POSIX 字符类 \p{Alpha} 匹配

描述

字符类 \p{Alpha} 匹配任何字母字符。

示例

以下示例展示了 POSIX 字符类匹配的用法。

package com.tutorialspoint;

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

public class PosixCharacterClassDemo {
   private static final String REGEX = "\\p{Alpha}";
   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());
      }
   }
}

让我们编译并运行上述程序，以下将是输出结果：-

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