Lesson 1
--------
(not done)


Lesson 2
--------

1. String=text
   int=integer numbers
   double=double precision floating point number

2. String

3. double  (1.414 etc.)

4. int

5. double p = (1.921E-16);

6. int i = 407;

7. String my_name = "enyc";

8. int count;

9. bankBalance = 136.05;
    
10. scooter13, doubled

11. c. e.

12. double dist = 1003;  ok
    int alt = 1493.86 error -- noninteger number



Lesson 3
--------

1.
   public static void main(String args[])
   {
       String s = "The number of rabbits is";
       int argh = 129;
       String report = s + " " + argh + ".";
       System.out.println(report);
   }

2. "GROOVY DUDE" +\n

3. 
   public static void main(String args[])
   {
       String g = "Computer Science is for nerds";
       System.out.println(g.toUpperCase());
   }

4. "Gettysburg address"

5. "ore a"

6. count = 15

7.
   public static void main(String args[])
   {
       String m = "Look here!";
       System.out.println("\""+m+"\" has "+m.length()+" characters");
   }

8. System.out.println("All \"good\" men should come to the aid of their country.");

9. System.out.println("Hello\nHello again");

10. System.out.println("A backslash looks like this \\, ...right?");

11. "e Haskel"

12. "n"



Project... Name that Celebrity
------------------------------

public class main
{
    public static void main(String args[])
    {
        String s1 = "Allan Alda";
        String s2 = "John Wayne";
        String s3 = "Gregory Peck";
        System.out.println(s1+">>>"+cut23(s1));
        System.out.println(s2+">>>"+cut23(s2));
        System.out.println(s3+">>>"+cut23(s3));
    }
    private static String cut23(String input)
    {
        int length=input.length();
        return input.substring(2,length-3);
    }
}



Lesson 4
-------

my experiment
-------------
public class Tester
{
   public static void main(String args[])
   {
       int m=91, y=25;
       // m+=1;
       int before = m;
       int whilee = ++m;
       // int whilee = m++;
       int after = m;
       System.out.println("----");
       System.out.println(before);
       System.out.println(whilee);
       System.out.println(after);
   }
}

note to self: "while" seems to be a reserved word.


exercise on lesson 4
--------------------

1. 109
   104

2. j+ = 1;
   j++;
   ++j;

3. 1992.37

4. System.out.println(zulu--);

5. 3

6. v- = p-30

7. v = v-(p-30)

8. -22

9. 2
   5

10. will not compile -- attempting to assign an integer to a value.

11. double m=3.14 b=3.14 f=3.14;

12. int x y z;

13. "7" (/ is doing integer result due to integer inputs.)

14. nb: this appears to do integer arithmetic due to all inputs
         being integer values.
    Note to self: integer divide truncates rather than rounds
      result -- modulus used to find remainder!!
    Note to self: break down debugging the result to find out
      what is going on!
       System.out.println( "-----" );
       System.out.println( 3/4+5*2/33-3+8*3 );
       System.out.println( 3/4+10/33-3+24 );
       System.out.println( 0 + 0 -3 + 24 );
       System.out.println( -3 + 24 );
       System.out.println( 21 );

    Note to self: problems with - character can be a
      problem! -- might be treated as negative number
      or treated as minus and might depend on spacing?

15. =

16. k = i%j;

17. 4

18. j=j-1;
    j--;
    --j;

Project... Cheating on Your Arithmetic Assignment
-------------------------------------------------

public class Tester
{
    public static void main(String args[])
    {
        int x = 0;
        System.out.println("-----");
        System.out.println("79 + 3 * (4 + 82 - 68) -7 + 19  =  "+(79 + 3 * (4 + 82 - 68) -7 + 19));
        System.out.println("179 + 21 + 10) / 7 + 181 =   "+((179 + 21 + 10) / 7 + 181));
        System.out.println("10389 * 56 * 11 + 2246  =  "+(10389 * 56 * 11 + 2246));
    }
}



Lesson 5
--------

1. final double E 2.718;

2. final int NUM_STUDENTS=236;

3. constants must be defined when declared.

4. should fail to compile

5. "78"

6. yes

7. add "(double)" before the 61/3

8. "10.0"
   nb: result being printed as floating point hence the display of ".0"

9. "17.5"
   nb: entering a ".0" on a number appears to cause the number to be interpreted
        as float hence causing the calculation result to be float too.

10. (3 + 3 * 10.3 - 3 * 5)
    3 + 3 * 7.3 * 5
    "112.5" shomn as output.
    nb: cast float as int appears to truncate rather than round.

11.  *** not done

12. 3
13. 0
14. 4
15. 1

16. int j = (int)d / i

test code:-
    public static void main(String args[])
    {
        double d = 18.3;
        int i = 4;
        int j = (int)d / i;
        System.out.println( j );
    }

17. no


lesson 6
--------

my experiment:-
---------------
   public static void main(String args[])
   {
       System.out.println( "-----" );
       double a = 3.5;
       System.out.println( "a "+ a );
       System.out.println( "floor a "+ Math.floor(a) );
       System.out.println( "ceil a "+ Math.ceil(a) );
       System.out.println( "round a "+ Math.round(a) );
       System.out.println( "abs a "+ Math.abs(a) );
       System.out.println( "(int)a "+ (int)a );
       double b = -7.5;
       System.out.println( "b "+ b );
       System.out.println( "floor b "+ Math.floor(b) );
       System.out.println( "ceil b "+ Math.ceil(b) );
       System.out.println( "round b "+ Math.round(b) );
       System.out.println( "abs b "+ Math.abs(b) );
       System.out.println( "(int)b "+ (int)b );
   } 
-----
a 3.5
floor a 3.0
ceil a 4.0
round a 4
abs a 3.5
(int)a 3
b -7.5
floor b -8.0
ceil b -7.0
round b -7
abs b 7.5
(int)b -7

1. double y = Math.sqrt(x);

2. int k = (j * Math.abs(m));

3. no -- Math.abs() needs int-int or double-double.
   double k = Math.abs(-127.5);

4. System.out.println(Math.pow(2,1.5));

5. -157

6. -158

7. 158

8. 157

9. -157

10. -157

11. 157

12. 158

13. System.out.println(Math.log(18));

14. b = Math.PI * p;

Project... Compute This.
------------------------

*** Not sure how to interpret the Pipe-symbols
     either side of cos ... acos does not appear
     to create the given answer!

    public static void Tester()
    {
        // initialise instance variables
        double d1 = 3 * Math.PI * Math.sin(Math.toRadians(187)) + Math.cos(Math.toRadians(122));
        double d2 = Math.pow(14.72,3.801) + Math.log(72);
        System.out.println("d1 = "+d1+" This seems to be WRONG -- pipes around cos important?");
        System.out.println("d2 = "+d2);
    }

d1 = -1.6785107660514766 This seems to be WRONG -- pipes around cos important?
d2 = 27496.988867001543


Lesson 7
--------

Project... Going in Circles
---------------------------
import java.io.*;
import java.util.*;
public class RadiusOfCircle
{
    public static void main()
    {
        System.out.print("What is the area? ");
        Scanner kbInputObject = new Scanner(System.in);
        double area = kbInputObject.nextDouble();
        double radius = Math.sqrt(area/Math.PI);
        System.out.println("Radius of your circle is "+radius+".");
    }
}


Project... What's My Name?
--------------------------
import java.io.*;
import java.util.*;
public class FullName
{
    public static void main()
    {
        Scanner kbInput = new Scanner(System.in);
        System.out.print("What is your first name? ");
        String firstName = kbInput.nextLine();
        System.out.print("What is your last name? ");
        String lastName = kbInput.nextLine();
        String fullName = firstName+" "+lastName;
        System.out.println("Your full name is "+fullName);
    }
}


Lesson 8
--------

1. true

2. true

3. true

4. false

5. true

6.
a	b	(!a && b)		a	b	(a || !b)
false	false	false			false	false	true
false	true	true			false	true	false
true	false	false			true	false	true
true	true	false			true	true	true

7. b = p && q;

8. w = (x > 0) || (y == z);

9. true false

10. boolean kDog = a != b;

11. boolean kDog = !(a==b);

12. &&

13. ||

14. false

15. true

16. true

17. false

18. false


Lesson 9
--------

1. -- 10.  *** not done

11. if ( m <= 44 )
        b = true;

12. if ( r > 17 )
        b = false;

13. false

14. "Not equal"

15. "Equal"

16. "200","20"

17. if ( g == 34 )
        b = false;

18. boolean b = (k%2) == 0;

19.
import java.io.*;
import java.util.*;
public class Tester
{
   public static void main()
   {
       System.out.print("Enter your password");
       Scanner kbI = new Scanner(System.in);
       String password = kbI.nextLine();
       if (password.equals("XRay"))
       {
           System.out.println("Password entered succcessfully.");
       }
       else
       {
           System.out.println("Incorrect password.");
       }
   } 
}

20. "Two"

Project... Even or Odd?
-----------------------
*** not done


Lesson 10
---------

nb: suspect that "break;" causes no further cases to be
     considered (i.e. leaves the switch statement).

1. char, int

2. 4

3.
switch(myChar)
{
    case 'g':
    case 'G':
        y++;
        break;
    case 'm':
    case 'M';
        y--;
        break;
    default:
        y+=100;
}

4. 3

5. char chr = 'z';

6.
"The sum is 1012"
"The sum is 22"

7.
switch(speed);
{
    case 75:
        System.out.println("Exceeding speed limit");
        break;
    case 69:
    case 70:
        System.out.println("Getting close");
        break;
    case 65:
        System.out.println("Cruising");
        break;
    default:
        System.out.println("Very slow");        
}

8. no

9. char chr = (char)s;

Project... Weight on Other Planets
----------------------------------

import java.io.*;
import java.util.*;
public class Tester
{
   public static void main()
   {
       Scanner kbI = new Scanner(System.in);
       System.out.print("What is your weight on the earth? ");
       double weight = kbI.nextDouble();
       System.out.println("");
       System.out.println("1. Voltar");
       System.out.println("2. krypton");
       System.out.println("3. Fertos");
       System.out.println("4. Servontos");
       System.out.println("");
       System.out.print("Selection? ");
       int selection = kbI.nextInt();
       String planetName;
       switch(selection)
       {
           case 1:
               planetName = "Voltar";
               weight*=0.091;
               break;
           case 2:
               planetName = "Krypton";
               weight*=0.720;
               break;
           case 3:
               planetName = "Fertos";
               weight*=0.865;
               break;
           case 4:
               planetName = "Servontos";
               weight*=4.612;
               break;
           default:
               planetName = "Earth";
       }
       System.out.println("");
       System.out.println("Your weight on "+planetName+" would be "+weight);
    
   } 
}


Lesson 11
---------

1. 5

2. 7

3. 21

4. *** not done

5. *** not done

6. *** not done

7. 
   for(int n=3; n!=48; n*=2 )
       { 
          System.out.println(n);
       }
   } 

8.
   for(int n=24; n!=1; n/=2 )
       { 
          System.out.println(n);
       }
   } 

9. 

10. Control expression

11.
  j=5
  j=10
  j=15
  j=20
  j=25
  j=30
  j=35
  j=40
  j=45
  j=50

12. 16

13. infinite loop

14. 137

Project... Name Reversal
------------------------

public class Tester
{
   public static void main()
   {
       Scanner kbI = new Scanner(System.in);
       System.out.print("Please enter your name. ");
       String inName=kbI.nextLine();
       String outName="";
       int length=inName.length();
       for (int x=length;x>0;x--)
       {
          outName=outName+inName.substring(x-1,x);
       }
       System.out.println(outName.toLowerCase());
   } 
}


lesson 12
---------

1.
while(control expression)
{
    loop content
}

2.
do
{
    loop content
}
while(control expression);

3.
int m;
m=97;
while (m <= 195);
{
   k=k*k+3*m;
   p=p+m+1;
   m++;
}

4.
int v=2
do
{
  k=k*k+3*v;
  q=Math.sqrt(q+v+1);
  v*=3;
}
while (v <= 195);

5. !done

6. ; after do

7. infinite

8. infinite

9.
extra ; after }
(maybe not considered error): 'done' not defined here
   
10. "0,0 0,1 0,2 1,0 1,1 1,2 2,0 2,1 2,2 3,0 3,1 3,2 "

11. break;

12. while or for

13. 3

14.
import java.io.*;
import java.util.*;
public class Tester
{
   public static void main()
   {
       Scanner kbI = new Scanner(System.in);
       int userInput;
       do
       {
           System.out.print("Please enter an integer: ");
           userInput = kbI.nextInt();
           System.out.println(Math.pow(userInput,2));
       } while (userInput != 0);
   } 
}

contest-type-problems
---------------------
*** not done


lesson 13
---------

1. 0x41 (65)

2. 0x5A (90)

3. 0x61 (97)

4. 0x7A (122)

5. 26

6. 0x30 (48)

7. 0x39 (57)

8. displays 26 uppercase ASCII letters

9. displays string s in lowercase.

10. String b = ""+a;

11. char q = p.charAt(0);

12. no

13. yes

14. no

15. "69"

16. "E"

17. char cv = Character.toUppercase(boy);

18. char cv = Character.toLowercase(boy);

19. Character.isDigit(bv)

20. Character.isLetter(bv)

21. Character.isUpperCase(bv)

22. Character.isLetterOrDigit(bv)

23. Character.isLowerCase(bv)

24. prints all ASCII whitespace characters on separate lines.


lesson 14
---------

Project... Basically Speaking
-----------------------------

public class Tester
{
    public static void main()
    {
        System.out.println("Decimal\tBinary\tOctal\tHex\tCharacter");
        for (int x=0x41; x<0x5B; x++)
        {
            System.out.print(x+"\t");
            System.out.print(Integer.toString(x,2)+"\t");
            System.out.print(Integer.toString(x,8)+"\t");
            System.out.print(Integer.toString(x,16)+"\t");
            System.out.println((char)x);
        }
    }
}


lesson 15
---------

Project... What's That Diameter?  // NB: extended this assignment a bit ;-)
--------------------------------  //   did overloaded method and test

public class test
{
    public static void main()
    {
        System.out.println("");
        System.out.println("enyctest Circle class");
        System.out.println("---------------------");
        System.out.println("");
        System.out.println("creating circle0 radius 3");
        System.out.println("creating circle1 diameter 6");
        System.out.println("creating circle2 radius 12");
        System.out.println("creating circle3 diameter 24");
        Circle circle0 = new Circle(3);
        Circle circle1 = new Circle(0,6);
        Circle circle2 = new Circle(12);
        Circle circle3 = new Circle(0,24);
        printCircleDetails(circle0,"circle0");
        printCircleDetails(circle1,"circle1");
        printCircleDetails(circle2,"circle2");
        printCircleDetails(circle3,"circle3");
        System.out.println("resetting circle0 to radius 12");
        System.out.println("resetting circle1 to diameter 24");
        circle0.setRadius(12);
        circle1.setDiameter(24);
        printCircleDetails(circle0,"circle0");
        printCircleDetails(circle1,"circle1");
        printCircleDetails(circle2,"circle2");
        printCircleDetails(circle3,"circle3");        
    }
    public static void printCircleDetails(Circle circleToPrintDetailsOf, String nameOfCircle)
    {
        System.out.println("* Details of Circle apparently named \""+nameOfCircle+"\" :-");
        System.out.print("   radius="+circleToPrintDetailsOf.radius());
        System.out.print("  diameter="+circleToPrintDetailsOf.diameter());
        System.out.print("  area="+circleToPrintDetailsOf.area());
        System.out.println("  circumference="+circleToPrintDetailsOf.circumference());
    }
}


public class Circle
{
    public double radius;
    public double diameter;

    public Circle(double radiusConstructor)
    {
        radius = radiusConstructor;
        diameter = radius*2;
    }

    // enyc trying to overload a constructor (another
    //   constructor method) -- providing to allow
    //   circle to be defined by diameter by passing
    //   0, diameter instead.
    public Circle(int notused, double diameterConstructor)
    {
        diameter = diameterConstructor;
        radius = diameter/2;
    }
    // Seems to work!!!!
    
    public double area()
    {
        double a = Math.PI * Math.pow(radius,2);
        return a;
    }

    public double circumference()
    {
        double c = Math.PI * diameter;
        return c;
    }

    public double diameter()
    {
        double d = diameter;
        return d;
    }

    public double radius()
    {
        return radius;
    }
    
    public void setRadius(double radiusSet)
    {
        radius = radiusSet;
        diameter = radius*2;
    }

    public void setDiameter(double diameterSet)
    {
        diameter = diameterSet;
        radius = diameter/2;
    }    
}

1. *** not done
[...]
20. *** not done

Project... Overdrawn at the Bank
--------------------------------

import java.io.*;
import java.util.*;
public class Tester
{
    public static void main()
    {
        Scanner kbI = new Scanner(System.in);
        System.out.print("amount of money? ");
        String amtstr=kbI.nextLine();
        int amt=Integer.parseInt(amtstr);
        System.out.print("Name? ");
        String name=kbI.nextLine();
        BankAccount myAccount = new BankAccount(amt,name);
        myAccount.deposit(505.22);
        System.out.println(myAccount.balance);
        myAccount.withdraw(100);
        System.out.println("The "+myAccount.name+" account balance is, $"+myAccount.balance);
//        System.out.println(amt);
//        System.out.println(name);
    }
}

public class BankAccount
{
    public double balance;  // These need to be public to allow direct
    public String name;     // access e.g. myAccount.balance

    public BankAccount(double b, String n)
    {
        balance=b;
        name=n;
    }

    public void deposit(double d)
    {
        balance+=d;
    }

    public void withdraw(double w)
    {
        balance-=w;
    }
}


lesson 16
---------

1. true

2. false

3. false

4. false

5. false

6. no -- trying to store String in int

7. calling a private method

8. yes

9. incorrect number of parameters for method

10. no -- trying to reference private variable

11. yes

12.
Surfer surferDude;
surferDude = new Surfer;

13. c.

14. 2505

15. declaring an object but not instantiating it.

16.
first line incorrectly formatted.
second line may or may not work depending if first line
  assumed to instantiate object ok.
third line calling method with string rather than
  integer.

Project... Gas Mileage
----------------------

public class Tester
{
    public static void main()
    {
        Automobile myBmw = new Automobile(24);
        myBmw.fillUp(20);
        myBmw.takeTrip(100);
        double fuel_left = myBmw.reportFuel();
        System.out.println(fuel_left);
    }
}

public class Automobile
{
    private double mpg;
    private double gallons;
    public Automobile(double mpgConstructor)
    {
        mpg = mpgConstructor;
        gallons = 0;
    }
    public void fillUp(double fuelAdded)
    {
        gallons+=fuelAdded;
    }
    public void takeTrip(double milesDriven)
	    {
        gallons-=(milesDriven/mpg);
    }
    public double reportFuel()
    {
        return gallons;
    }
}


lesson 17
---------

Project... "AddemUp"
--------------------
import java.io.*;
import java.util.*;
public class AddemUp
{
   public static void main()
   {
       System.out.println("------------------------------");
       System.out.println("NB: this program runs left-right sum of negative or positive integers.");
       Scanner kbI = new Scanner(System.in);
       String userInput;
       do
       {
           System.out.print("Enter Something like \"8 + 33+ 1,345 -137\": ");
           userInput = kbI.nextLine().trim();
           //System.out.println("trimmed user input is: \""+userInput+"\"");
           Scanner inputScanner = new Scanner(userInput);
           inputScanner.useDelimiter("\\s*\\+\\s*");
           // delimeter is (0 or more whitespace),"+",(0 or more whitespace)
           int newnumber;
           String newstring;
           int total = 0;
           while( inputScanner.hasNext() )
           {
               newstring=inputScanner.next();
               //System.out.println("newstring is: "+newstring);
               total+=dealWithPlusSeparatedParts(newstring.trim());
               //System.out.println("total so far is: "+total);
           }
        System.out.println("Sum is: "+total);
        } while (userInput.length() > 0);
    }
    private static int dealWithPlusSeparatedParts(String inputString)
    {
        // NB: possible to re-use variable names in this method
        //       from the main method as they seem to be independant.
        if ( inputString.length()==0 )
            return 0;
        int initialMultiplier=-1;
        int newNumber;
        int totalNumber=0;
        if ( inputString.charAt(0)=='-' )
            initialMultiplier=1;
        Scanner inputScanner=new Scanner (inputString);
        inputScanner.useDelimiter("\\s*-\\s*");
        while( inputScanner.hasNextInt() )
        {
            newNumber=inputScanner.nextInt();
            //System.out.println("dbg: "+newNumber);
            totalNumber-=(newNumber*initialMultiplier);
            initialMultiplier=1;
            //System.out.println("tot: "+totalNumber);
        }
        return totalNumber;
    }
}


1.  "1"

2.  "14"

3.  "2"

4.  "Lucky hpckey puck"

5.  "1"

6.  "o"

7.  "1"

8.  "14"

9.  "11"

10. "k"

11. "-1"

12. "10"

13. "6"

14. "11"

15. "LuckA hockeA puck"

16. "true"

17. "1"

18. "-1" (or other negative int)

19. "0"

20. "1" (or other positive int)

21. ">>>Gu daay, mates<<<"

22. "Good"

23. "rning,"

24. " how may"

25. "true"
    "p you?"

26. error ("I289" is not an int).


Project... Encryption/Decryption
--------------------------------

import java.io.*;
import java.util.*;
public class Tester
{
        public static void main(String args[])
        {
                Scanner kbReader = new Scanner(System.in);
                System.out.print("Enter a sentence that is to be encrypted: ");
                String sntnc = kbReader.nextLine( );
                System.out.println("Original sentence = " + sntnc);
                Crypto myCryptObj = new Crypto( );
                String encryptdSntnc = myCryptObj.encrypt(sntnc);
                System.out.println("Encrypted sentence = " + encryptdSntnc);
                String decryptdSntnc = myCryptObj.decrypt(encryptdSntnc);
                System.out.println("Decrypted sentence = " + decryptdSntnc);
        }
}

import java.util.*;
public class Crypto
{
    public void Crypto()
    {        
    }
    public String encrypt(String inputString)
    {
        String outputString="";
        Scanner inputScanner = new Scanner(inputString);
        inputScanner.useDelimiter("");
        while (inputScanner.hasNext())
        {
            char a=inputScanner.next().charAt(0);
            switch (a)
            {
                case 'v':
                case 'V':
                outputString+="ag\',r";
                break;
                case 'm':
                case 'M':
                outputString+="ssad";
                break;
                case 'g':
                case 'G':
                outputString+="jeb..w";
                break;
                case 'b':
                case 'B':
                outputString+="dug>?/";
                break;
                default:
                outputString+=a;
            }
        }
        //encryptString=encryptString.replace("v","ag\',r"); // creates g
        //encryptString=encryptString.replace("V","ag\',r");
        //encryptString=encryptString.replace("m","ssad");
        //encryptString=encryptString.replace("M","ssad");
        //encryptString=encryptString.replace("g","jeb..w"); // creates b
        //encryptString=encryptString.replace("G","jeb..w");
        //encryptString=encryptString.replace("b","dug>?/"); // creates g
        //encryptString=encryptString.replace("B","dug>?/");
        return outputString;
    }
    public String decrypt(String decryptString)
    {
        decryptString=decryptString.replace("ag\',r","v");
        decryptString=decryptString.replace("ssad","m");
        decryptString=decryptString.replace("jeb..w","g");
        decryptString=decryptString.replace("dug>?/","b");
        return decryptString;
    }
}


Lesson 18
---------

1.  double sgt[] = new double[800];

2.  "21"

3.  for (int x=0; x<sgt.length; x++)
       {
           sgt[x]=Math.sqrt(x);
       }

4.  * Trying to call Method length() rather than reading
       state variable 'length'.

5.  char cr[] = {'a','b','c','d','e'};

6.  5

7.     int refSumSquares;
       for (x=0, x<ref.length, x++)
       {
           refSumSquares+=ref[x]*ref[x];
       }
       System.out.println(refSumSquares);

8.  Appears to be based on the assumption that arrays
      start with 1.
    This will try to set a value 1 beyond the end of
      the array when k==homer.length and fail.

9.  boolean bbc = heroWorship(dbx);
    public boolean heroWorship(double vb[]) //signature of method

10. 56

11. 23

12. (error -- out of bounds of array index)

13. changes all values in b[] to be absolute with no sign.

14. ">>>123"

15.    int indx;
       for (indx=0;indx<pg.length;indx++)
       {
           if (pg[indx]<0)
               break;
       }

16. "Wh"
    "ping crane"

17. {"fee","fi","fo"}

18. {"One two"}

19. String input = "The best THERE is is Barth";
    int count=(input.toUpperCase()+"x").split("TH").length;


Project... Array of Hope
------------------------

public class Tester
{
    public static void main()
    {
        char ch[] = new char[26];
        for (int x=65; x<91; x++)
            ch[x-65]=(char)x;
        for (int x=65; x<91; x++)
        {
            System.out.print(ch[x-65]);
            switch (x)
            {
               case 90:
               System.out.println("");
               break;
               default:
               System.out.print(", ");
            }
        }
    }
}


Lesson 19
---------


--------------------------

nb: apparently  String.split()  will tokenize a string into a String[]
     array based on a regex..........