Re: How can I run ImageJ with Java 1.6 on my MacBook?

Posted by Bill Mohler on
URL: http://imagej.273.s1.nabble.com/How-can-I-run-ImageJ-with-Java-1-6-on-my-MacBook-tp3691203p3691205.html

Any trick to getting ImageJ64 to launch on a Mac?  When I double-click,
I see the icon react, but don't find any application opening.  FYI, I
had been running ImageJ(32) earlier.  Do I need to reboot?

I have IJ 1.43F on OS 10.5.8, Java 1.5.0_19 (32bit).  I think I'm all
up-to-date.

Thanks,
Bill

Wayne Rasband wrote:

>
> > I have a MacBook running Mac OS X 10.5.8 with
> > 1 GB of RAM. I would like to use Jerek Sacha's
> > ij-plugins-toolkit, but they require Java 1.6.
> >
> > I have Java SE 1.6 64 bit on this Mac as well as Java 1.5,
> > but the ImageJ Installation page mentions ImageJ will only
> > use Java 1.6 if the machine has more than 2.5 GB RAM.
> >
> > So is there any way to convince my copy of ImageJ to
> > use Java 1.6 without stuffing more RAM into my MacBook?
>
> ImageJ for Mac OS X comes with two applications (launchers), ImageJ
> and ImageJ64. On Mac OS X 10.5 (Leopard), ImageJ uses a 32-bit version
> of Java 1.5 and ImageJ64 uses a 64-bit version of Java 1.6. On Mac OS
> X 10.6 (Snow Leopard), ImageJ uses a 32-bit version of Java 1.6 and
> ImageJ64 uses a 64-bit version of Java 1.6. ImageJ64 is much faster
> than ImageJ but it crashes more often and it is not able to run
> commands, such as File>Import> Using QuickTime, that use QuickTime for
> Java. Image64 does not required 2.5 GB or RAM but it is able to use
> more than 1.8 GB if you have more than 2 GB installed.
>
> I did some benchmarking and found that the getPixel() method is ~4
> times faster when running ImageJ64. It is as fast as directly
> accessing the pixel data, which means that Java 1.6 must be inlining
> the getPixel() method.
>
> -wayne
>

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William A. Mohler
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Dept. of Genetics and Developmental Biology
University of Connecticut Health Center
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