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Spring 2.5.6 for JDK8
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/* | |
* Copyright 2002-2007 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; | |
/** | |
* Internal helper class used to find the Java/JDK version | |
* that Spring is operating on, to allow for automatically | |
* adapting to the present platform's capabilities. | |
* | |
* <p>Note that Spring requires JVM 1.4 or higher, as of Spring 2.5. | |
* | |
* @author Rod Johnson | |
* @author Juergen Hoeller | |
* @author Rick Evans | |
*/ | |
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; | |
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.indexOf("1.8.") != -1) { | |
majorJavaVersion = JAVA_18; | |
} | |
else if (javaVersion.indexOf("1.7.") != -1) { | |
majorJavaVersion = JAVA_17; | |
} | |
else if (javaVersion.indexOf("1.6.") != -1) { | |
majorJavaVersion = JAVA_16; | |
} | |
else if (javaVersion.indexOf("1.5.") != -1) { | |
majorJavaVersion = JAVA_15; | |
} | |
else { | |
// else leave 1.4 as default (it's either 1.4 or unknown) | |
majorJavaVersion = JAVA_14; | |
} | |
} | |
/** | |
* Return the full Java version string, as returned by | |
* <code>System.getProperty("java.version")</code>. | |
* @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_14)</code>. | |
* @return a code comparable to the JAVA_XX codes in this class | |
* @see #JAVA_13 | |
* @see #JAVA_14 | |
* @see #JAVA_15 | |
* @see #JAVA_16 | |
* @see #JAVA_17 | |
* @see #JAVA_18 | |
*/ | |
public static int getMajorJavaVersion() { | |
return majorJavaVersion; | |
} | |
/** | |
* Convenience method to determine if the current JVM is at least Java 1.4. | |
* @return <code>true</code> if the current JVM is at least Java 1.4 | |
* @see #getMajorJavaVersion() | |
* @see #JAVA_14 | |
* @see #JAVA_15 | |
* @see #JAVA_16 | |
* @see #JAVA_17 | |
* @see #JAVA_18 | |
*/ | |
public static boolean isAtLeastJava14() { | |
return true; | |
} | |
/** | |
* Convenience method to determine if the current JVM is at least | |
* Java 1.5 (Java 5). | |
* @return <code>true</code> if the current JVM is at least Java 1.5 | |
* @see #getMajorJavaVersion() | |
* @see #JAVA_15 | |
* @see #JAVA_16 | |
* @see #JAVA_17 | |
* @see #JAVA_18 | |
*/ | |
public static boolean isAtLeastJava15() { | |
return getMajorJavaVersion() >= JAVA_15; | |
} | |
/** | |
* Convenience method to determine if the current JVM is at least | |
* Java 1.6 (Java 6). | |
* @return <code>true</code> if the current JVM is at least Java 1.6 | |
* @see #getMajorJavaVersion() | |
* @see #JAVA_16 | |
* @see #JAVA_17 | |
* @see #JAVA_18 | |
*/ | |
public static boolean isAtLeastJava16() { | |
return getMajorJavaVersion() >= JAVA_16; | |
} | |
} |
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