Java Utililty Methods Char Array Create

List of utility methods to do Char Array Create

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Description

The list of methods to do Char Array Create are organized into topic(s).

Method

char[]toCharArray(CharSequence chars)
to Char Array 
if (chars instanceof String)
    return ((String) chars).toCharArray();
char[] re = new char[chars.length()];
for (int i = 0; i < re.length; i++)
    re[i] = chars.charAt(i);
return re;
char[]toCharArray(CharSequence charSequence)
Copies the given CharSequence into a new char[] . 
final int numChars = charSequence.length();
char[] charArray = new char[numChars];
for (int i = 0; i < numChars; i++) {
    charArray[i] = charSequence.charAt(i);
return charArray;
char[]toCharArray(CharSequence charSequence)
Converts a CharSequence into a char [] array. 
char[] array = new char[charSequence.length()];
for (int i = 0; i < charSequence.length(); i++) {
    array[i] = charSequence.charAt(i);
return array;
char[]toCharArray(CharSequence cs)
Green implementation of toCharArray. 
if (cs instanceof String) {
    return ((String) cs).toCharArray();
} else {
    int sz = cs.length();
    char[] array = new char[cs.length()];
    for (int i = 0; i < sz; i++) {
        array[i] = cs.charAt(i);
    return array;
char[][]toCharArray(double[][] array)
to Char Array 
int nr = array.length;
int nc = array[0].length;
char[][] ret = new char[nr][nc];
for (int i = 0; i < nr; i++) {
    for (int j = 0; j < nc; j++) {
        ret[i][j] = (char) array[i][j];
return ret;
char[]toCharArray(final byte[] array)
to Char Array 
return toCharArray(array, 0, array.length);
char[]toCharArray(int number, int exactArrayLength)
Converts the given number into a char-array. 
char[] charArray = null;
String numberString = Integer.toString(number);
char[] numberChars = numberString.toCharArray();
if (numberChars.length > exactArrayLength) {
    charArray = new char[exactArrayLength];
    for (int i = 0; i < charArray.length; i++) {
        charArray[i] = numberChars[i];
} else if (numberChars.length < exactArrayLength) {
    charArray = new char[exactArrayLength];
    int offset = exactArrayLength - numberChars.length;
    for (int i = 0; i < charArray.length; i++) {
        charArray[i] = (i < offset) ? '0' : numberChars[i - offset];
} else {
    charArray = numberChars;
return charArray;
char[]toCharArray(String map)
to Char Array 
int[] values = toIntArray(map);
if (values == null) {
    return null;
char[] chars = new char[values.length];
for (int i = 0; i < values.length; i++) {
    chars[i] = (char) values[i];
return chars;
char[]toCharArray(String s)
Converts the given string into an array of characters. 
return s == null ? new char[] {} : s.toCharArray();
char[]toCharArray(String s)
toCharArray should return a new array always, however some devices might suffer a bug that allows mutating a String (serious security hole in the JVM) hence this method simulates the proper behavior 
if (!charArrayBugTested) {
    charArrayBugTested = true;
    if (s.toCharArray() == s.toCharArray()) {
        charArrayBug = true;
if (charArrayBug) {
    char[] c = new char[s.length()];
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