org.jboss.util.platform

Class Java

java.lang.Object

org.jboss.util.platform.Java

public final class Java
extends java.lang.Object

Provides common access to specifics about the version of Java that a virtual machine supports.

Determines the version of the Java Virtual Machine by checking for the availablity of version specific classes.

Classes are loaded in the following order:

1. java.lang.Void was introduced in JDK 1.1
2. java.lang.ThreadLocal was introduced in JDK 1.2
3. java.lang.StrictMath was introduced in JDK 1.3
4. java.lang.StackTraceElement was introduced in JDK 1.4
5. java.lang.Enum was introduced in JDK 1.5
6. java.lang.management.LockInfo was introduced in JDK 1.6

Version:

$Revision$

Field Summary

Fields

Modifier and Type	Field and Description
private static int	VERSION Private to avoid over optimization by the compiler.
static int	VERSION_1_0 Java version 1.0 token
static int	VERSION_1_1 Java version 1.1 token
static int	VERSION_1_2 Java version 1.2 token
static int	VERSION_1_3 Java version 1.3 token
static int	VERSION_1_4 Java version 1.4 token
static int	VERSION_1_5 Java version 1.5 token
static int	VERSION_1_6 Java version 1.6 token

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Java() Prevent instantiation

Method Summary

Modifier and Type	Method and Description
static int	getVersion() Return the version of Java supported by the VM.
static boolean	isCompatible(int version) Returns true if the current virtual machine is compatible with the given version identifer.
static boolean	isVersion(int version) Returns true if the given version identifer is equal to the version identifier of the current virtuial machine.

Methods inherited from class java.lang.Object

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

Field Detail

VERSION_1_0

public static final int VERSION_1_0

Java version 1.0 token

See Also:

Constant Field Values

VERSION_1_1

public static final int VERSION_1_1

Java version 1.1 token

See Also:

Constant Field Values

VERSION_1_2

public static final int VERSION_1_2

Java version 1.2 token

See Also:

Constant Field Values

VERSION_1_3

public static final int VERSION_1_3

Java version 1.3 token

See Also:

Constant Field Values

VERSION_1_4

public static final int VERSION_1_4

Java version 1.4 token

See Also:

Constant Field Values

VERSION_1_5

public static final int VERSION_1_5

Java version 1.5 token

See Also:

Constant Field Values

VERSION_1_6

public static final int VERSION_1_6

Java version 1.6 token

See Also:

Constant Field Values

VERSION

private static final int VERSION

Private to avoid over optimization by the compiler.

See Also:

Use this method to access this final value.

Constructor Detail

Java

private Java()

Prevent instantiation

Method Detail

getVersion

public static int getVersion()

Return the version of Java supported by the VM.

Returns:

The version of Java supported by the VM.

isVersion

public static boolean isVersion(int version)

Returns true if the given version identifer is equal to the version identifier of the current virtuial machine.

Parameters:

version - The version identifier to check for.

Returns:

True if the current virtual machine is the same version.

isCompatible

public static boolean isCompatible(int version)

Returns true if the current virtual machine is compatible with the given version identifer.

Parameters:

version - The version identifier to check compatibility of.

Returns:

True if the current virtual machine is compatible.