JAVAの基礎（正規表現 - 取得機能）

1、正規表現の取得機能

    *パターンマッチと併用

 

 

import java.util.regex.Matcher;

import java.util.regex.Pattern;





public class Demo8_Pattern {





    /**

     * Pattern p = Pattern.compile("a*b");

         Matcher m = p.matcher("aaaaab");

         boolean b = m.matches();

         

        * A:正则表达式的获取功能

            * Pattern和Matcher的结合使用

        * B:案例演示

            * 需求：把一个字符串中的手机号码获取出来

     */

    public static void main(String[] args) {

        //demo1();

        String s = "我的手机是18511866260,我曾用过18987654321,还用过18812345678";

        String regex = "1[3578]\\d{9}";

        

        

        Pattern p = Pattern.compile(regex);

        Matcher m = p.matcher(s);

        

        /*boolean b1 = m.find();

        System.out.println(b1);

        System.out.println(m.group());

        

        boolean b2 = m.find();

        System.out.println(b2);

        System.out.println(m.group());*/

        

        while(m.find())

            System.out.println(m.group());

    }





    public static void demo1() {

        Pattern p = Pattern.compile("a*b");                    //获取到正则表达式

        Matcher m = p.matcher("aaaaab");                    //获取匹配器

        boolean b = m.matches();                            //看是否能匹配,匹配就返回true

        

        System.out.println(b);

        

        System.out.println("aaaaab".matches("a*b"));          //与上面的结果一样

    }





}