001/* 002 * Copyright 2002-2015 the original author or authors. 003 * 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 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 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 */ 016 017package org.springframework.core; 018 019/** 020 * Internal helper class used to find the Java/JVM version that Spring is 021 * operating on, to allow for automatically adapting to the present platform's 022 * capabilities. 023 * 024 * <p>Note that Spring requires JVM 1.6 or higher, as of Spring 4.0. 025 * 026 * @author Rod Johnson 027 * @author Juergen Hoeller 028 * @author Rick Evans 029 * @author Sam Brannen 030 * @deprecated as of Spring 4.2.1, in favor of direct checks for the desired 031 * JDK API variants via reflection 032 */ 033@Deprecated 034public abstract class JdkVersion { 035 036 /** 037 * Constant identifying the 1.3.x JVM (JDK 1.3). 038 */ 039 public static final int JAVA_13 = 0; 040 041 /** 042 * Constant identifying the 1.4.x JVM (J2SE 1.4). 043 */ 044 public static final int JAVA_14 = 1; 045 046 /** 047 * Constant identifying the 1.5 JVM (Java 5). 048 */ 049 public static final int JAVA_15 = 2; 050 051 /** 052 * Constant identifying the 1.6 JVM (Java 6). 053 */ 054 public static final int JAVA_16 = 3; 055 056 /** 057 * Constant identifying the 1.7 JVM (Java 7). 058 */ 059 public static final int JAVA_17 = 4; 060 061 /** 062 * Constant identifying the 1.8 JVM (Java 8). 063 */ 064 public static final int JAVA_18 = 5; 065 066 /** 067 * Constant identifying the 1.9 JVM (Java 9). 068 */ 069 public static final int JAVA_19 = 6; 070 071 072 private static final String javaVersion; 073 074 private static final int majorJavaVersion; 075 076 static { 077 javaVersion = System.getProperty("java.version"); 078 // version String should look like "1.4.2_10" 079 if (javaVersion.contains("1.9.")) { 080 majorJavaVersion = JAVA_19; 081 } 082 else if (javaVersion.contains("1.8.")) { 083 majorJavaVersion = JAVA_18; 084 } 085 else if (javaVersion.contains("1.7.")) { 086 majorJavaVersion = JAVA_17; 087 } 088 else { 089 // else leave 1.6 as default (it's either 1.6 or unknown) 090 majorJavaVersion = JAVA_16; 091 } 092 } 093 094 095 /** 096 * Return the full Java version string, as returned by 097 * {@code System.getProperty("java.version")}. 098 * @return the full Java version string 099 * @see System#getProperty(String) 100 */ 101 public static String getJavaVersion() { 102 return javaVersion; 103 } 104 105 /** 106 * Get the major version code. This means we can do things like 107 * {@code if (getMajorJavaVersion() >= JAVA_17)}. 108 * @return a code comparable to the {@code JAVA_XX} codes in this class 109 * @see #JAVA_16 110 * @see #JAVA_17 111 * @see #JAVA_18 112 * @see #JAVA_19 113 */ 114 public static int getMajorJavaVersion() { 115 return majorJavaVersion; 116 } 117 118}