org.springframework.core.JdkVersion Maven / Gradle / Ivy
/*
* Copyright 2002-2005 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
*
* 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 org.springframework.core;
/**
* Helper class used to find the current Java/JDK version.
* Usually we want to find if we're in a 1.4 or higher JVM.
* (Spring does not support 1.2 JVMs.)
* @author Rod Johnson
* @author Juergen Hoeller
*/
public class JdkVersion {
public static final int JAVA_13 = 0;
public static final int JAVA_14 = 1;
public static final int JAVA_15 = 2;
private static String javaVersion;
private static int majorJavaVersion = JAVA_13;
static {
javaVersion = System.getProperty("java.version");
// should look like "1.4.1_02"
if (javaVersion.indexOf("1.4.") != -1) {
majorJavaVersion = JAVA_14;
}
else if (javaVersion.indexOf("1.5.") != -1) {
majorJavaVersion = JAVA_15;
}
// else leave as 1.3 default
}
/**
* Return the full Java version string, as returned by
* System.getProperty("java.version")
.
*/
public static String getJavaVersion() {
return javaVersion;
}
/**
* Get the major version code. This means we can do things like
* if (getMajorJavaVersion() < JAVA_14)
.
* @return a code comparable to the JAVA_XX codes in this class
* @see #JAVA_13
* @see #JAVA_14
* @see #JAVA_15
*/
public static int getMajorJavaVersion() {
return majorJavaVersion;
}
}