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- All Implemented Interfaces:
public class JvmObject with utilities to gather information about the running JVM.
TODO Add JVM exception handler to add information on known exceptions. I.e: Classpath handler not registered with information on how to fix it (call
ClasspathHandler.registerHandler())
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Field Summary
Fields Modifier and Type Field Description private final TimeZonetimeZoneprivate final Charsetcharsetprivate final Localelocaleprivate final Stringhostnameprivate final Stringipprivate final Stringidprivate final Stringnameprivate final Stringversionprivate final IntegercpuCountprivate final Stringtimezoneprivate final StringlocaleCodepublic final static JvmINSTANCE
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Method Summary
Modifier and Type Method Description final StringinitialMemory()Amount of memory in kilobytes that the JVM initially requests from the operating system. final StringusedMemory()Amount of used memory in kilobytes. final Stringuptime()Uptime of the Java virtual machine in seconds. final <T extends Any> TsystemSettingOrNull(KClass<T> type, String name)Retrieve a setting by name by looking in the JVM system properties first and in OS environment variables if not found. final <T extends Any> TsystemSettingOrNull(String name)Utility method for retrieving a system setting, check systemSettingOrNull for details. final <T extends Any> TsystemSetting(KClass<T> type, String name)final <T extends Any> TsystemSetting(String name)final BooleansystemFlag(String name)Retrieve a flag (boolean parameter) by name by looking in the JVM system properties first and in OS environment variables if not found. final TimeZonegetTimeZone()Default timezone. final CharsetgetCharset()Default character set. final LocalegetLocale()Default locale for this instance of the Java Virtual Machine. final StringgetHostname()The hostname of the machine running this program. final StringgetIp()The IP address of the machine running this program. final StringgetId()ID representing the running Java virtual machine final StringgetName()Name of the JVM running this program. final StringgetVersion()Java version aka language level. final IntegergetCpuCount()Number of processors available to the Java virtual machine. final StringgetTimezone()User Time Zone property. final StringgetLocaleCode()User locale consist of 2-letter language code, 2-letter country code and file encoding. -
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Method Detail
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initialMemory
final String initialMemory()
Amount of memory in kilobytes that the JVM initially requests from the operating system.
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usedMemory
final String usedMemory()
Amount of used memory in kilobytes.
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systemSettingOrNull
final <T extends Any> T systemSettingOrNull(KClass<T> type, String name)
Retrieve a setting by name by looking in the JVM system properties first and in OS environment variables if not found.
- Parameters:
type- Type of the requested parameter.name- Name of the searched parameter, can not be blank.
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systemSettingOrNull
final <T extends Any> T systemSettingOrNull(String name)
Utility method for retrieving a system setting, check systemSettingOrNull for details.
- Parameters:
name- Name of the searched parameter, can not be blank.
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systemSetting
final <T extends Any> T systemSetting(String name)
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systemFlag
final Boolean systemFlag(String name)
Retrieve a flag (boolean parameter) by name by looking in the JVM system properties first and in OS environment variables if not found.
- Parameters:
name- Name of the searched parameter, can not be blank.
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getTimeZone
final TimeZone getTimeZone()
Default timezone. TODO Defining this lazily fails in macOS
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getCharset
final Charset getCharset()
Default character set.
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getHostname
final String getHostname()
The hostname of the machine running this program.
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getName
final String getName()
Name of the JVM running this program. For example: OpenJDK 64-Bit Server VM.
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getVersion
final String getVersion()
Java version aka language level. For example: 11
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getCpuCount
final Integer getCpuCount()
Number of processors available to the Java virtual machine.
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getTimezone
final String getTimezone()
User Time Zone property. Can be set with -Duser.timezone JVM argument.
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getLocaleCode
final String getLocaleCode()
User locale consist of 2-letter language code, 2-letter country code and file encoding.
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