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#775 Doesn't use Java 6 on OS X
Just grabbed the current beta (20090803-r4975) and am giving it a try on a couple of machine. I've run into one misfeature on os x (10.5.7, macbook pro). I've got Java 6 listed first in the Java Preferences utility, and that's the version I get when I use javac or java in the terminal. But DrJava is picking up jdk 5.0_19 as the only available compiler in the popup menu, and it also seems to be running under java 5. It seems to me that DrJava ought to be picking up the JVM preference set in the Java Application preferences. Any suggestions?
We need to know a little bit more about your system to fix this bug. Please go to "Help -> About" and click on "System Properties". Then, click the "Copy System Properties" button and paste the results here in a new comment.
Thanks,
The DrJava Team
And could you please let us know if the previous beta (drjava-beta-20090505-r4932) was working with OS X 10.5.7 and Java 6?
https://sourceforge.net/projects/drjava/files/1.%20DrJava%20Stable%20Releases/drjava-beta-20090505-r4932/
Thanks a lot for your help!
I only have OS X 10.4.11, but for me DrJava works correctly with the Java 6 Developer Preview 6 and SoyLatte (since I have a 32-bit Mac, I can't upgrade to Apple's official Java 6 release).
How are you starting DrJava? Do you use the Mac application and double-click on the DrJava icon, or do you use the .jar file and start it from the command line? If you start it from the command line and the Java 5 java command is placed on the PATH before the Java 6 command, then DrJava will be started with Java 5, regardless of the setting in the Java Preferences utility.
When run with Java 5, Java 6 compilers cannot be used or displayed because of different class file versions.
So, I think the question that needs to be answered here is: Why does your DrJava run with Java5?
It has something to do with the OS X wrapper application. The application only shows JDK 5.0_19, and that is true both of the current beta and the previous 20090505-r4932. If I launch the 20090803-r4975.jar file directly by double-clicking it, it shows both JDK 6.0_13 and JDK 5.0 (no version number) in the compiler popup menu, and JDK 6.0_13 is selected as the default compiler.
I'm going to paste two system properties below. The first is from the application; the second is from the jar version. Look for a line of ########## between them to find the second one faster.
Application system properties:
System Properties:
DrJava Version drjava-20090803-r4975
DrJava Build Time 20090803-2355
drjava.debug.port = 49407
java.runtime.name = Java(TM) 2 Runtime Environment, Standard Edition
sun.boot.library.path = /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Libraries
java.vm.version = 1.5.0_19-137
awt.nativeDoubleBuffering = true
gopherProxySet = false
java.vm.vendor = Apple Inc.
java.vendor.url = http://www.apple.com/
path.separator = :
java.vm.name = Java HotSpot(TM) Client VM
file.encoding.pkg = sun.io
user.country = US
sun.os.patch.level = unknown
java.vm.specification.name = Java Virtual Machine Specification
user.dir = <anonymized user.dir>
java.runtime.version = 1.5.0_19-b02-304
java.awt.graphicsenv = apple.awt.CGraphicsEnvironment
java.endorsed.dirs = /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home/lib/endorsed
os.arch = i386
edu.rice.cs.drjava.icon = <anonymized user.dir>/DrJava.app/Contents/Resources/DrJava.icns
java.io.tmpdir = /var/folders/pU/pUzOeMGFGs8lODSoag5vwE+++TI/-Tmp-/
line.separator = "\u000a"
java.vm.specification.vendor = Sun Microsystems Inc.
os.name = Mac OS X
apple.laf.useScreenMenuBar = true
sun.jnu.encoding = MacRoman
java.library.path = <anonymized user.dir>/DrJava.app/Contents/Resources/Java:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources:.:/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java
java.specification.name = Java Platform API Specification
java.class.version = 49.0
sun.management.compiler = HotSpot Client Compiler
os.version = 10.5.7
http.nonProxyHosts = local|*.local|169.254/16|*.169.254/16
user.home = <anonymized user.home>
user.timezone = America/Los_Angeles
java.awt.printerjob = apple.awt.CPrinterJob
file.encoding = MacRoman
java.specification.version = 1.5
java.class.path = <anonymized user.dir>/DrJava.app/Contents/Resources/Java/drjava.jar
user.name = <anonymized user.name>
apple.awt.graphics.UseQuartz = true
java.vm.specification.version = 1.0
java.home = /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home
sun.arch.data.model = 32
user.language = en
java.specification.vendor = Sun Microsystems Inc.
awt.toolkit = apple.awt.CToolkit
java.vm.info = mixed mode, sharing
java.version = 1.5.0_19
java.ext.dirs = /Library/Java/Extensions:/System/Library/Java/Extensions:/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home/lib/ext
sun.boot.class.path = /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/jsfd.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/classes.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/ui.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/laf.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/sunrsasign.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/jsse.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/jce.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/charsets.jar:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar
java.vendor = Apple Inc.
file.separator = /
java.vendor.url.bug = http://bugreport.apple.com/
sun.io.unicode.encoding = UnicodeLittle
sun.cpu.endian = little
java.rmi.server.hostname = 127.0.0.1
mrj.version = 1050.1.5.0_19-304
socksNonProxyHosts = local|*.local|169.254/16|*.169.254/16
ftp.nonProxyHosts = local|*.local|169.254/16|*.169.254/16
sun.awt.exception.handler = apple.awt.CToolkit$EventQueueExceptionHandler
sun.cpu.isalist =
#DrJava configuration file
#Wed Aug 05 12:33:13 PDT 2009
key.delete.next = [shift DELETE]
key.delete.previous = [shift BACK_SPACE]
window.x = 622
window.y = 200
last.dir = <anonymized user.home>
last.interactions.dir = <anonymized user.home>
tabbedpanes.state = 720 450 700 400
new.version.notification.last = 1249419785352
drjava.survey.notification.last = 1249500781165
drjava.survey.result.last = http://www.drjava.org/submit-usage.php?rev=4975&os.name=Mac%20OS%20X&os.version=10.5.7&java.version=1.5.0_19&java.vendor=Apple%20Inc.
Used memory: about 13.12 megabytes
Free memory: about 2.84 megabytes
Total memory: about 15.97 megabytes
Total memory can expand to: about 63.56 megabytes
Number of processors/cores: 2
##################################
jar version system properties:
System Properties:
DrJava Version drjava-20090803-r4975
DrJava Build Time 20090803-2355
drjava.debug.port = 49432
java.runtime.name = Java(TM) SE Runtime Environment
sun.boot.library.path = /System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Libraries
java.vm.version = 11.3-b02-83
awt.nativeDoubleBuffering = true
gopherProxySet = false
java.vm.vendor = Apple Inc.
java.vendor.url = http://www.apple.com/
path.separator = :
java.vm.name = Java HotSpot(TM) 64-Bit Server VM
file.encoding.pkg = sun.io
sun.java.launcher = SUN_STANDARD
user.country = US
sun.os.patch.level = unknown
java.vm.specification.name = Java Virtual Machine Specification
user.dir = <anonymized user.home>/Desktop
java.runtime.version = 1.6.0_13-b03-211
java.awt.graphicsenv = apple.awt.CGraphicsEnvironment
java.endorsed.dirs = /System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home/lib/endorsed
os.arch = x86_64
apple.awt.graphics.UseOpenGL = false
java.io.tmpdir = /var/folders/pU/pUzOeMGFGs8lODSoag5vwE+++TI/-Tmp-/
line.separator = "\u000a"
java.vm.specification.vendor = Sun Microsystems Inc.
os.name = Mac OS X
apple.laf.useScreenMenuBar = true
sun.jnu.encoding = MacRoman
java.library.path = .:/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java
java.specification.name = Java Platform API Specification
java.class.version = 50.0
sun.management.compiler = HotSpot 64-Bit Server Compiler
os.version = 10.5.7
http.nonProxyHosts = local|*.local|169.254/16|*.169.254/16
user.home = <anonymized user.home>
user.timezone = America/Los_Angeles
java.awt.printerjob = apple.awt.CPrinterJob
file.encoding = MacRoman
java.specification.version = 1.6
java.class.path = <anonymized user.home>/Desktop/drjava-beta-20090803-r4975.jar
user.name = <anonymized user.name>
apple.awt.graphics.UseQuartz = false
java.vm.specification.version = 1.0
java.home = /System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home
sun.arch.data.model = 64
user.language = en
java.specification.vendor = Sun Microsystems Inc.
awt.toolkit = apple.awt.CToolkit
java.vm.info = mixed mode
java.version = 1.6.0_13
java.ext.dirs = /Library/Java/Extensions:/System/Library/Java/Extensions:/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home/lib/ext
sun.boot.class.path = /System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Classes/jsfd.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Classes/classes.jar:/System/Library/Frameworks/JavaVM.framework/Frameworks/JavaRuntimeSupport.framework/Resources/Java/JavaRuntimeSupport.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Classes/ui.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Classes/laf.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Classes/sunrsasign.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Classes/jsse.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Classes/jce.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Classes/charsets.jar
java.vendor = Apple Inc.
file.separator = /
java.vendor.url.bug = http://bugreport.apple.com/
sun.io.unicode.encoding = UnicodeLittle
sun.cpu.endian = little
java.rmi.server.hostname = 127.0.0.1
mrj.version = 1050.1.6.0_13-211
socksNonProxyHosts = local|*.local|169.254/16|*.169.254/16
ftp.nonProxyHosts = local|*.local|169.254/16|*.169.254/16
sun.awt.exception.handler = apple.awt.CToolkit$EventQueueExceptionHandler
sun.cpu.isalist =
#DrJava configuration file
#Wed Aug 05 12:34:37 PDT 2009
key.delete.next = [shift DELETE]
key.delete.previous = [shift BACK_SPACE]
window.x = 622
window.y = 200
last.dir = <anonymized user.home>
last.interactions.dir = <anonymized user.home>
tabbedpanes.state = 720 450 700 400
new.version.notification.last = 1249419785352
drjava.survey.notification.last = 1249500848876
drjava.survey.result.last = http://www.drjava.org/submit-usage.php?rev=4975&os.name=Mac%20OS%20X&os.version=10.5.7&java.version=1.6.0_13&java.vendor=Apple%20Inc.
Used memory: about 21.63 megabytes
Free memory: about 57.75 megabytes
Total memory: about 79.38 megabytes
Total memory can expand to: about 81.44 megabytes
Number of processors/cores: 2
I can reproduce this in a fairly untouched install of OS X 10.5.7. It prefers Java 5 despite the fact that we've requested the highest-priority version available (specified by the Java Preferences app), and Java SE 6 is at the top of my list. I'll look into it.
As a workaround, you can edit DrJava.app/Contents/Info.plist so that the "JVMVersion" key (found in the "Java" section) is set to "1.6+" rather than "1.5+". (To get to this file in Finder, right-click on the "DrJava" application and select "Show Package Contents".) This change will force the app to always use Java 6 or later.
It looks like all 64-bit VMs are ignored when launching a Java app unless no 32-bit alternative can be found -- which would be fine if Apple provided a 32-bit Java 6 VM. As it is, the best I can come up with is to always prefer 64-bit VMs (via a setting in Info.plist), which would force all users (except those without any 64-bit VMs installed) to run 64-bit. I sent an email to the Mac Java mailing list to confirm that my understanding is correct.
Two quick things to add.
- The 8/21 release version of the DrJava application did show both Java 6 and Java 5 on OS X 10.5.8, with Java 6 selected as the default. Don't know how you hacked it, but it seemed to work.
- Over the weekend I upgraded that machine to 10.6, so I won't be able easily to go back and test further on 10.5.8. From a few superficial checks, the latest DrJava seems to work on 10.6. Also interesting is that 10.6 only includes Java 6 - no Java 5 - and there is a choice between an 32-bit and a 64-bit version in the Java preference program.
It seems like this has been fixed to satisfaction.
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