Package org.apache.lucene.util

Class Constants

java.lang.Object

org.apache.lucene.util.Constants

public final class Constants
extends Object

Some useful constants.

Field Summary

Fields

Modifier and Type	Field	Description
static boolean	FREE_BSD	True iff running on FreeBSD
static String	JAVA_VENDOR	The value of System.getProperty("java.vendor").
static String	JAVA_VERSION	Deprecated. To detect Java versions use Runtime.version()
static boolean	JRE_IS_64BIT	True iff running on a 64bit JVM
static boolean	JRE_IS_MINIMUM_JAVA11	Deprecated. This constant is useless and always true.
static boolean	JRE_IS_MINIMUM_JAVA8	Deprecated. This constant is useless and always true.
static boolean	JRE_IS_MINIMUM_JAVA9	Deprecated. This constant is useless and always true.
static String	JVM_NAME	JVM vendor name.
static String	JVM_SPEC_VERSION	Deprecated. To detect Java versions use Runtime.version()
static String	JVM_VENDOR	JVM vendor info.
static String	JVM_VERSION	Deprecated. To detect Java versions use Runtime.version()
static boolean	LINUX	True iff running on Linux.
static boolean	MAC_OS_X	True iff running on Mac OS X
static String	OS_ARCH	The value of System.getProperty("os.arch").
static String	OS_NAME	The value of System.getProperty("os.name").
static String	OS_VERSION	The value of System.getProperty("os.version").
static boolean	SUN_OS	True iff running on SunOS.
static boolean	WINDOWS	True iff running on Windows.

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

JVM_VENDOR

public static final String JVM_VENDOR

JVM vendor info.

JVM_NAME

public static final String JVM_NAME

JVM vendor name.

JVM_VERSION

@Deprecated
public static final String JVM_VERSION

Deprecated.

To detect Java versions use Runtime.version()

Get the full version string of the current runtime.

JVM_SPEC_VERSION

@Deprecated
public static final String JVM_SPEC_VERSION

Deprecated.

To detect Java versions use Runtime.version()

Gets the specification version of the current runtime. This is the feature version converted to String.

See Also:

Runtime.Version.feature()

JAVA_VERSION

@Deprecated
public static final String JAVA_VERSION

Deprecated.

To detect Java versions use Runtime.version()

The value of System.getProperty("java.version").

OS_NAME

public static final String OS_NAME

The value of System.getProperty("os.name"). *

LINUX

public static final boolean LINUX

True iff running on Linux.

WINDOWS

public static final boolean WINDOWS

True iff running on Windows.

SUN_OS

public static final boolean SUN_OS

True iff running on SunOS.

MAC_OS_X

public static final boolean MAC_OS_X

True iff running on Mac OS X

FREE_BSD

public static final boolean FREE_BSD

True iff running on FreeBSD

OS_ARCH

public static final String OS_ARCH

The value of System.getProperty("os.arch").

OS_VERSION

public static final String OS_VERSION

The value of System.getProperty("os.version").

JAVA_VENDOR

public static final String JAVA_VENDOR

The value of System.getProperty("java.vendor").

JRE_IS_64BIT

public static final boolean JRE_IS_64BIT

True iff running on a 64bit JVM

JRE_IS_MINIMUM_JAVA8

@Deprecated
public static final boolean JRE_IS_MINIMUM_JAVA8

Deprecated.

This constant is useless and always true. To detect Java versions use Runtime.version()

Always true.

See Also:

Constant Field Values

JRE_IS_MINIMUM_JAVA9

@Deprecated
public static final boolean JRE_IS_MINIMUM_JAVA9

Deprecated.

This constant is useless and always true. To detect Java versions use Runtime.version()

Always true.

See Also:

Constant Field Values

JRE_IS_MINIMUM_JAVA11

@Deprecated
public static final boolean JRE_IS_MINIMUM_JAVA11

Deprecated.

This constant is useless and always true. To detect Java versions use Runtime.version()

Always true.

See Also:

Constant Field Values