动态生成n位随机字符数组

[java]代码库

/**
 * 动态生成n位随机字符数组
 *
 * @author 苏持恒
 */
public class ShortMessageCodeUntil
{


    /**
     * 随机生成4位数字字符数组
     *
     * @return rands
     */
    public static char[] generateCheckCode()
    {
        String chars = "0123456789";
        char[] rands = new char[4];
        for (int i = 0; i < 4; i++)
        {
            int rand = (int) (Math.random() * 10);
            rands[i] = chars.charAt (rand);
        }
        return rands;
    }


    /**
     * 随机生成6位数字字符数组
     *
     * @return rands
     */
    public static char[] generateCheckPass()
    {
        String chars = "0123456789";
        char[] rands = new char[6];
        for (int i = 0; i < 6; i++)
        {
            int rand = (int) (Math.random() * 10);
            rands[i] = chars.charAt (rand);
        }
        return rands;
    }


}