Java tutorial
//package com.java2s; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean isMobileNO(String mobiles) { if (mobiles == null) { return false; } // Pattern p = // Pattern.compile("^((1[0-9][0-9])|(15[^4,\\D])|(18[0-9]))\\d{8}$"); Pattern p = Pattern.compile("^(1)\\d{10}$"); Matcher m = p.matcher(mobiles); return m.matches(); } }