Package org.openjdk.jmc.common.version
Class JavaVMVersionToolkit
- java.lang.Object
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- org.openjdk.jmc.common.version.JavaVMVersionToolkit
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public class JavaVMVersionToolkit extends java.lang.Object
A toolkit to handle JVM versions.
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Constructor Summary
Constructors Constructor Description JavaVMVersionToolkit()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static java.lang.String
decodeJavaVersion(java.lang.String vmVersion)
Since Sun decided not to have java.specification.version as a performance counter, we need to try to decode the specification version from the VM version.static boolean
isHotspotJVMName(java.lang.String vmName)
Returns whether this is a HotSpot JVM or not.static boolean
isJRockitJVMName(java.lang.String vmName)
Returns whether this is a JRockit JVM or not.private static boolean
isNumber(java.lang.String string)
static java.lang.String
parseJavaVersion(java.lang.String version)
Parses version string to find java version, such as 1.6.
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Method Detail
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decodeJavaVersion
public static java.lang.String decodeJavaVersion(java.lang.String vmVersion)
Since Sun decided not to have java.specification.version as a performance counter, we need to try to decode the specification version from the VM version.- Parameters:
vmVersion
- the full VM version.- Returns:
- the java specification version, or something close to it.
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parseJavaVersion
public static java.lang.String parseJavaVersion(java.lang.String version)
Parses version string to find java version, such as 1.6.- Parameters:
version
- A string that may contain a java version- Returns:
- Short java version, or null
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isNumber
private static boolean isNumber(java.lang.String string)
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isJRockitJVMName
public static boolean isJRockitJVMName(java.lang.String vmName)
Returns whether this is a JRockit JVM or not.- Parameters:
vmName
- the JVM name to check.- Returns:
- true of it is a JRockit, false if it isn't or if was not possible to tell.
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isHotspotJVMName
public static boolean isHotspotJVMName(java.lang.String vmName)
Returns whether this is a HotSpot JVM or not.- Parameters:
vmName
- the JVM name to check.- Returns:
- true if it is a HotSpot, false if it isn't or if was not possible to tell.
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