Class Util

java.lang.Object
  Util

public class Util
extends java.lang.Object

Field Summary

static int	ALPHABET_OFFSET Constant that can be used if needed.
static char	INVALIDLETTER_CODE Constant that can be used if needed.

Constructor Summary

Util()

Method Summary

static char	indexToLetter(int index) Performs conversion from integers 0..25 to letters 'A'..'Z'
static int	letterToIndex(char letter) Performs conversion from letters 'A'..'Z' to integers 0..25
static boolean	validLetter(char c) Checks whether the given character is a valid capital letter

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ALPHABET_OFFSET

public static final int ALPHABET_OFFSET

Constant that can be used if needed.

See Also:

Constant Field Values

INVALIDLETTER_CODE

public static final char INVALIDLETTER_CODE

Constant that can be used if needed.

See Also:

Constant Field Values

Constructor Detail

Util

public Util()

Method Detail

letterToIndex

public static int letterToIndex(char letter)

Performs conversion from letters 'A'..'Z' to integers 0..25

Parameters:

letter - is the input letter, a capital letter ('A'..'Z')

Returns:

the corresponding number (0..25)

indexToLetter

public static char indexToLetter(int index)

Performs conversion from integers 0..25 to letters 'A'..'Z'

Parameters:

index - is the input integer (0..25)

Returns:

the output letter ('A'..'Z')

validLetter

public static boolean validLetter(char c)

Checks whether the given character is a valid capital letter

Parameters:

c - is an input character

Returns:

true if and only if c is a capital letter ('A'..'Z')