Java tutorial
//package com.java2s; /******************************************************************************* * Copyright (c) 2010 Actuate Corporation. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Actuate Corporation - initial API and implementation *******************************************************************************/ public class Main { private static final String validStr = "#.0<>()%_"; protected static boolean validType(String str) { for (int count = 0; count < str.length(); count++) { char ch = str.charAt(count); if (validStr.indexOf(ch) == -1) { return false; } } return true; } }