Java tutorial
//package com.java2s; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static Boolean isMobileNo(String str) { Boolean isMobileNo = false; try { Pattern p = Pattern.compile("^((13[0-9])|(14[0-9])|(15[0-9])|(17[0-9])|(18[0-9]))\\d{8}$"); Matcher m = p.matcher(str); isMobileNo = m.matches(); } catch (Exception e) { e.printStackTrace(); } return isMobileNo; } }