how can i create the 7 digit AlfaNumeric Password .

hi friends
I want to know How can i Create the 7 digit AlfaNumeric Password which
will be unique for every user?
Plz give me Answer
my id is Singh_dharmendra2001@Yahoo.co.in.

[t_mohan]

Hi Dharmendhra,

Probably this could help you , i wrote a program which generates a password randomly, but it generates only numeric password. pls try to enhance it which meets your requirements

import java.util.Date;
import java.util.Random;

public class PasswordGenerator {
private Random rng = null;

public PasswordGenerator(){
rng = new Random((new Date()).getTime());
}

public String generatePassword() {
StringBuffer buff = new StringBuffer();
while (buff.length() < 8) {

buff.append(Math.abs(rng.nextInt()));
}

return buff.substring(0, 7);
}
public static void main(String args[])
{
PasswordGenerator pg = new PasswordGenerator();
System.out.println("Generated Password:"+pg.generatePassword());
}
}

It is a compiled code and executing fine

If u need any help, post a reply again

Thanks
Mohan.T

[t_mohan]

Hi Dharmendra

This is the code, which generates Random Password with alpha-numeric characters

Please feel free to ask me if you have any questions

import java.util.Date;
import java.util.Random;
import java.security.SecureRandom;

public class PasswordGenerator {
protected SecureRandom rand;
protected char[] firstAlphabet;
protected char[] lastAlphabet;
protected char[] alphabet;
public PasswordGenerator(){
rand = new SecureRandom();
}
public String generatePassword(char[] printableAlphabets) {
String generatedPassword = new String(getPasswordChars(printableAlphabets));
return generatedPassword.substring(0,7);
}
public char[] getPasswordChars(char[] pass){
int length = pass.length;
for (int i=0; i char[] useAlph = alphabet;
if (i == 0 && firstAlphabet != null){
useAlph = firstAlphabet;
} else if (i == length - 1 && lastAlphabet != null){
useAlph = lastAlphabet;
}
int size = avoidRepetition(useAlph, pass, i, 2, useAlph.length);
pass[i] = useAlph[rand.nextInt(size)];
}
return(pass);
}
private static int avoidRepetition(char[] alph, char[] pass, int passSize, int repetition, int alphSize){
if (repetition > -1){
int repPos = 0;
while ((repPos = findRepetitions(pass, repPos, passSize, repetition)) != -1){
alphSize -= moveChars(alph, alphSize, pass[repPos+repetition]);
repPos++;
}
if (alphSize == 0) alphSize = alph.length;
}
return alphSize;
}
private static int findRepetitions(char[] pass, int start, int end, int length){
for (int i=start; i boolean onTrack = true;
for (int j=0; onTrack && j if (pass[i+j] != pass[end-length+j]) onTrack = false;
}
if(onTrack) return i;
}
return -1;
}
private static int moveChars(char[] alph, int numGood, char c){
int count = 0;
for (int i=0; i if (alph[i] == c){
numGood--;
char temp = alph[numGood];
alph[numGood] = alph[i];
alph[i] = temp;
count++;
}
}
return count;
}
public void setFirstAlphabet(char[] alphabet){
if (alphabet == null || alphabet.length == 0){
this.firstAlphabet = null;
} else {
this.firstAlphabet = alphabet;
}
}
public void setLastAlphabet(char[] alphabet){
if (alphabet == null || alphabet.length == 0){
this.lastAlphabet = null;
} else {
this.lastAlphabet = alphabet;
}
}
public void setAlphabet(char[] alphabet){
if (alphabet == null) throw new NullPointerException("Null alphabet");
if (alphabet.length == 0) throw new ArrayIndexOutOfBoundsException("No characters in alphabet");
this.alphabet = alphabet;
}
public static void main(String args[])
{
final char[] PRINTABLE_ALPHABET = {
'0','1','2','3','4','5','6','7','8',
'9','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',};
PasswordGenerator pg = new PasswordGenerator();
pg.setAlphabet(PRINTABLE_ALPHABET);
pg.setFirstAlphabet(PRINTABLE_ALPHABET);
pg.setLastAlphabet(PRINTABLE_ALPHABET);
System.out.println("Generated Password:"+pg.generatePassword(PRINTABLE_ALPHABET));
}

}

[Dharmendra Singh]

Thanks Mohan.T to clear my concept i wil try it?
Bye
Dharmendra Singh

[Dharmendra Singh]

Originally Posted by t_mohan

Hi Dharmendhra,

Probably this could help you , i wrote a program which generates a password randomly, but it generates only numeric password. pls try to enhance it which meets your requirements

import java.util.Date;
import java.util.Random;

public class PasswordGenerator {
private Random rng = null;

public PasswordGenerator(){
rng = new Random((new Date()).getTime());
}

public String generatePassword() {
StringBuffer buff = new StringBuffer();
while (buff.length() < 8) {

buff.append(Math.abs(rng.nextInt()));
}

return buff.substring(0, 7);
}
public static void main(String args[])
{
PasswordGenerator pg = new PasswordGenerator();
System.out.println("Generated Password:"+pg.generatePassword());
}
}

It is a compiled code and executing fine

If u need any help, post a reply again

Thanks

Mohan.T

[Dharmendra Singh]

Hi Mohan.T
Your code for generate the AlfaNumeric Password is not compile it is showing the error.plz send me compile code.i m waiting ur reply.
Thanks
Dharmendra singh

[t_mohan]

Hi Dharmendra,

I dont know how it has missed some of the text while copying . i wrote my code and compiled it and tested. After making sure it is working i copied it on the forum. anyway i sent u the code to ur mail id. Pls find the attached File in ur mail box singh_dharmendra2001@yahoo.co.in from mohan.thutta@gmail.com

Thank You
Mohan.T

[golikrishna]

Hi ,
i am getting one problem tha is "i want to retrieve the contents from any web page into my own page,so how can i retrieve the contents of the web page,and how can i display multiple windows in my own page and every window should refresh for every 30 sec ,could u tell me plzzz

[t_mohan]

I couldnot understand ur question krishna,pls be clear then probably i can help you.