Java生成随机数

[java]代码库

import java.util.Random;

public class RandomCode {

    public String getrandomCode(){
        Random random = new Random();
        StringBuffer randomCode = new StringBuffer();
        int countCode = 4;
        char[] codeSequence = { '0', '1', '2', '3', '4', '5', '6', '7', '8',
        '9' };
        for(int i=0;i<countCode;i++){
            String strRand = String.valueOf(
                    codeSequence[random.nextInt(codeSequence.length)]);
            randomCode.append(strRand);
        }
        return randomCode.toString();
    }

    public static void main(String[] args) {
        RandomCode rd = new RandomCode();
        String str = rd.getrandomCode();
        System.out.println(str);

    }
}

//源代码片段来自云代码http://yuncode.net