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 system and Java version.
  Author:
    Karsten Lentzsch

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `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 resolution 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

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `SystemUtils()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `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.

      Defaults to `null`, if the runtime does not have security 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.

      Defaults to `null`, if the runtime does not have security 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.

      Defaults to `null`, if the runtime does not have security 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 resolution 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's no such value, or an empty String when a SecurityException has been caught

    - #### startsWith

          protected static boolean startsWith(String str,
                           String prefix)

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