/* This method is used to generate a random password
*    @ params int - length of the password
*    @ return  String - random password
*/

public String generateRandomPassword(int length){
        String  passarray = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
        long range = passarray.length();
        String passwd = "";
        for(int i = 0; i < length; ){
            Random generator = new Random();
            int rnd = (int)(range * generator.nextDouble());
            String ch = passarray.substring(rnd,rnd+1);
            if(passwd.indexOf(ch)==-1){
                passwd = passwd + ch;
                i++;
            }
        }
        return passwd;
}