDistanceMatrix(String strURL) throws MalformedURLException, IOException  {
		Scanner input = new Scanner(new URL(strURL).openStream());
		int size = input.nextInt();
		input.nextLine();

		cities = new String[size];
		for (int i = 0; i < cities.length; i++) {
			cities[i] = input.nextLine();
		}
		
		distMatrix = new double[size - 1][];
		for (int row = 0; row < distMatrix.length; row++) {
			distMatrix[row] = new double[row + 1];
		}
		
		for (int row = 0; row < distMatrix.length; row++) {
			for (int col = 0; col < distMatrix[row].length; col++) {
				distMatrix[row][col] = input.nextInt();
			}
		}
		input.close();		
	}

	public static double distance(String start, String dest) {
		int row = cityToIndex(start);
		if (row == -1) {
			System.err.println("Illegal Start City: " + start);
			return -1;
		}
		int col = cityToIndex(dest);
		if (col == -1) {
			System.err.println("Illegal Destination City: " + dest);
			return -1;
		}
		if (row == col)
			return 0;
		if (row > col)
			return distMatrix[row - 1][col];
		return distMatrix[col - 1][row];
	}

}