Android Utililty Methods Char Value Check

List of utility methods to do Char Value Check

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Description

The list of methods to do Char Value Check are organized into topic(s).

Method

booleanisWhitespace(char ch)
Returns true if the specified character is a whitespace character (CR, LF, SP or HT). 
return ch == SP || ch == HT || ch == CR || ch == LF;
booleanisLetter(char c)
is Letter 
int k = 0x80;
return c / k == 0 ? true : false;
booleanisOctal(char c)
is Octal 
return (c >= '0') && (c <= '7');
booleanisWordSeparator(char c)
is Word Separator 
for (int i = 0; i < WORD_SEPARATORS.length; i++) {
    if (WORD_SEPARATORS[i] == c) {
        return true;
return false;
booleanisKana(char character)
is Kana 
int charCode = (int) character;
return (charCode > 12352 && charCode < 12438)
        || (charCode > 12449 && charCode < 12538);
booleanisWordSeparator(char c, char[] wordSeparators)
is Word Separator 
if (wordSeparators == null) {
    return false;
for (int i = 0; i < wordSeparators.length; i++) {
    if (wordSeparators[i] == c) {
        return true;
return false;
intgetSpecialCharLength(char c)
get Special Char Length 
if (isLetter(c)) {
    return 1;
} else {
    return 2;
intgetCharsLength(char[] chars, int specialCharsLength)
get Chars Length 
int count = 0;
int normalCharsLength = 0;
for (int i = 0; i < chars.length; i++) {
    int specialCharLength = getSpecialCharLength(chars[i]);
    if (count <= specialCharsLength - specialCharLength) {
        count += specialCharLength;
        normalCharsLength++;
    } else {
...
intgetNthIndexOf(char c, String str, int n)
find the nth index of a char c in a string. 
if (n < 1) {
    throw new IllegalArgumentException("n must be >= 1: " + n);
int index = str.indexOf(c);
int count = 0;
while (index != -1 && (++count) < n) {
    index = str.indexOf(c, index + 1);
return index;
intdisplayWidth(char ch)
Returns the approximate display width of the character, measured in units of ascii characters. 
if (ch <= '\u04f9' || 
        ch == '\u05be' || 
        (ch >= '\u05d0' && ch <= '\u05ea') || 
        ch == '\u05F3' || 
        ch == '\u05f4' || 
        (ch >= '\u0600' && ch <= '\u06ff') || 
        (ch >= '\u0750' && ch <= '\u077f') || 
        (ch >= '\ufb50' && ch <= '\ufdff') || 
...