Package com.bric.multislider

Class Jvm

java.lang.Object
com.bric.multislider.Jvm
public class Jvm extends Object
Static methods relating to the JVM environment.

Instead of burying a constant like "isQuartz" in its most relevant class (such as OptimizedGraphics2D), it should be stored here so if other classes need to access it they don't necessary have to

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final boolean
    isLinux
    Whether this session is on a Linux machine.
    static final boolean
    isMac
    Whether this session is on a Mac.
    static final boolean
    isVista
    Whether this session is on Vista.
    static final boolean
    isVistaOrWindows7
    Whether this session is on Windows Vista or Windows 7.
    static final boolean
    isWindows
    Whether this session is on Windows.
    static final boolean
    isWindows7
    Whether this session is on Windows 7.
    static final boolean
    isWindowsXP
    Whether this session is on Windows XP.
    static final float
    javaVersion
    The major Java version being used (1.4, 1.5, 1.6, etc.), or -1 if this value couldn't be correctly determined.
    static final boolean
    usingQuartz
    If on a Mac: whether Quartz is the rendering pipeline.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Jvm()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static float
    getMajorJavaVersion()
    This converts the system property "java.version" to a float value.
    static float
    getMajorJavaVersion(boolean catchSecurityException)
     
    static String
    getProfile()
    Gets basic information about this session's JVM: the OS name & version, the Java version, and (on Mac) whether Quartz is being used.
    static void
    printProfile()
    Prints basic information about this session's JVM: the OS name & version, the Java version, and (on Mac) whether Quartz is being used.

    Methods inherited from class java.lang.Object

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

  • Field Details

    • javaVersion

      public static final float javaVersion
      The major Java version being used (1.4, 1.5, 1.6, etc.), or -1 if this value couldn't be correctly determined.

    • isMac

      public static final boolean isMac
      Whether this session is on a Mac.

    • isLinux

      public static final boolean isLinux
      Whether this session is on a Linux machine.

    • isWindows

      public static final boolean isWindows
      Whether this session is on Windows.

    • isVista

      public static final boolean isVista
      Whether this session is on Vista.

    • isWindows7

      public static final boolean isWindows7
      Whether this session is on Windows 7.

    • isWindowsXP

      public static final boolean isWindowsXP
      Whether this session is on Windows XP.

    • isVistaOrWindows7

      public static final boolean isVistaOrWindows7
      Whether this session is on Windows Vista or Windows 7.

    • usingQuartz

      public static final boolean usingQuartz
      If on a Mac: whether Quartz is the rendering pipeline. In applets this may throw a security exception; if this cannot be ascertained we assume it is false.

  • Constructor Details

    • Jvm

      public Jvm()

  • Method Details

    • printProfile

      public static void printProfile()
      Prints basic information about this session's JVM: the OS name & version, the Java version, and (on Mac) whether Quartz is being used.

    • getProfile

      public static String getProfile()
      Gets basic information about this session's JVM: the OS name & version, the Java version, and (on Mac) whether Quartz is being used.
      Returns:
      profile

    • getMajorJavaVersion

      public static float getMajorJavaVersion() throws AccessControlException
      This converts the system property "java.version" to a float value. This drops rightmost digits until a legitimate float can be parsed.
      For example, this converts "1.6.0_05" to "1.6".
      This value is cached as the system property "java.major.version". Although technically this value is a String, it will always be parseable as a float.
      Returns:
      major java version such as 1.6
      Throws:
      AccessControlException - this may be thrown in unsigned applets! Beware!

    • getMajorJavaVersion

      public static float getMajorJavaVersion(boolean catchSecurityException)
      Parameters:
      catchSecurityException - if true and an exception occurs, then -1 is returned.
      Returns:
      the major java version, or -1 if this can't be determined/