org.springframework.core

Class JdkVersion


  • public abstract class JdkVersion
    extends Object
    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 1.5 or higher, as of Spring 3.0.

    Author:
    Rod Johnson, Juergen Hoeller, Rick Evans
    • Field Summary

      Fields  
      Modifier and Type Field and Description
      static int JAVA_13
      Constant identifying the 1.3.x JVM (JDK 1.3).
      static int JAVA_14
      Constant identifying the 1.4.x JVM (J2SE 1.4).
      static int JAVA_15
      Constant identifying the 1.5 JVM (Java 5).
      static int JAVA_16
      Constant identifying the 1.6 JVM (Java 6).
      static int JAVA_17
      Constant identifying the 1.7 JVM (Java 7).
      static int JAVA_18
      Constant identifying the 1.8 JVM (Java 8).
    • Constructor Summary

      Constructors  
      Constructor and Description
      JdkVersion() 
    • Field Detail

      • JAVA_13

        public static final int JAVA_13
        Constant identifying the 1.3.x JVM (JDK 1.3).
        See Also:
        Constant Field Values
      • JAVA_14

        public static final int JAVA_14
        Constant identifying the 1.4.x JVM (J2SE 1.4).
        See Also:
        Constant Field Values
      • JAVA_15

        public static final int JAVA_15
        Constant identifying the 1.5 JVM (Java 5).
        See Also:
        Constant Field Values
      • JAVA_16

        public static final int JAVA_16
        Constant identifying the 1.6 JVM (Java 6).
        See Also:
        Constant Field Values
      • JAVA_17

        public static final int JAVA_17
        Constant identifying the 1.7 JVM (Java 7).
        See Also:
        Constant Field Values
      • JAVA_18

        public static final int JAVA_18
        Constant identifying the 1.8 JVM (Java 8).
        See Also:
        Constant Field Values
    • Constructor Detail

      • JdkVersion

        public JdkVersion()
    • Method Detail

      • getJavaVersion

        public static String getJavaVersion()
        Return the full Java version string, as returned by System.getProperty("java.version").
        Returns:
        the full Java version string
        See Also:
        System.getProperty(String)
      • getMajorJavaVersion

        public static int getMajorJavaVersion()
        Get the major version code. This means we can do things like if (getMajorJavaVersion() >= JAVA_17).
        Returns:
        a code comparable to the JAVA_XX codes in this class
        See Also:
        JAVA_13, JAVA_14, JAVA_15, JAVA_16, JAVA_17
      • isAtLeastJava14

        @Deprecated
        public static boolean isAtLeastJava14()
        Deprecated.  as of Spring 3.0 which requires Java 1.5+
        Convenience method to determine if the current JVM is at least Java 1.4.
        Returns:
        true if the current JVM is at least Java 1.4
        See Also:
        getMajorJavaVersion(), JAVA_14, JAVA_15, JAVA_16, JAVA_17
      • isAtLeastJava15

        @Deprecated
        public static boolean isAtLeastJava15()
        Deprecated.  as of Spring 3.0 which requires Java 1.5+
        Convenience method to determine if the current JVM is at least Java 1.5 (Java 5).
        Returns:
        true if the current JVM is at least Java 1.5
        See Also:
        getMajorJavaVersion(), JAVA_15, JAVA_16, JAVA_17
      • isAtLeastJava16

        @Deprecated
        public static boolean isAtLeastJava16()
        Deprecated.  as of Spring 3.0, in favor of reflective checks for the specific Java 1.6 classes of interest
        Convenience method to determine if the current JVM is at least Java 1.6 (Java 6).
        Returns:
        true if the current JVM is at least Java 1.6
        See Also:
        getMajorJavaVersion(), JAVA_16, JAVA_17