正则表达式 问题

Question

/**
 * 给数值字符串插入","格式化数值字符串
 * */
public class LookAroundReplace { public static void main(String[] args) {
String[] numbers = new String[] { "123456", "1234567890" }; String regex = "(?<=\\d)(?=(\\d{3})+(?!\\d))"; for (String number : numbers) {
System.out.println("Before processing:\t" + number);
System.out.println("After processing:\t"
+ number.replaceAll(regex, ","));
} }}高手请分析一下：String regex = "(?<=\\d)(?=(\\d{3})+(?!\\d))";谢谢！！！

Answer 1

请分析一下随便大家来这个帖子接分
http://topic.csdn.net/u/20120919/09/9f6a360b-9944-498c-ad70-73cea769d9b7.html