//Java code to generate 8 or 9 digit alphanumeric code
	private String generateAuthCode() {
		System.out.println("Entering generateAuthCode()");
		//getting the current time in milliseconds
		Date date=new Date();
		long decimalNumber=date.getTime();
		System.out.println("current time in milliseconds: "+decimalNumber);

		//To convert time stamp to alphanumeric code.
		//We need to convert base10(decimal) to base36
		String strBaseDigits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
		String strTempVal = "";
        int mod = 0;
        int authCodeLength = 0;
        // String concat is costly, instead we could have use stringbuffer or stringbuilder
        //but here it wont make much difference.
        while (decimalNumber != 0&&authCodeLength<8) {
            mod=(int) (decimalNumber % 36);
            strTempVal=strBaseDigits.substring(mod,mod+1)+strTempVal;
            decimalNumber=decimalNumber/36;
            authCodeLength++;
        }
        System.out.println("alphanumeric code generated from TimeStamp : "+strTempVal);
        return strTempVal;

}