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

public class test {
 public static void main(String[] args) {
  getStrings(); //用正則表達式獲取指定字符串內容中的指定內容
  System.out.println("********************");
  replace(); //用正則表達式替換字符串內容
  System.out.println("********************");
  strSplit(); //使用正則表達式切割字符串
  System.out.println("********************");
  strMatch(); //字符串匹配
 }

 private static void strMatch() {
  String phone = "13539770000";
  //檢查phone是否是合格的手機號(標準:1開頭，第二位為3,5,8，后9位為任意數字)
  System.out.println(phone + ":" + phone.matches("1[358][0-9]{9,9}")); //true 
  
  String str = "abcd12345efghijklmn";
  //檢查str中間是否包含12345
  System.out.println(str + ":" + str.matches("\\w+12345\\w+")); //true
  System.out.println(str + ":" + str.matches("\\w+123456\\w+")); //false
 }

 private static void strSplit() {
  String str = "asfasf.sdfsaf.sdfsdfas.asdfasfdasfd.wrqwrwqer.asfsafasf.safgfdgdsg";
  String[] strs = str.split("\\.");
  for (String s : strs){
   System.out.println(s);
  }  
 }

 private static void getStrings() {
  String str = "rrwerqq84461376qqasfdasdfrrwerqq84461377qqasfdasdaa654645aafrrwerqq84461378qqasfdaa654646aaasdfrrwerqq84461379qqasfdasdfrrwerqq84461376qqasfdasdf";
  Pattern p = Pattern.compile("qq(.*?)qq");
  Matcher m = p.matcher(str);
  ArrayList<String> strs = new ArrayList<String>();
  while (m.find()) {
   strs.add(m.group(1));   
  } 
  for (String s : strs){
   System.out.println(s);
  }  
 }

 private static void replace() {
  String str = "asfas5fsaf5s4fs6af.sdaf.asf.wqre.qwr.fdsf.asf.asf.asf";
  //將字符串中的.替換成_，因為.是特殊字符，所以要用\.表達，又因為\是特殊字符，所以要用\\.來表達.
  str = str.replaceAll("\\.", "_");
  System.out.println(str);  
 }
}