Package com.google.common.base

Enum StandardSystemProperty

java.lang.Object

java.lang.Enum<StandardSystemProperty>

com.google.common.base.StandardSystemProperty

All Implemented Interfaces:

Serializable, Comparable<StandardSystemProperty>

@GwtIncompatible
public enum StandardSystemProperty
extends Enum<StandardSystemProperty>

Represents a standard system property.

Since:

15.0

Author:

Kurt Alfred Kluever

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.

Method Summary

Modifier and Type	Method	Description
String	key()	Returns the key used to look up this system property.
String	toString()	Returns a string representation of this system property.
@Nullable String	value()	Returns the current value for this system property by delegating to System.getProperty(String).
static StandardSystemProperty	valueOf(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.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

JAVA_VERSION

public static final StandardSystemProperty JAVA_VERSION

Java Runtime Environment version.

JAVA_VENDOR

public static final StandardSystemProperty JAVA_VENDOR

Java Runtime Environment vendor.

JAVA_VENDOR_URL

public static final StandardSystemProperty JAVA_VENDOR_URL

Java vendor URL.

JAVA_HOME

public static final StandardSystemProperty JAVA_HOME

Java installation directory.

JAVA_VM_SPECIFICATION_VERSION

public static final StandardSystemProperty JAVA_VM_SPECIFICATION_VERSION

Java Virtual Machine specification version.

JAVA_VM_SPECIFICATION_VENDOR

public static final StandardSystemProperty JAVA_VM_SPECIFICATION_VENDOR

Java Virtual Machine specification vendor.

JAVA_VM_SPECIFICATION_NAME

public static final StandardSystemProperty JAVA_VM_SPECIFICATION_NAME

Java Virtual Machine specification name.

JAVA_VM_VERSION

public static final StandardSystemProperty JAVA_VM_VERSION

Java Virtual Machine implementation version.

JAVA_VM_VENDOR

public static final StandardSystemProperty JAVA_VM_VENDOR

Java Virtual Machine implementation vendor.

JAVA_VM_NAME

public static final StandardSystemProperty JAVA_VM_NAME

Java Virtual Machine implementation name.

JAVA_SPECIFICATION_VERSION

public static final StandardSystemProperty JAVA_SPECIFICATION_VERSION

Java Runtime Environment specification version.

JAVA_SPECIFICATION_VENDOR

public static final StandardSystemProperty JAVA_SPECIFICATION_VENDOR

Java Runtime Environment specification vendor.

JAVA_SPECIFICATION_NAME

public static final StandardSystemProperty JAVA_SPECIFICATION_NAME

Java Runtime Environment specification name.

JAVA_CLASS_VERSION

public static final StandardSystemProperty JAVA_CLASS_VERSION

Java class format version number.

JAVA_CLASS_PATH

public static final StandardSystemProperty JAVA_CLASS_PATH

Java class path.

JAVA_LIBRARY_PATH

public static final StandardSystemProperty JAVA_LIBRARY_PATH

List of paths to search when loading libraries.

JAVA_IO_TMPDIR

public static final StandardSystemProperty JAVA_IO_TMPDIR

Default temp file path.

JAVA_COMPILER

public static final StandardSystemProperty JAVA_COMPILER

Name of JIT compiler to use.

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.

OS_NAME

public static final StandardSystemProperty OS_NAME

Operating system name.

OS_ARCH

public static final StandardSystemProperty OS_ARCH

Operating system architecture.

OS_VERSION

public static final StandardSystemProperty OS_VERSION

Operating system version.

FILE_SEPARATOR

public static final StandardSystemProperty FILE_SEPARATOR

File separator ("/" on UNIX).

PATH_SEPARATOR

public static final StandardSystemProperty PATH_SEPARATOR

Path separator (":" on UNIX).

LINE_SEPARATOR

public static final StandardSystemProperty LINE_SEPARATOR

Line separator ("\n" on UNIX).

USER_NAME

public static final StandardSystemProperty USER_NAME

User's account name.

USER_HOME

public static final StandardSystemProperty USER_HOME

User's home directory.

USER_DIR

public static final StandardSystemProperty USER_DIR

User's current working directory.

Method Detail

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

valueOf

public static StandardSystemProperty valueOf(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:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

key

public String key()

Returns the key used to look up this system property.

value

public @Nullable String value()

Returns the current value for this system property by delegating to System.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)

toString

public String toString()

Returns a string representation of this system property.

Overrides:

toString in class Enum<StandardSystemProperty>