Java Utililty Methods Password Generate

List of utility methods to do Password Generate

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Description

The list of methods to do Password Generate are organized into topic(s).

Method

StringgeneratePassword()
generate Password 
try {
    char[] charArray = "abcdefghijklmnopqrstuvwxyz".toCharArray();
    StringBuilder stringBuilder = new StringBuilder();
    Random random = new Random();
    for (int i = 0; i < 10; i++) {
        char c = charArray[random.nextInt(charArray.length)];
        stringBuilder.append(c);
    String randomPassword = stringBuilder.toString();
    return randomPassword;
} catch (Exception e) {
    throw new Exception("Password generation failed!");
StringgeneratePassword()
Generates a random password of 8 characters 
String password = "";
String values[] = { "a", "b", "c", "d", "e", "f", "g", "h", "j", "k", "l", "m", "n", "p", "q", "r", "s",
        "t", "u", "v", "z", "x", "y", "1", "2", "3", "4", "5", "6", "7", "8", "9", "&", "%", "?", "!", "A",
        "B", "C", "D", "E", "F", "G", "H", "J", "K", "L", "M", "N", "P", "Q", "R", "S", "T", "U", "V", "Z",
        "X", "Y" };
Random ran = new Random();
int range = values.length;
int number;
...
StringgeneratePassword()
generate Password 
String password = "";
for (int i = 0; i < 30; i++) {
    Random rand = new Random();
    password += random_str.charAt(rand.nextInt(random_str.length()));
return password;
StringgeneratePassword()
Generate password from alpha numerics characters in total length 8 characters. 
final char[] chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".toCharArray();
final StringBuilder sb = new StringBuilder();
final Random random = new Random();
for (int i = 0; i < PASSWORD_LENGT; i++) {
    final char c = chars[random.nextInt(chars.length)];
    sb.append(c);
return sb.toString();
...
StringgeneratePassword()
generate Password 
StringBuilder builder = new StringBuilder();
for (int i = 0; i < 10; i++) {
    int r = Math.abs(random.nextInt());
    builder.append((char) (33 + r % (126 - 33)));
return builder.toString();
StringgeneratePassword()
generate Password 
int[] array = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
Random rand = new Random();
for (int i = 10; i > 1; i--) {
    int index = rand.nextInt(i);
    int tmp = array[index];
    array[index] = array[i - 1];
    array[i - 1] = tmp;
int result = 0;
for (int i = 0; i < 6; i++)
    result = result * 10 + array[i];
return String.valueOf(result);
StringgeneratePassword(int lenght)
generate Password 
StringBuffer sb = new StringBuffer();
for (int i = 0; i < lenght; i++) {
    sb.append(_goodChar[_random.nextInt(_goodChar.length)]);
return sb.toString();
StringgeneratePassword(int length)
generate Password 
if (length <= 0) {
    return "";
Random random = new Random();
StringBuilder sb = new StringBuilder();
String exCludeChar = "'<>&";
String[] charSets = { DIGITS, LETTERS, SPECIALS };
for (int i = 0; i < length; i++) {
...
StringgeneratePassword(int length)
Generates a random password with the specified length. 
StringBuffer pwd = new StringBuffer();
Random rnd = new Random();
for (int i = 0; i < length; i++) {
    pwd.append(pwdChars.charAt(rnd.nextInt(pwdChars.length())));
return pwd.toString();
StringgeneratePassword(int length, boolean special)
Generates a random String of characters of the specified length. 
final char[] characters = new char[] { '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', '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', '0', '1',
        '2', '3', '4', '5', '6', '7', '8', '9', '~', '`', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_',
        '-', '+', '=', '[', '{', '}', ']', '\\', '|', ';', ':', '\'', '"', '<', ',', '>', '.', '?', '/' };
String password = "";
for (int i = 0; i < length; i++) {
    password += characters[(new Random()).nextInt(special ? characters.length : 62)];
...