com.jgoodies.common.base
Class SystemUtils

java.lang.Object
  com.jgoodies.common.base.SystemUtils

public class SystemUtils
extends Object

Provides convenience behavior to determine the operating syste and Java version.

Version:

$Revision: 1.5 $

Author:

Karsten Lentzsch

Field Summary

static boolean	HAS_MODERN_RASTERIZER True since Java 6 update 10.
static boolean	IS_JAVA_6 True if this is Java 6.
static boolean	IS_JAVA_7 True if this is Java 7.
static boolean	IS_JAVA_7_OR_LATER True if this is Java 7.x or later.
static boolean	IS_JAVA_8 True if this is Java 7.
static boolean	IS_JAVA_8_OR_LATER True if this is Java 8.x or later.
static boolean	IS_LAF_WINDOWS_XP_ENABLED True if the Windows XP Look&Feel is enabled.
static boolean	IS_LOW_RESOLUTION Is true if this environment's default toolkit reports a screen resolutio below 120 dpi.
static boolean	IS_OS_LINUX Is true if this is Linux.
static boolean	IS_OS_MAC True if this is the Mac OS.
static boolean	IS_OS_SOLARIS True if this is Solaris.
static boolean	IS_OS_WINDOWS True if this is Windows.
static boolean	IS_OS_WINDOWS_2000 True if this is Windows 2000.
static boolean	IS_OS_WINDOWS_6_OR_LATER True if this is Windows Vista/Server 2008/7/2008 R2/8.
static boolean	IS_OS_WINDOWS_7 True if this is Windows 7.
static boolean	IS_OS_WINDOWS_8 True if this is Windows 8.
static boolean	IS_OS_WINDOWS_98 True if this is Windows 98.
static boolean	IS_OS_WINDOWS_ME True if this is Windows ME.
static boolean	IS_OS_WINDOWS_VISTA True if this is Windows Vista or Server 2008.
static boolean	IS_OS_WINDOWS_XP True if this is Windows XP.
protected static String	JAVA_VERSION The os.name System Property.
protected static String	OS_NAME The os.name System Property.
protected static String	OS_VERSION The os.version System Property.

Constructor Summary

protected

SystemUtils()

Method Summary

protected static String	getSystemProperty(String key) Tries to look up the System property for the given key.
protected static boolean	startsWith(String str, String prefix)

Methods inherited from class java.lang.Object

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

Field Detail

OS_NAME

protected static final String OS_NAME

The os.name System Property. Operating system name.

null, if the runtime does not have securit access to read this property or the property does not exist.

OS_VERSION

protected static final String OS_VERSION

The os.version System Property. Operating system version.

null, if the runtime does not have securit access to read this property or the property does not exist.

JAVA_VERSION

protected static final String JAVA_VERSION

The os.name System Property. Operating system name.

null, if the runtime does not have securit access to read this property or the property does not exist.

IS_OS_LINUX

public static final boolean IS_OS_LINUX

Is true if this is Linux.

IS_OS_MAC

public static final boolean IS_OS_MAC

True if this is the Mac OS.

IS_OS_SOLARIS

public static final boolean IS_OS_SOLARIS

True if this is Solaris.

IS_OS_WINDOWS

public static final boolean IS_OS_WINDOWS

True if this is Windows.

IS_OS_WINDOWS_98

public static final boolean IS_OS_WINDOWS_98

True if this is Windows 98.

IS_OS_WINDOWS_ME

public static final boolean IS_OS_WINDOWS_ME

True if this is Windows ME.

IS_OS_WINDOWS_2000

public static final boolean IS_OS_WINDOWS_2000

True if this is Windows 2000.

IS_OS_WINDOWS_XP

public static final boolean IS_OS_WINDOWS_XP

True if this is Windows XP.

IS_OS_WINDOWS_VISTA

public static final boolean IS_OS_WINDOWS_VISTA

True if this is Windows Vista or Server 2008.

IS_OS_WINDOWS_7

public static final boolean IS_OS_WINDOWS_7

True if this is Windows 7.

IS_OS_WINDOWS_8

public static final boolean IS_OS_WINDOWS_8

True if this is Windows 8.

IS_OS_WINDOWS_6_OR_LATER

public static final boolean IS_OS_WINDOWS_6_OR_LATER

True if this is Windows Vista/Server 2008/7/2008 R2/8.

IS_JAVA_6

public static final boolean IS_JAVA_6

True if this is Java 6. We check for a prefix of 1.6.

IS_JAVA_7

public static final boolean IS_JAVA_7

True if this is Java 7. We check for a prefix of 1.7.

IS_JAVA_7_OR_LATER

public static final boolean IS_JAVA_7_OR_LATER

True if this is Java 7.x or later. We check that it's not 1.6.

IS_JAVA_8

public static final boolean IS_JAVA_8

True if this is Java 7. We check for a prefix of 1.7.

Since:

1.6

IS_JAVA_8_OR_LATER

public static final boolean IS_JAVA_8_OR_LATER

True if this is Java 8.x or later We check that it's neither 1.6 nor 1.7.

Since:

1.6

HAS_MODERN_RASTERIZER

public static final boolean HAS_MODERN_RASTERIZER

True since Java 6 update 10.

Since:

1.2

IS_LAF_WINDOWS_XP_ENABLED

public static final boolean IS_LAF_WINDOWS_XP_ENABLED

True if the Windows XP Look&Feel is enabled.

Since:

1.2

IS_LOW_RESOLUTION

public static final boolean IS_LOW_RESOLUTION

Is true if this environment's default toolkit reports a screen resolutio below 120 dpi.

Since:

1.2

Constructor Detail

SystemUtils

protected SystemUtils()

Method Detail

getSystemProperty

protected static String getSystemProperty(String key)

Tries to look up the System property for the given key In untrusted environments this may throw a SecurityException In this case we catch the exception and answer an empty string.

Parameters:

key - the name of the system property

Returns:

the system property's String value, or null if there' no such value, or an empty String whe a SecurityException has been caught

startsWith

protected static boolean startsWith(String str,
                                    String prefix)