What does volatile guarantee?
in [Java Programming]
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From: Lars Enderin on 17 Feb 2010 13:47 Lew wrote: > Mike Schilling wrote: >> I read it differently: that the applet issues the error message >> "Sorry, you need Java 1.5+ to run this Applet", but this makes no >> sense to Lars because he has Java 1.6. > > I think I'm beginning to see what I'm missing. Apparently what Lars > left out is that the applet refuses to run and complains that his > version is not recent enough. > > The "applet refuses to run" part is what I didn't see in his post. > > Do I have that right? > I thought I had a recent Java installed in my browser (Firefox 3.5.7), but it looks like I hadn't. I'm running Ubuntu 6.10 64-bit, and it also appears that I need to have a 32-bit Java JRE if I want to be able to run applets. I already had /usr/lib/jvm/java-6-sun-1.6.0.16/. In fact, I have a lot of Java versions: /usr/lib/jvm: total used in directory 120 available 92249044 drwxr-xr-x 6 root root 4096 2009-11-15 17:38 . drwxr-xr-x 256 root root 86016 2010-02-17 14:57 .. lrwxrwxrwx 1 root root 24 2009-09-11 20:27 ia32-java-6-sun -> ia32-java-6-sun-1.6.0.16 drwxr-xr-x 6 root root 4096 2009-09-11 20:27 ia32-java-6-sun-1.6.0.16 -rw-r--r-- 1 root root 3114 2009-08-28 23:38 .ia32-java-6-sun.jinfo lrwxrwxrwx 1 root root 18 2009-10-30 15:09 java-1.5.0-gcj -> java-1.5.0-gcj-4.4 drwxr-xr-x 6 root root 4096 2009-10-30 15:09 java-1.5.0-gcj-4.4 lrwxrwxrwx 1 root root 14 2009-10-30 15:09 java-1.6.0-openjdk -> java-6-openjdk drwxr-xr-x 8 root root 4096 2009-11-15 17:38 java-6-openjdk -rw-r--r-- 1 root root 2313 2009-11-10 07:41 .java-6-openjdk.jinfo lrwxrwxrwx 1 root root 19 2009-09-11 20:27 java-6-sun -> java-6-sun-1.6.0.16 drwxr-xr-x 6 root root 4096 2009-09-11 20:27 java-6-sun-1.6.0.16 -rw-r--r-- 1 root root 2793 2009-08-28 23:37 .java-6-sun.jinfo lrwxrwxrwx 1 root root 12 2009-10-30 15:09 java-gcj -> java-gcj-4.4 lrwxrwxrwx 1 root root 18 2009-10-30 15:09 java-gcj-4.4 -> java-1.5.0-gcj-4.4 I have now installed java-6-sun-1.6.0,18, i586 version, and can run the applet.
From: John B. Matthews on 17 Feb 2010 13:53 In article <hlha9o$h2l$2(a)news.albasani.net>, Lew <noone(a)lewscanon.com> wrote: > Mike Schilling wrote: > > Lew wrote: > >> Mike Schilling wrote: > >>> Lew wrote: > >>>> Lars Enderin wrote: > >>>>>>> The fontshower applet alone is enough to turn me off. I says: > >>>>>>> Sorry, you need Java 1.5+ to run this Applet. I have Java > >>>>>>> 1.6! > >>>> Lew wrote: > >>>>>> Why is that a problem? You meet the requirement. > >>>> Mike Schilling wrote: > >>>>> But the message says that he doesn't. Perhaps he has a 1.6 JDK > >>>>> installed, but the JRE used by the browser is only at 1.4. > >>>> That's not what the message says. It says that he has Java 6 > >>>> and doesn't even mention a JDK. It also doesn't actually say > >>>> that he has a problem, only that the applet's requirement turns > >>>> him off, an emotional response. > >>> I read it differently: that the applet issues the error message > >>> "Sorry, you need Java 1.5+ to run this Applet", but this makes no > >>> sense to Lars because he has Java 1.6. > >> That's how I read it, too, although both of us had to infer to > >> make that interpretation. Especially because that objection > >> doesn't make sense. According to that interpretation, Lars's > >> system meets the requirement. > > > > Yes. > > > >> Leaving the question, "Why is that a problem?" > > > > Because the applet doesn't recognize that it does. > > How do you figure? It asks for Java 1.5+, and 1.6 is certainly above 1.5. Here's Roedy's <applet> tag: <applet class="cmp" archive="fontshower.jar" code="com.mindprod.fontshower.FontShower.class" width="720" height="660" alt="You need Java 1.5+ to run this Applet." > Sorry, you need Java 1.5+ to run this Applet. </applet> Although the <applet> tag is deprecated, <http://www.w3.org/TR/1999/REC-html401-19991224/struct/objects.html#h-13.4> it is the browser that displays the message: ALT = alternateText: This OPTIONAL attribute specifies any text that should be displayed if the browser understands the APPLET tag but can't run Java applets. -- John B. Matthews trashgod at gmail dot com <http://sites.google.com/site/drjohnbmatthews>
From: Roedy Green on 17 Feb 2010 16:09 On Wed, 17 Feb 2010 10:39:33 +0100, Lars Enderin <lars.enderin(a)telia.com> wrote, quoted or indirectly quoted someone who said : >Sorry, you need Java 1.5+ to run this Applet. >I have Java 1.6! I guess I will have to change that convention throughout the website. JDK 1.5+ means JDK 1.5 or later. -- Roedy Green Canadian Mind Products http://mindprod.com Nothing has really happened until it has been recorded. ~ Virginia Woolf (born: 1882-01-25 died: 1941-03-28 at age: 59)
From: Roedy Green on 17 Feb 2010 16:51 On Wed, 17 Feb 2010 10:39:33 +0100, Lars Enderin <lars.enderin(a)telia.com> wrote, quoted or indirectly quoted someone who said : >Sorry, but you are asking too much from me. I am sorry I commented at >all. The fontshower applet alone is enough to turn me off. I says: >Sorry, you need Java 1.5+ to run this Applet. >I have Java 1.6! Where did you find the message? All I could find were "1.5 or later" messages. Further, if you simply visit the page the Applet should start up without ceremony. -- Roedy Green Canadian Mind Products http://mindprod.com Nothing has really happened until it has been recorded. ~ Virginia Woolf (born: 1882-01-25 died: 1941-03-28 at age: 59)
From: Roedy Green on 17 Feb 2010 18:36
On Wed, 17 Feb 2010 19:47:31 +0100, Lars Enderin <lars.enderin(a)telia.com> wrote, quoted or indirectly quoted someone who said : >> >I thought I had a recent Java installed in my browser (Firefox 3.5.7), >but it looks like I hadn't. I'm running Ubuntu 6.10 64-bit, and it also Most browsers need a 32-bit Java. I have both 32 bit and 64 bit Javas installed on my machine. The Browsers select the 32 bit version and applications select the 64-bit version. If you look below the Applet, you should see this text: 1. This Java Applet (that can also be run as an application) needs at least 32-bit (not 64-bit) Java 1.5. For best results use the latest 1.6.0_18. and a recent browser. 2. Firefox 3.6 requires Java 1.6.0_10 or later. 3. If you have Windows 7 64-bit and Internet Explorer 64-bit, you can use 64-bit Java. -- Roedy Green Canadian Mind Products http://mindprod.com Nothing has really happened until it has been recorded. ~ Virginia Woolf (born: 1882-01-25 died: 1941-03-28 at age: 59) |