com.sun.labs.minion.util
Class CharUtils

java.lang.Object
  com.sun.labs.minion.util.CharUtils

public class CharUtils
extends java.lang.Object

Some char utilities.

Field Summary

protected static char[]	toLowerCase Return the lower case of a char.
protected static char[]	toUpperCase Return the upper case of a char.

Constructor Summary

CharUtils()

Method Summary

static boolean	caseRoundTrip(char c) Converts a character to lower case and then converts the lower case to uppercase.
static java.lang.String	decodeUnicode(java.lang.String input) Method that traslates unicode escape sequences in an input string into appropriate unicode chars.
static boolean	isUncased(java.lang.String s) A method to check whether a given string has the same all upper and all lower case forms.
static boolean	isUpper(char c) Tests whether a given character is upper case.
static void	main(java.lang.String[] arg) Tests the upper and lowercase
static char	toLowerCase(char c) Lowercases a single character using our lower case array.
static java.lang.String	toLowerCase(java.lang.String s) Lower cases a string, using our lower case array.
static char	toUpperCase(char c) Upper cases a single character, using our upper case array.
static java.lang.String	toUpperCase(java.lang.String s) Uppercases a string, using our upper case array.

Methods inherited from class java.lang.Object

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

Field Detail

toLowerCase

protected static final char[] toLowerCase

Return the lower case of a char. Unlike Java's Character.toLowerCase(), this version is free of loops and paths (!).

toUpperCase

protected static final char[] toUpperCase

Return the upper case of a char. Unlike Java's Character.toUpperCase(), this version is free of loops and paths (!).

Constructor Detail

CharUtils

public CharUtils()

Method Detail

toLowerCase

public static java.lang.String toLowerCase(java.lang.String s)

Lower cases a string, using our lower case array.

Parameters:

s - The string that we wish to lowercase.

Returns:

The lowercase version of the string.

toLowerCase

public static char toLowerCase(char c)

Lowercases a single character using our lower case array.

Parameters:

c - The character to lowercase.

Returns:

The lowercase version of the character.

toUpperCase

public static java.lang.String toUpperCase(java.lang.String s)

Uppercases a string, using our upper case array.

Parameters:

s - The string to uppercase.

Returns:

The upper case version of the string.

toUpperCase

public static char toUpperCase(char c)

Upper cases a single character, using our upper case array.

Parameters:

c - The character to upper case.

Returns:

The uppercase character.

isUpper

public static boolean isUpper(char c)

Tests whether a given character is upper case.

Parameters:

c - The character to test.

Returns:

true if the character is upper case, false otherwise

isUncased

public static boolean isUncased(java.lang.String s)

A method to check whether a given string has the same all upper and all lower case forms.

Parameters:

s - The string to test.

Returns:

true if the given string has identical upper and lower case forms.

decodeUnicode

public static final java.lang.String decodeUnicode(java.lang.String input)

Method that traslates unicode escape sequences in an input string into appropriate unicode chars.

Parameters:

input - The input string to be translated.

Returns:

The string with unicode escape sequences replaced with actual unicode characters.

caseRoundTrip

public static boolean caseRoundTrip(char c)

Converts a character to lower case and then converts the lower case to uppercase.

Parameters:

c - The character.

Returns:

true if the character survives the roundtrip, false otherwise.

main

public static void main(java.lang.String[] arg)
                 throws java.lang.Exception

Tests the upper and lowercase

Parameters:

arg - Arguments

Throws:

java.lang.Exception - If anything goes wrong.