JdkVersion (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.core
Class JdkVersion

java.lang.Object
  org.springframework.core.JdkVersion

public abstract class JdkVersion
extends Object
extends Object

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.

Note that Spring requires JVM 1.4 or higher, as of Spring 2.1.

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.

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()
          Convenience method to determine if the current JVM is at least Java 1.4.

static boolean isAtLeastJava15()
          Convenience method to determine if the current JVM is at least Java 1.5 (Java 5).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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.

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()` Convenience method to determine if the current JVM is at least Java 1.4.
`static boolean`	`isAtLeastJava15()` Convenience method to determine if the current JVM is at least Java 1.5 (Java 5).

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.

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

public static boolean isAtLeastJava14()

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

public static boolean isAtLeastJava15()

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