"26.6. Examples 1 a = Double.parseDouble(args[0]); 2 b = Double.parseDouble(args[1]); 3 c = Double.parseDouble(args[2]); Finally, think about the possible inputs a user could provide that may cause problems for this program. For example: • What if the user entered zero for a ? • What if the user entered some combination such that b 2 < 4 ac ? • What if the user entered non-numeric values? • For the command line argument version, what if the user provided less than three arguments? Or more? How might we prevent the consequences of such bad input? How might we handle the event that a user enters bad input and how do we communicate these errors to the user? To start to resolve these issues, we’ll need conditionals. 401\n\n26. Basics 1 package unl.cse; 2 3 import java.util.Scanner; 4 5 /** 6 * This program computes the roots to a quadratic equation 7 * using the quadratic formula. 8 */ 9 public class QuadraticRoots { 10 11 public static void main(String args[]) { 12 13 double a, b, c, root1, root2; 14 Scanner s = new Scanner(System.in); 15 16 System.out.println(\"Please enter a: \"); 17 a = s.nextDouble(); 18 System.out.println(\"Please enter b: \"); 19 b = s.nextDouble(); 20 System.out.println(\"Please enter c: \"); 21 c = s.nextDouble(); 22 23 root1 = (-b + Math.sqrt(b*b - 4*a*c) ) / (2*a); 24 root2 = (-b - Math.sqrt(b*b - 4*a*c) ) / (2*a); 25 26 System.out.printf(\"The roots of %fx^2 + %fx + %f are:\n\n\", 27 a, b, c); 28 System.out.printf(\" root1 = %f\n\n\", root1); 29 System.out.printf(\" root2 = %f\n\n\", root2); 30 31 } 32 33 } Code Sample 26.4.: Quadratic Roots Program in Java 402"