Exam 2 Sample Questions from Spring 2012

Part I, Coding a Complete Program

import java.util.Scanner;
public class GradeEggs {
    public static void main (String [] args) 
    {
        Scanner in = new Scanner(System.in);
        boolean quit = false;
        int weight = 0;
        char color = 'o';
        
        
        while ( ! quit ) {
            System.out.print("Enter weight in ounces: ");
            while ( !in.hasNextInt() ) {
                System.out.println("Error: Enter weight as an int value");
                in.nextLine();
            }
            weight = in.nextInt();
            in.nextLine(); 
            
            System.out.print("Enter color (w-white b-brown o-other): ");
            String colorStr = in.next();
            color = colorStr.charAt(0);
            
            System.out.print( gradeEgg(weight,colorStr.charAt(0) );
            
            System.out.println( "Grade another y/n: " );
            quit = ( in.next().charAt(0) != 'y' );
            
        }
        
    }
    
    private static String gradeEgg( int w, char c ) {
        String grade = "Commerical"; // default if no match
        if ( c == 'w' ) {
            if ( w >= 30 ) 
                grade = "Jumbo";
            else if ( w >= 27 )
                grade = "Extra Large";
            else if ( w >= 24 )
                grade = "Large";
        }
        return grade;
    }
}