Java tutorial
//package com.java2s; /* * Copyright (C) 2011 The LiteListen Project * * Licensed under the Mozilla Public Licence, version 1.1 (the "License"); * You may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.mozilla.org/MPL/MPL-1.1.html * * 2011 * Mozilla Public Licence 1.1 * * * * http://www.mozilla.org/MPL/MPL-1.1.html */ public class Main { public static boolean IsNumeric(String number) { for (int i = 0; i < number.length(); i++) { if (!Character.isDigit(number.charAt(i))) return false; } return true; } }