001/**
002 * Copyright (c) 2025-2026, Michael Yang 杨福海 (fuhai999@gmail.com).
003 * <p>
004 * Licensed under the GNU Lesser General Public License (LGPL) ,Version 3.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 * <p>
008 * http://www.gnu.org/licenses/lgpl-3.0.txt
009 * <p>
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package dev.tinyflow.core.util;
017
018public class StringUtil {
019
020    public static boolean noText(String string) {
021        return !hasText(string);
022    }
023
024    public static boolean hasText(String string) {
025        return string != null && !string.isEmpty() && containsText(string);
026    }
027
028    public static boolean hasText(String... strings) {
029        for (String string : strings) {
030            if (!hasText(string)) {
031                return false;
032            }
033        }
034        return true;
035    }
036
037    private static boolean containsText(CharSequence str) {
038        for (int i = 0; i < str.length(); i++) {
039            if (!Character.isWhitespace(str.charAt(i))) {
040                return true;
041            }
042        }
043        return false;
044    }
045
046    public static String getFirstWithText(String... strings) {
047        if (strings == null) {
048            return null;
049        }
050        for (String str : strings) {
051            if (hasText(str)) {
052                return str;
053            }
054        }
055        return null;
056    }
057
058    /**
059     * 判断字符串是否是数字
060     *
061     * @param string 需要判断的字符串
062     * @return boolean 是数字返回 true，否则返回 false
063     */
064    public static boolean isNumeric(String string) {
065        if (string == null || string.isEmpty()) {
066            return false;
067        }
068        char[] chars = string.trim().toCharArray();
069        for (char c : chars) {
070            if (!Character.isDigit(c)) {
071                return false;
072            }
073        }
074        return true;
075    }
076
077
078}