password generator in java
/** Minimum length for a decent password */
public static final int MIN_LENGTH = 10;
/** The random number generator. */
protected static java.util.Random r = new java.util.Random();
/*
* Set of characters that is valid. Must be printable, memorable, and "won't
* break HTML" (i.e., not ' <', '>', '&', '=', ...). or break shell commands
* (i.e., not ' <', '>', '$', '!', ...). I, L and O are good to leave out,
* as are numeric zero and one.
*/
protected static char[] goodChar = { 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K',
'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
'2', '3', '4', '5', '6', '7', '8', '9', '+', '-', '@', };
/* Generate a Password object with a random password. */
public static String getNext() {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < MIN_LENGTH; i++) {
sb.append(goodChar[r.nextInt(goodChar.length)]);
}
return sb.toString();
}
public static void main(String[] argv) {
for (int i = 0; i < 20; i++) {
System.out.println(PassPhrase.getNext());
}
}
}
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