Java Regex捕获组示例

import java.util.regex.Matcher;

import java.util.regex.Pattern;



public class RegexMatches {



   public static void main( String args[] ) {

      // String to be scanned to find the pattern.

      String line = "This order was placed for QT3000! OK?";

      String pattern = "(.*)(\\d+)(.*)";



      // Create a Pattern object

      Pattern r = Pattern.compile(pattern);



      // Now create matcher object.

      Matcher m = r.matcher(line);

      if (m.find( )) {

         System.out.println("Found value: " + m.group(0) );

         System.out.println("Found value: " + m.group(1) );

         System.out.println("Found value: " + m.group(2) );

      }else {

         System.out.println("NO MATCH");

      }

   }

}