Java正则表达式unicode类减法示例

package com.codingdict;



import java.util.regex.Matcher;

import java.util.regex.Pattern;



public class UnicodeCharacterClassDemo {

   private static final String REGEX = "[\\p{L}&&[^\\p{Lu}]]";

   private static final String INPUT = "!BSab\u03B1";



   public static void main(String[] args) {

      // create a pattern

      Pattern  pattern = Pattern.compile(REGEX);

      // get a matcher object

      Matcher matcher = pattern.matcher(INPUT);



      while(matcher.find()) {

         //Prints the start index of the match.

         System.out.println("Match String start(): "+matcher.start());

      }

   }

}