facebook 6 digit confirmation code hack

Case: Send SMS Verification Code, verification code when the random 6-digit number: The code is as follows: Getrandnum (max) { randnum = min + (int) (Math.random () * ((max-min) + 1)); randnum; } @Test rand () { System. out. println (+ getrandnum (1,999999)

In html, color represents the most commonly used 6-digit hexadecimal code notation. In addition, color can also be represented by rgb (r, g, B). r, g, B Represents red, green, and blue in decimal number or percentage from 0 to, respectively. If you are interested, you can see that there are 3 Representation Methods in the HTML, the most commonly used is the

Generation ID template: year, month, day, hour, minute, and second + 6-digit auto-increment code Because the order ID, product ID, or any ID is generated, and you do not want to use auto-increment, and are afraid of repetition, you can use the year and day minute and second + 6-dig