org.springframework.core.JdkVersion Maven / Gradle / Ivy
/*
* Copyright 2002-2015 the original author or authors.
*
* Licensed 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
*
* https://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 org.springframework.core;
/**
* Internal helper class used to find the Java/JVM version that Spring is
* operating on, to allow for automatically adapting to the present platform's
* capabilities.
*
* Note that Spring requires JVM 1.6 or higher, as of Spring 4.0.
*
* @author Rod Johnson
* @author Juergen Hoeller
* @author Rick Evans
* @author Sam Brannen
* @deprecated as of Spring 4.2.1, in favor of direct checks for the desired
* JDK API variants via reflection
*/
@Deprecated
public abstract class JdkVersion {
/**
* Constant identifying the 1.3.x JVM (JDK 1.3).
*/
public static final int JAVA_13 = 0;
/**
* Constant identifying the 1.4.x JVM (J2SE 1.4).
*/
public static final int JAVA_14 = 1;
/**
* Constant identifying the 1.5 JVM (Java 5).
*/
public static final int JAVA_15 = 2;
/**
* Constant identifying the 1.6 JVM (Java 6).
*/
public static final int JAVA_16 = 3;
/**
* Constant identifying the 1.7 JVM (Java 7).
*/
public static final int JAVA_17 = 4;
/**
* Constant identifying the 1.8 JVM (Java 8).
*/
public static final int JAVA_18 = 5;
/**
* Constant identifying the 1.9 JVM (Java 9).
*/
public static final int JAVA_19 = 6;
private static final String javaVersion;
private static final int majorJavaVersion;
static {
javaVersion = System.getProperty("java.version");
// version String should look like "1.4.2_10"
if (javaVersion.contains("1.9.")) {
majorJavaVersion = JAVA_19;
}
else if (javaVersion.contains("1.8.")) {
majorJavaVersion = JAVA_18;
}
else if (javaVersion.contains("1.7.")) {
majorJavaVersion = JAVA_17;
}
else {
// else leave 1.6 as default (it's either 1.6 or unknown)
majorJavaVersion = JAVA_16;
}
}
/**
* Return the full Java version string, as returned by
* {@code System.getProperty("java.version")}.
* @return the full Java version string
* @see System#getProperty(String)
*/
public static String getJavaVersion() {
return javaVersion;
}
/**
* Get the major version code. This means we can do things like
* {@code if (getMajorJavaVersion() >= JAVA_17)}.
* @return a code comparable to the {@code JAVA_XX} codes in this class
* @see #JAVA_16
* @see #JAVA_17
* @see #JAVA_18
* @see #JAVA_19
*/
public static int getMajorJavaVersion() {
return majorJavaVersion;
}
}