学步园

package regexp;<br /> import java.util.Arrays;<br /> import java.util.regex.Matcher;<br /> import java.util.regex.Pattern;<br /> public class NumberCount {<br /> public static void main(String[] args) {<br /> Integer c[] = new Integer[] { 2, 3, 2, 2, 2, 5, 3, 2, 2, 6, 2, 2, 6, 2,<br /> 2, 3, 9, 1, 2, 2 };<br /> Arrays.sort(c);<br /> String str = "";<br /> for (int i = 0; i < c.length; i++) {<br /> str += c[i];<br /> }<br /> Matcher m = Pattern.compile("//G(//d)//1*").matcher(str);<br /> while (m.find()) {<br /> System.out.println(m.group(1) + ":" + m.group().length());<br /> }<br /> }<br /> }<br />  

Pattern p3=Pattern.compile("(//d(//d))//2");//小括号代表一个组；<br /> String s3="122";<br /> Matcher m3= p3.matcher(s3);<br /> p(m3.matches());