Write code to check if a string is Number via regex
//package com.book2s; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static void main(String[] argv) { String value = "123123"; System.out.println(isNumber(value)); }/* ww w .java 2s . co m*/ public static boolean isNumber(String value) { String regEx = "\\d+\\.{0,}\\d{0,}"; Pattern pattern = Pattern.compile(regEx); Matcher matcher = pattern.matcher(value); boolean result = matcher.matches(); return result; } }