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import java.util.regex.Matcher; import java.util.regex.Pattern; public class MatcherDemo { private static String REGEX = "(a*b)(foo)"; private static String INPUT = "aabfooaabfooabfoob"; private static String REPLACE = "-"; public static void main(String[] args) { Pattern pattern = Pattern.compile(REGEX); // get a matcher object Matcher matcher = pattern.matcher(INPUT); while(matcher.find()) { //Prints the start index of the subsequence captured by the given group. System.out.println("Second Capturing Group, (foo) Match String start(): "+matcher.start(1)); } } }
运行结果 :
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