字符类 [a-d[m-p]] 匹配

描述

字符类 [a-d[m-p]] 匹配从 a 到 d 或 m 到 p 的任何字符。

示例

下面的例子展示了字符类匹配的用法。

package com.tutorialspoint;

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

public class CharacterClassDemo {
   private static final String REGEX = "[a-d[m-p]]";
   private static final String INPUT = "dbcabca124ADCmnbc";

   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面的程序，这将产生以下结果 −

Match String start(): 0
Match String start(): 1
Match String start(): 2
Match String start(): 3
Match String start(): 4
Match String start(): 5
Match String start(): 6
Match String start(): 13
Match String start(): 14
Match String start(): 15
Match String start(): 16

❮ java 正则表达式 - 匹配字符类