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Hi,
I am working on create my plugins. But I keep getting following error message: Plugin or class not found: "My_Plugin" (java.lang.NoClassDefFoundError: My_Plugin(wrong name:plugins/My_Plugin)) But I am sure I put My_Plugin.java and My_Plugin.class under plugins fold. So how do you guys make your plugins work. Do I need to add something in build.xml for ant? Thanks so much. Hao |
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Hi,
On Tue, 6 Feb 2007, Hao An wrote: > I am working on create my plugins. But I keep getting following error > message: > > Plugin or class not found: "My_Plugin" > (java.lang.NoClassDefFoundError: My_Plugin(wrong > name:plugins/My_Plugin)) > > But I am sure I put My_Plugin.java and My_Plugin.class under plugins > fold. I answered a similar question recently: http://article.gmane.org/gmane.comp.java.imagej/6992 The problem is that unless you package the class files, you _must not_ put the class into a package. In other words, if you remove the line package plugins; from your java file, it will start to work. Hth, Dscho |
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In reply to this post by Hao An
I do not have the line of "package plugins".
I noticed that My_Plugin works for my installed imageJ1.37v, but not for the one generated from source code by ant run. When I click Plugins>Compile and Run. It gave me that: This JVM does not include the javac compiler. Javac is included with the Windows and Linux versions of ImageJ that are bundled with Java. I wrote the macro(write(call("java.lang.System.getProperty", "java.home")), and I got this C:\Program Files\java\jdk1.5.0_04\jre That looks fine to me. But why Plugins>Compile and Run not work for ant-built ImageJ. Many thanks. Hao -----Original Message----- From: Johannes Schindelin [mailto:[hidden email]] Sent: Tuesday, February 06, 2007 4:23 PM To: Hao An Cc: [hidden email] Subject: Re: ImageJ Plugin Hi, On Tue, 6 Feb 2007, Hao An wrote: > I am working on create my plugins. But I keep getting following error > message: > > Plugin or class not found: "My_Plugin" > (java.lang.NoClassDefFoundError: My_Plugin(wrong > name:plugins/My_Plugin)) > > But I am sure I put My_Plugin.java and My_Plugin.class under plugins > fold. I answered a similar question recently: http://article.gmane.org/gmane.comp.java.imagej/6992 The problem is that unless you package the class files, you _must not_ put the class into a package. In other words, if you remove the line package plugins; from your java file, it will start to work. Hth, Dscho |
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Hi,
On Tue, 6 Feb 2007, Hao An wrote: > I do not have the line of "package plugins". That is strange. Your mail said: java.lang.NoClassDefFoundError: My_Plugin(wrong name:plugins/My_Plugin This suggests that somehow this plugin is compiled as if it were in the package "plugins". With current ImageJ, it is not sufficient to put the resulting class file in the directory "plugins". You _have_ to build a jar if your class is in some package. Maybe your compile script does strange things? > I wrote the macro(write(call("java.lang.System.getProperty", > "java.home")), and I got this > > C:\Program Files\java\jdk1.5.0_04\jre > > That looks fine to me. Not to me. The final "jre" says that it is a Java Runtime Environment (JRE), as opposed to Java Development Kit (JDK). Hth, Dscho |
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In reply to this post by Hao An
So what do you get from your ImageJ, when you run macro
write(call("java.lang.System.getProperty", "java.home")); My installed imageJ1.37v (not ant-compiled one) show me: C:\Program Files\ImageJ\jre It is all jre. Why this one can have not problem for compile and run plugins. Thanks. Hao -----Original Message----- From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Johannes Schindelin Sent: Tuesday, February 06, 2007 5:27 PM To: [hidden email] Subject: Re: ImageJ Plugin Hi, On Tue, 6 Feb 2007, Hao An wrote: > I do not have the line of "package plugins". That is strange. Your mail said: java.lang.NoClassDefFoundError: My_Plugin(wrong name:plugins/My_Plugin This suggests that somehow this plugin is compiled as if it were in the package "plugins". With current ImageJ, it is not sufficient to put the resulting class file in the directory "plugins". You _have_ to build a jar if your class is in some package. Maybe your compile script does strange things? > I wrote the macro(write(call("java.lang.System.getProperty", > "java.home")), and I got this > > C:\Program Files\java\jdk1.5.0_04\jre > > That looks fine to me. Not to me. The final "jre" says that it is a Java Runtime Environment (JRE), as opposed to Java Development Kit (JDK). Hth, Dscho |
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> So what do you get from your ImageJ, when you run macro
> write(call("java.lang.System.getProperty", > "java.home")); > > My installed imageJ1.37v (not ant-compiled one) show me: > C:\Program Files\ImageJ\jre > > It is all jre. Why this one can have not problem for compile > and run plugins. The "Compile and Run" command works because there is a copy of tools.jar in the Java extensions folder (ImageJ\jre\lib\ext), and tools.jar contains the javac compiler. wayne > -----Original Message----- > From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of > Johannes Schindelin > Sent: Tuesday, February 06, 2007 5:27 PM > To: [hidden email] > Subject: Re: ImageJ Plugin > > Hi, > > On Tue, 6 Feb 2007, Hao An wrote: > >> I do not have the line of "package plugins". > > That is strange. Your mail said: > > java.lang.NoClassDefFoundError: My_Plugin(wrong > name:plugins/My_Plugin > > This suggests that somehow this plugin is compiled as if it were in > the > package "plugins". With current ImageJ, it is not sufficient to put > the > resulting class file in the directory "plugins". You _have_ to build a > jar > if your class is in some package. > > Maybe your compile script does strange things? > >> I wrote the macro(write(call("java.lang.System.getProperty", >> "java.home")), and I got this >> >> C:\Program Files\java\jdk1.5.0_04\jre >> >> That looks fine to me. > > Not to me. The final "jre" says that it is a Java Runtime Environment > (JRE), as opposed to Java Development Kit (JDK). > > Hth, > Dscho ... [show rest of quote]
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In reply to this post by Hao An
Hi, there is a naming convention.
you name your plugin Plugin_ (with underscore). Otherwise they do not appear in the menu. The other thing that comes in mind is the definition of the classpath. Try someting like java -cp .;ij.jar -jar ij.jar ... etc best _______________________________________________________________________ Dr Dimiter Prodanov, MD, Ph.D. Neural Engineering Rehabilitation Laboratory (Laboratoire de Génie de la Réhabilitation Neurale) Département de Physiologie et Pharmacologie Université catholique de Louvain Avenue Hippocrate, 54 POBox UCL-5446 / B-1200 Bruxelles -Belgique- Phone: 00-322-764 5596 Fax: 00-322-764 9422 http://www.md.ucl.ac.be/gren |
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In reply to this post by dscho
Hi,
I just got a cute little USB flash drive. (OK, I'm a little behind the times.) I want to show off my ImageJ plugin to friends with a Mac. I have a PC. I have copied the ImageJ directory to the flash drive. What else do I need to do so I can run it on a MAC? Can I just add the ImageJ.app directory that comes in the Mac distribution? Anything else? Jon |
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In reply to this post by Hao An
Thanks, Wayne.
I copied and pasted tool.jar to C:\Program Files\java\jdk1.5.0_04\jre\lib\ext, then compile and run function works. Yesterday, I only added tools.jar to the build path in Eclipse. Somehow that did not work. Also I noticed the IDE-generated .class files had no functions. For those plugin java files, I need to compile and run from ImageJ first. Otherwise, I got the java.lang.NoClassDefFoundError message. So my Eclipse-generated .class files were wrong and very misleading, which have to be overwritten by clicking ImageJ's Compile and Run. Hao -----Original Message----- From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Rasband Wayne Sent: Tuesday, February 06, 2007 11:02 PM To: [hidden email] Subject: Re: ImageJ Plugin > So what do you get from your ImageJ, when you run macro > write(call("java.lang.System.getProperty", > "java.home")); > > My installed imageJ1.37v (not ant-compiled one) show me: > C:\Program Files\ImageJ\jre > > It is all jre. Why this one can have not problem for compile > and run plugins. The "Compile and Run" command works because there is a copy of tools.jar in the Java extensions folder (ImageJ\jre\lib\ext), and tools.jar contains the javac compiler. wayne > -----Original Message----- > From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of > Johannes Schindelin > Sent: Tuesday, February 06, 2007 5:27 PM > To: [hidden email] > Subject: Re: ImageJ Plugin > > Hi, > > On Tue, 6 Feb 2007, Hao An wrote: > >> I do not have the line of "package plugins". > > That is strange. Your mail said: > > java.lang.NoClassDefFoundError: My_Plugin(wrong > name:plugins/My_Plugin > > This suggests that somehow this plugin is compiled as if it were in > the > package "plugins". With current ImageJ, it is not sufficient to put > the > resulting class file in the directory "plugins". You _have_ to build a > jar > if your class is in some package. > > Maybe your compile script does strange things? > >> I wrote the macro(write(call("java.lang.System.getProperty", >> "java.home")), and I got this >> >> C:\Program Files\java\jdk1.5.0_04\jre >> >> That looks fine to me. > > Not to me. The final "jre" says that it is a Java Runtime Environment > (JRE), as opposed to Java Development Kit (JDK). > > Hth, > Dscho ... [show rest of quote]
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