Java Utililty Methods Random Char

char c = (char) (rnd.nextInt(26) + 'a');
return c;

final char[] chars = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q',
        'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };
return chars[getNextRandom(26)];

int len = uniform(0, CHARS.length);
return CHARS[len];

int num = (int) Math.floor(Math.random() * 60);
if (num < 26)
    return (char) ((int) 'a' + num);
num -= 26;
if (num < 26)
    return (char) ((int) 'A' + num);
num -= 26;
if (num < 1)
...

return (char) (int) (Math.random() * 26.0D + 97.0D);

char[] chars = { 'a', 'A', 'b', 'B', 'c', 'C', 'd', 'D', 'e', 'E', 'f', 'F', 'g', 'G', 'h', 'H', 'i', 'I',
        'j', 'J', 'k', 'K', 'l', 'L', 'm', 'M', 'n', 'N', 'o', 'O', 'p', 'P', 'q', 'Q', 'r', 'R', 's', 'S',
        't', 'T', 'u', 'U', 'v', 'V', 'w', 'W', 'x', 'X', 'y', 'Y', 'z', 'Z' };
int index = (int) (Math.random() * 52.0D) - 1;
if (index < 0) {
    index = 0;
return chars[index];
...

return alphabet.charAt(random.nextInt(alphabet.length()));

int index = r.nextInt(letters.length);
return letters[index];

switch (r.nextInt(101) / 100) {
case 0:
case 1:
    return (char) (32 + r.nextInt(127 - 32));
case 2:
case 3:
case 4:
case 5:
...

if (includeSymbols) {
    int ival = (int) (Math.random() * SYMBOLS_AND_CHARS.length());
    return SYMBOLS_AND_CHARS.charAt(ival);
} else {
    int ival = (int) (Math.random() * CHARS.length());
    return CHARS.charAt(ival);