Package com.google.common.base
Enum StandardSystemProperty
- java.lang.Object
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- java.lang.Enum<StandardSystemProperty>
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- com.google.common.base.StandardSystemProperty
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Comparable<StandardSystemProperty>
@GwtIncompatible public enum StandardSystemProperty extends java.lang.Enum<StandardSystemProperty>
Represents a standard system property.- Since:
- 15.0
- Author:
- Kurt Alfred Kluever
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Enum Constant Summary
Enum Constants Enum Constant Description FILE_SEPARATOR
File separator ("/" on UNIX).JAVA_CLASS_PATH
Java class path.JAVA_CLASS_VERSION
Java class format version number.JAVA_COMPILER
Name of JIT compiler to use.JAVA_EXT_DIRS
Deprecated.This property was deprecated in Java 8 and removed in Java 9.JAVA_HOME
Java installation directory.JAVA_IO_TMPDIR
Default temp file path.JAVA_LIBRARY_PATH
List of paths to search when loading libraries.JAVA_SPECIFICATION_NAME
Java Runtime Environment specification name.JAVA_SPECIFICATION_VENDOR
Java Runtime Environment specification vendor.JAVA_SPECIFICATION_VERSION
Java Runtime Environment specification version.JAVA_VENDOR
Java Runtime Environment vendor.JAVA_VENDOR_URL
Java vendor URL.JAVA_VERSION
Java Runtime Environment version.JAVA_VM_NAME
Java Virtual Machine implementation name.JAVA_VM_SPECIFICATION_NAME
Java Virtual Machine specification name.JAVA_VM_SPECIFICATION_VENDOR
Java Virtual Machine specification vendor.JAVA_VM_SPECIFICATION_VERSION
Java Virtual Machine specification version.JAVA_VM_VENDOR
Java Virtual Machine implementation vendor.JAVA_VM_VERSION
Java Virtual Machine implementation version.LINE_SEPARATOR
Line separator ("\n" on UNIX).OS_ARCH
Operating system architecture.OS_NAME
Operating system name.OS_VERSION
Operating system version.PATH_SEPARATOR
Path separator (":" on UNIX).USER_DIR
User's current working directory.USER_HOME
User's home directory.USER_NAME
User's account name.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String
key()
Returns the key used to look up this system property.java.lang.String
toString()
Returns a string representation of this system property.java.lang.String
value()
Returns the current value for this system property by delegating toSystem.getProperty(String)
.static StandardSystemProperty
valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name.static StandardSystemProperty[]
values()
Returns an array containing the constants of this enum type, in the order they are declared.
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Enum Constant Detail
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JAVA_VERSION
public static final StandardSystemProperty JAVA_VERSION
Java Runtime Environment version.
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JAVA_VENDOR
public static final StandardSystemProperty JAVA_VENDOR
Java Runtime Environment vendor.
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JAVA_VENDOR_URL
public static final StandardSystemProperty JAVA_VENDOR_URL
Java vendor URL.
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JAVA_HOME
public static final StandardSystemProperty JAVA_HOME
Java installation directory.
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JAVA_VM_SPECIFICATION_VERSION
public static final StandardSystemProperty JAVA_VM_SPECIFICATION_VERSION
Java Virtual Machine specification version.
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JAVA_VM_SPECIFICATION_VENDOR
public static final StandardSystemProperty JAVA_VM_SPECIFICATION_VENDOR
Java Virtual Machine specification vendor.
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JAVA_VM_SPECIFICATION_NAME
public static final StandardSystemProperty JAVA_VM_SPECIFICATION_NAME
Java Virtual Machine specification name.
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JAVA_VM_VERSION
public static final StandardSystemProperty JAVA_VM_VERSION
Java Virtual Machine implementation version.
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JAVA_VM_VENDOR
public static final StandardSystemProperty JAVA_VM_VENDOR
Java Virtual Machine implementation vendor.
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JAVA_VM_NAME
public static final StandardSystemProperty JAVA_VM_NAME
Java Virtual Machine implementation name.
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JAVA_SPECIFICATION_VERSION
public static final StandardSystemProperty JAVA_SPECIFICATION_VERSION
Java Runtime Environment specification version.
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JAVA_SPECIFICATION_VENDOR
public static final StandardSystemProperty JAVA_SPECIFICATION_VENDOR
Java Runtime Environment specification vendor.
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JAVA_SPECIFICATION_NAME
public static final StandardSystemProperty JAVA_SPECIFICATION_NAME
Java Runtime Environment specification name.
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JAVA_CLASS_VERSION
public static final StandardSystemProperty JAVA_CLASS_VERSION
Java class format version number.
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JAVA_CLASS_PATH
public static final StandardSystemProperty JAVA_CLASS_PATH
Java class path.
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JAVA_LIBRARY_PATH
public static final StandardSystemProperty JAVA_LIBRARY_PATH
List of paths to search when loading libraries.
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JAVA_IO_TMPDIR
public static final StandardSystemProperty JAVA_IO_TMPDIR
Default temp file path.
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JAVA_COMPILER
public static final StandardSystemProperty JAVA_COMPILER
Name of JIT compiler to use.
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JAVA_EXT_DIRS
@Deprecated public static final StandardSystemProperty JAVA_EXT_DIRS
Deprecated.This property was deprecated in Java 8 and removed in Java 9. We do not plan to remove this API from Guava, but if you are using it, it is probably not doing what you want.Path of extension directory or directories.
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OS_NAME
public static final StandardSystemProperty OS_NAME
Operating system name.
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OS_ARCH
public static final StandardSystemProperty OS_ARCH
Operating system architecture.
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OS_VERSION
public static final StandardSystemProperty OS_VERSION
Operating system version.
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FILE_SEPARATOR
public static final StandardSystemProperty FILE_SEPARATOR
File separator ("/" on UNIX).
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PATH_SEPARATOR
public static final StandardSystemProperty PATH_SEPARATOR
Path separator (":" on UNIX).
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LINE_SEPARATOR
public static final StandardSystemProperty LINE_SEPARATOR
Line separator ("\n" on UNIX).
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USER_NAME
public static final StandardSystemProperty USER_NAME
User's account name.
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USER_HOME
public static final StandardSystemProperty USER_HOME
User's home directory.
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USER_DIR
public static final StandardSystemProperty USER_DIR
User's current working directory.
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Method Detail
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values
public static StandardSystemProperty[] values()
Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:for (StandardSystemProperty c : StandardSystemProperty.values()) System.out.println(c);
- Returns:
- an array containing the constants of this enum type, in the order they are declared
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valueOf
public static StandardSystemProperty valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)- Parameters:
name
- the name of the enum constant to be returned.- Returns:
- the enum constant with the specified name
- Throws:
java.lang.IllegalArgumentException
- if this enum type has no constant with the specified namejava.lang.NullPointerException
- if the argument is null
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key
public java.lang.String key()
Returns the key used to look up this system property.
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value
@CheckForNull public java.lang.String value()
Returns the current value for this system property by delegating toSystem.getProperty(String)
.The value returned by this method is non-null except in rare circumstances:
JAVA_EXT_DIRS
was deprecated in Java 8 and removed in Java 9. We have not confirmed whether it is available under older versions.JAVA_COMPILER
, while still listed as required as of Java 15, is typically not available even under older version.- Any property may be cleared through APIs like
System.clearProperty(java.lang.String)
. - Unusual environments like GWT may have their own special handling of system properties.
Note that
StandardSystemProperty
does not provide constants for more recently added properties, including:java.vendor.version
(added in Java 11, listed as optional as of Java 13)jdk.module.*
(added in Java 9, optional)
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toString
public java.lang.String toString()
Returns a string representation of this system property.- Overrides:
toString
in classjava.lang.Enum<StandardSystemProperty>
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