預定義字元類\s匹配

字元類\s匹配任何空格字元。

示例

以下示例顯示了預定義字元類匹配的用法。

package com.zaixian;

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

public class PredefinedCharacterClassDemo {
   private static final String REGEX = "\\s";
   private static final String INPUT = "dbcabcab12\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());
      }
   }
}

執行上面示例代碼，得到以下結果:

Match String start(): 10