无双于世的专栏

[code="java"]public class Random { public static void main(String[] args) { StringBuffer sBuffer=new StringBuffer(""); for (int i = 0; i < 20; i++) { char randomCharacter=getRandomCharac...

时间格式化：[code="java"]SimpleDateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String dateString=dateFormat.format(new Date());[/code]