CSC-111 Just some random array exercises

RandomArrayMethods.java

 * Name: A.C. Silvestri
 * Date: 11/15/2019
 * Course Number CSC-111
 * Course Name: Intro to Java
 * Problem Number: NA
 * Email: silvestri@stcc.edu
 * Description: Just some random array exercises
 */

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

public class RandomArrayMethods {
	private final static String TITLE = "Random Array Methods";
	private final static String CONTINUE_PROMPT = "Do this again? [y/N] ";
	
	//**********************************************
	// Put as many methods you need here

	private static void printData(double[] x) {
		for (int i = 0; i < x.length; i++) {
			System.out.printf("%8.2f", x[i]);
			if ((i+1) % 10 == 0) {
				System.out.println();
			}
		}
		System.out.println();
	}	
	
	private static double findMaximumValue(double[] data) {  
		double max = data[0];
		for (int i = 1; i < data.length; i++) {
			if (data[i] > max)
				max = data[i];
		}
		return max;
	}
	
	private static double findMinimumValue(double[] data) {  
		double min = data[0];
		for (int i = 1; i < data.length; i++) {
			if (data[i] < min)
				min = data[i];
		}
		return min;
	}
	
	private static double[] findMinMaxValue(double[] data) {  
		double min = data[0];
		double max = data[0];
		for (int i = 1; i < data.length; i++) {
			if (data[i] < min)
				min = data[i];
			else if (data[i] > max)
				max = data[i];
		}
		return new double[] {min, max};
	}

	private static double[] generateArray(int size) {
		double x[] = new double[size];
		for (int i = 0; i < x.length; i++) {
			x[i] = 1000 * Math.random();
		}
		return x;
	}
	
	// First number in file indicates the number of numbers that follow

	private static double[] readDataFileFromWebServer(String filename) throws IOException  {
		URL url = new URL("https://cs.stcc.edu/~silvestri/csc111/" + filename);
		
		Scanner fileInput = new Scanner(url.openStream());
		int size = fileInput.nextInt();
		double x[] = new double[size];
		for (int i = 0; i < x.length; i++)
			x[i] = fileInput.nextDouble();	
		fileInput.close();
		return x;
	}	
	
	private static double[] readDataFileFromLocalFileSystem(String filename) throws IOException {
		File file = new File(filename);
		
		Scanner fileInput = new Scanner(file);
		int size = fileInput.nextInt();
		double x[] = new double[size];
		for (int i = 0; i < x.length; i++)
			x[i] = fileInput.nextDouble();	
		fileInput.close();
		return x;
	}	
	
	//**********************************************
	// Start your logic coding in the process method
	private static void process(Scanner input, String args[]) throws IOException {
		System.out.println("Enter filename: ");
		String filename = input.nextLine();
		double data[] = readDataFileFromWebServer(filename);
		//double data[] = readDataFileFromLocalFileSystem(filename);
		
		printData(data);
		
		System.out.print("Maximum Value: ");
		double max = findMaximumValue(data);
		System.out.println(max);
		
		System.out.print("Minimum Value: ");
		double min = findMinimumValue(data);
		System.out.println(min);
		
		System.out.print("Min and Max Values: ");
		double minmax[] = findMinMaxValue(data);
		System.out.println(minmax[0] + " " + minmax[1]);

		//sc.nextLine();
	}


	//**********************************************
	// Do not change the doThisAgain method
	private static boolean doThisAgain(Scanner sc, String prompt) {
		System.out.print(prompt); 
		String doOver = sc.nextLine();
		return doOver.trim().equalsIgnoreCase("Y");
	}
	
	//**********************************************
	// Do not change the main method
	public static void main(String args[]) throws IOException {
		System.out.println("Welcome to " + TITLE);
		Scanner sc = new Scanner(System.in);
		do {
			process(sc, args);
		} while (doThisAgain(sc, CONTINUE_PROMPT));
		sc.close();
		System.out.println("Thank you for using " + TITLE);
	}

}