Package org.opensourcephysics.tools

Class JREFinder

java.lang.Object

org.opensourcephysics.tools.JREFinder

public class JREFinder
extends java.lang.Object

JREFinder finds Java JRE directories.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	JREFinder.JavaFilter	JavaFilter class identifies acceptable java executable files.

Field Summary

Fields

Modifier and Type	Field	Description
static JREFinder.JavaFilter	JAVA_FILTER

Method Summary

Modifier and Type	Method	Description
java.io.File	getDefaultJRE(int vmBitness, java.lang.String path, boolean searchAll)	Finds the default JRE of a given bitness (32 or 64).
static JREFinder	getFinder()	Gets the singleton JREFinder.
java.util.TreeSet<java.io.File>	getJREs(int vmBitness)	Returns all public and private JREs of a given bitness (32 or 64).
boolean	is32BitVM(java.lang.String jrePath)	Determines if a JRE path points to a 32-bit VM.
static boolean	isReady()

Methods inherited from class java.lang.Object

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

Field Detail

JAVA_FILTER

public static final JREFinder.JavaFilter JAVA_FILTER

Method Detail

getFinder

public static JREFinder getFinder()

Gets the singleton JREFinder.

Returns:

the JREFinder

isReady

public static boolean isReady()

is32BitVM

public boolean is32BitVM(java.lang.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 java.util.TreeSet<java.io.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 java.io.File getDefaultJRE(int vmBitness,
                                  java.lang.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