使用隨機(jī)數(shù)類產(chǎn)生驗證碼
import java.util.Random;
/*
* 驗證碼
*/
public class Demo16 {
public static void main(String[] args) {
char[] arr = {'我','是','a','b','中','c','e','g'};
StringBuilder sb = new StringBuilder();
Random rd = new Random();
int index = 0;
int len = arr.length;
for(int i=0; i<4; i++)
{
index = rd.nextInt(len);
sb.append(arr[index]);
}
//輸出驗證碼
System.out.println(sb);
}
}
