forked from plusone/plusone-commons
59 lines
2.0 KiB
Java
59 lines
2.0 KiB
Java
/*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership.
|
|
* The ASF licenses this file to You under the Apache License, Version 2.0
|
|
* (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.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package xyz.zhouxy.plusone.commons.base;
|
|
|
|
import org.apache.commons.lang3.StringUtils;
|
|
import org.apache.commons.lang3.reflect.MethodUtils;
|
|
|
|
/**
|
|
* JRE version
|
|
*/
|
|
public class JRE {
|
|
|
|
private static final int JAVA_8 = 8;
|
|
|
|
public static final int CURRENT_VERSION = getJre();
|
|
|
|
public static boolean isJava8() {
|
|
return CURRENT_VERSION == JAVA_8;
|
|
}
|
|
|
|
private static int getJre() {
|
|
String version = System.getProperty("java.version");
|
|
boolean isBlank = StringUtils.isBlank(version);
|
|
if (!isBlank && version.startsWith("1.8")) {
|
|
return JAVA_8;
|
|
}
|
|
// if JRE version is 9 or above, we can get version from
|
|
// java.lang.Runtime.version()
|
|
try {
|
|
Object javaRunTimeVersion = MethodUtils.invokeMethod(Runtime.getRuntime(), "version");
|
|
return (int) MethodUtils.invokeMethod(javaRunTimeVersion, "major");
|
|
} catch (Exception e) {
|
|
// Can't determine current JRE version (maybe java.version is null),
|
|
// assuming that JRE version is 8.
|
|
}
|
|
// default java 8
|
|
return JAVA_8;
|
|
}
|
|
|
|
private JRE() {
|
|
throw new IllegalStateException("Utility class");
|
|
}
|
|
}
|