001/**
002 * Copyright (c) 2015-2022, Michael Yang 杨福海 (fuhai999@gmail.com).
003 * <p>
004 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
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 io.jboot.app;
017
018public class JdkUtil {
019
020    public static boolean isJdk1x() {
021        //1.8.0_261
022        String javaVersion = System.getProperty("java.version");
023        return javaVersion != null && javaVersion.startsWith("1.");
024    }
025
026
027    public static boolean isJdk11To19() {
028        //17.0.1
029        String javaVersion = System.getProperty("java.version");
030        return javaVersion != null && javaVersion.startsWith("1")
031                && javaVersion.indexOf(".") == 2;
032    }
033
034
035}