java學(xué)習(xí)

package com.test;


/**
 * 動(dòng)態(tài)生成隨機(jī)字符數(shù)組
 *  
 *
 */
public class ShortMessageCodeUntil
{


    /**
     * 隨機(jī)生成4位數(shù)字字符數(shù)組
     *  
     * @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;
    }


    /**
     * 隨機(jī)生成6位數(shù)字字符數(shù)組
     *  
     * @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;
    }
public static void main(String[] args) {
    ShortMessageCodeUntil sm = new ShortMessageCodeUntil();
    System.out.println(sm.generateCheckCode());
    System.out.println(sm.generateCheckPass());
}

}