random Code - Java 2D Graphics

Java examples for 2D Graphics:Image Captcha

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Description

random Code

Demo Code


//package com.java2s;

import java.util.Random;

public class Main {
    public static void main(String[] argv) throws Exception {
        int count = 2;
        System.out.println(randomCode(count));
    }// ww  w.  j  ava2  s . c  o  m

    private static final String RANDOM_STRS = "0123456789";

    public static StringBuffer randomCode(int count) {
        StringBuffer sb = new StringBuffer();
        Random r = new Random();
        for (int i = 0; i < count; i++) {
            int num = r.nextInt(RANDOM_STRS.length());
            sb.append(RANDOM_STRS.charAt(num));
        }
        return sb;
    }
}

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