Package org.opensourcephysics.tools

Class JREFinder

java.lang.Object
org.opensourcephysics.tools.JREFinder
public class JREFinder extends Object
JREFinder finds Java JRE directories.
Version:
1.0
Author:
Douglas Brown

  • Method Details

    • getFinder

      public static JREFinder getFinder()
      Gets the singleton JREFinder.
      Returns:
      the JREFinder

    • isReady

      public static boolean isReady()

    • is32BitVM

      public boolean is32BitVM(String jrePath)
      Determines if a JRE path points to a 32-bit VM.
      Parameters:
      jrePath - the JRE path
      Returns:
      true if 32-bit

    • getJREs

      public TreeSet<File> getJREs(int vmBitness)
      Returns all public and private JREs of a given bitness (32 or 64). Windows: search in \Java typical 64-bit jdk: Program Files\Java\jdkX.X.X_XX\jre\bin\javaw.exe typical 64-bit jre: Program Files\Java\jreX.X.X_XX\bin\javaw.exe or Program Files\Java\jreX\bin\javaw.exe or Program Files\Java\jre-X\bin\javaw.exe typical 32-bit jre: as above, but in Program Files (x86)\Java\ OS X: search in: /JavaVirtualMachines typical: /System/Library/Java/JavaVirtualMachines/X.X.X.jdk/Contents/Home/bin/javaw.exe ?? Linux: search in: /jvm typical: /usr/lib/jvm/java-X-openjdk/jre/bin/javaw.exe or /usr/lib/jvm/java-X.X.X-openjdk/jre/bin/javaw.exe or /usr/lib/jvm/java-X-sun-X.X.X.XX/jre/bin/javaw.exe or /usr/lib/jvm/java-X.X.X-sun/jre/bin/javaw.exe
      Parameters:
      vmBitness - the bitness desired
      Returns:
      a Set of java JRE directory paths

    • getDefaultJRE

      public File getDefaultJRE(int vmBitness, String path, boolean searchAll)
      Finds the default JRE of a given bitness (32 or 64). A public JRE is returned if possible.
      Parameters:
      vmBitness - the bitness desired
      path - the first path to search for a JRE--if found, return as default
      searchAll - true to search paths other than the specified one
      Returns:
      the default JRE directory, or null if none found