Package org.apache.commons.text.lookup
Class JavaPlatformStringLookup
java.lang.Object
org.apache.commons.text.lookup.AbstractStringLookup
org.apache.commons.text.lookup.JavaPlatformStringLookup
- All Implemented Interfaces:
StringLookup
Looks up keys related to Java: Java version, JRE version, VM version, and so on.
The lookup keys with examples are:
- version: "Java version 1.8.0_181"
- runtime: "Java(TM) SE Runtime Environment (build 1.8.0_181-b13) from Oracle Corporation"
- vm: "Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)"
- os: "Windows 10 10.0, architecture: amd64-64"
- hardware: "processors: 4, architecture: amd64-64, instruction sets: amd64"
- locale: "default locale: en_US, platform encoding: iso-8859-1"
Using a StringLookup
from the StringLookupFactory
:
StringLookupFactory.INSTANCE.javaPlatformStringLookup().lookup("version");
Using a StringSubstitutor
:
StringSubstitutor.createInterpolator().replace("... ${java:version} ..."));
The above examples convert "version"
to the current VM version, for example,
"Java version 1.8.0_181"
.
- Since:
- 1.3
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Field Summary
FieldsModifier and TypeFieldDescription(package private) static final JavaPlatformStringLookup
Defines the singleton for this class.private static final String
hardware
key for drivinglookup(String)
.private static final String
locale
key for drivinglookup(String)
.private static final String
os
key for drivinglookup(String)
.private static final String
runtime
key for drivinglookup(String)
.private static final String
version
key for drivinglookup(String)
.private static final String
vm
key for drivinglookup(String)
.Fields inherited from class org.apache.commons.text.lookup.AbstractStringLookup
SPLIT_CH, SPLIT_STR
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Constructor Summary
ConstructorsModifierConstructorDescriptionprivate
No need to build instances for now. -
Method Summary
Modifier and TypeMethodDescription(package private) String
Accessible through the Lookup keyhardware
.(package private) String
Accessible through the Lookup keylocale
.(package private) String
Accessible through the Lookup keyos
.(package private) String
Accessible through the Lookup keyruntime
.private String
getSystemProperty
(String name) Gets the given system property.private String
getSystemProperty
(String prefix, String name) Gets the given system property.(package private) String
Accessible through the Lookup keyvm
.Looks up the value of the Java platform key.static void
The main method for running the JavaPlatformStringLookup.Methods inherited from class org.apache.commons.text.lookup.AbstractStringLookup
substringAfter, substringAfter, substringAfterLast, toLookupKey, toLookupKey
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Field Details
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INSTANCE
Defines the singleton for this class. -
KEY_HARDWARE
hardware
key for drivinglookup(String)
.- See Also:
-
KEY_LOCALE
locale
key for drivinglookup(String)
.- See Also:
-
KEY_OS
os
key for drivinglookup(String)
.- See Also:
-
KEY_RUNTIME
runtime
key for drivinglookup(String)
.- See Also:
-
KEY_VERSION
version
key for drivinglookup(String)
.- See Also:
-
KEY_VM
vm
key for drivinglookup(String)
.- See Also:
-
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Constructor Details
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JavaPlatformStringLookup
private JavaPlatformStringLookup()No need to build instances for now.
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Method Details
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main
The main method for running the JavaPlatformStringLookup.- Parameters:
args
- the standard java main method parameter which is unused for our running of this class.
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getHardware
String getHardware()Accessible through the Lookup keyhardware
.- Returns:
- hardware processor information.
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getLocale
String getLocale()Accessible through the Lookup keylocale
.- Returns:
- system locale and file encoding information.
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getOperatingSystem
String getOperatingSystem()Accessible through the Lookup keyos
.- Returns:
- operating system information.
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getRuntime
String getRuntime()Accessible through the Lookup keyruntime
.- Returns:
- Java Runtime Environment information.
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getSystemProperty
Gets the given system property.- Parameters:
name
- a system property name.- Returns:
- a system property value.
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getSystemProperty
Gets the given system property.- Parameters:
prefix
- the prefix to use for the result stringname
- a system property name.- Returns:
- The prefix + a system property value.
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getVirtualMachine
String getVirtualMachine()Accessible through the Lookup keyvm
.- Returns:
- Java Virtual Machine information.
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lookup
Looks up the value of the Java platform key.The lookup keys with examples are:
- version: "Java version 1.8.0_181"
- runtime: "Java(TM) SE Runtime Environment (build 1.8.0_181-b13) from Oracle Corporation"
- vm: "Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)"
- os: "Windows 10 10.0, architecture: amd64-64"
- hardware: "processors: 4, architecture: amd64-64, instruction sets: amd64"
- locale: "default locale: en_US, platform encoding: iso-8859-1"
- Parameters:
key
- the key to be looked up, may be null- Returns:
- The value of the environment variable.
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