POSIX字元類\p{XDigit}匹配

POSIX字元類\p{XDigit}匹配任何十六進位制字元。

範例

以下範例顯示了Posix字元類匹配的用法。

package com.yiibai;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class PosixCharacterClassDemo {
   private static final String REGEX = "\\p{XDigit}";
   private static final String INPUT = "Bb12\tc!";

   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());
      }
   }
}

執行上面範例程式碼，得到以下結果:

Match String start(): 0
Match String start(): 1
Match String start(): 2
Match String start(): 3
Match String start(): 5