## org.springframework.core
Class JdkVersion

    java.lang.Object
      org.springframework.core.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
`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).

Constructor Summary
`JdkVersion()`

Method Summary
`static String` `getJavaVersion()` Return the full Java version string, as returned by `System.getProperty("java.version")`.
`static int` `getMajorJavaVersion()` Get the major version code.
`static boolean` `isAtLeastJava14()` Deprecated. as of Spring 3.0 which requires Java 1.5+
`static boolean` `isAtLeastJava15()` Deprecated. as of Spring 3.0 which requires Java 1.5+
`static boolean` `isAtLeastJava16()` Deprecated. as of Spring 3.0, in favor of reflective checks for the specific Java 1.6 classes of interest

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

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

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_14)`.

  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`