There are a couple postings on this topic, but I can't get this to work with the latest version of Eclipse. I am using the JRE that comes with 2021-06, the one it puts in p2, x86_64_16.0.2.
I have tried various configurations of User Libraries, Maven dependencies, setting PATH_TO_FX, searching Eclipse Marketplace for JavaFX-as-a-plugin, e.g.,
How do I use JavaFX 11 in Eclipse? (2.5 years old)
https://www.javatpoint.com/javafx-with-eclipse
https://www.tutorialspoint.com/javafx-with-eclipse
https://gluonhq.com/products/javafx/
On a couple more elaborate examples, a couple builds had a scattering of missing methods, which I assume is due to JavaFX being somewhat in flux or instructions being quite outdated. I can get a simple Hello, World to build with javafx-sdk-17.0.1 as a User Library (what I'm doing now) and also some of the other configurations. When I try to launch Hello, World with various build-able configurations, I keep getting
Error: JavaFX runtime components are missing, and are required to run this application
Well, I was a bit too quick. I kept playing around, and adding quotes in the VM arg seems to work,
--module-path="C:\Program Files\Java\javafx-sdk-17.0.1\lib" --add-modules=javafx.controls
If the project is not a module project, the Used Library goes on the Classpath in the project properties, Libraries tab. If it is a module project, it goes on the Modulepath,and the following module-info.java file must be in the src with this minimal information:
module <myProject> {
requires javafx.controls;
exports <myPackageContainingFXAppClass>;
}
I just don't get it why people prefer to search half of the internet for tutorials instead of just consulting the official documentation first. Here it is: https://openjfx.io/openjfx-docs/#IDE-Eclipse It seems to be the best hidden secret that there actually is documentation for JavaFX that one could start with.
I just did the test. Googling for "javafx documentation" gives https://openjfx.io/ as the first search result.
I use --module-path=${PATH_TO_FX} --add-modules=javafx.controls.
Obviously PATH_TO_FX needs to be defined in Preferences->Run/Debug->String Substitution.
Related
I have developed a problem, I cannot resolve.
I am running Net Bean 8.2 Build: 201609300101.
I am running it on a Windows 7 platform.
Yesterday Net Bean worked fine and would generate the jforms for me. Last night something happened and I can no-longer build, compile and run jforms classes.
I can generate and run simple Java programs. I wrote a simple program that just prints "Hello" and that worked.
When I generate a jform, everything looks good in the IDE but it will not build or run.
I get the following error:
c:users\Admin\Documents\Netbeans\KensPanel\nbproject\build-impl.xml:899 Must set src.dir.
None of the NetBeans examples work either and they did yesterday.
In reviewing the posts on the NetBeans forum concerning the problem, I found several that suggested looking in "nbproject directory for a project.properties file. in the file there should be a "build.dir = build" statement. It is there.
I have completely deleted the project and rebuilt the program and that did not work.
I uninstalled the NetBeans program, the JDK and the JRE programs and reinstalled them (JDK & JRE first) and that did not fix the problem.
I put a simple print statement "(System.out.println("Hello");" in the "Public Static void Main(String[] args)" function at the bottom of the KensPanel.java file and the program will compile and print out "Hello" but will not bring up the GUI.
I get the feeling the problem is somehow related to the "ANT" process but anything having anything to do with that is way over my head.
As I stated earlier, the program worked yesterday afternoon. Last night, the IDE decided that it did not want to play any more and I have not been able to find the problem. I am at a loss.
I am real new to the program and for that matter, Java in general. I really need help.
Ken
I think I found my own answer. At least, I got around the problem.
In the New Java application screen, I had left the "create Main Class" box checked. I found in the NetBeans tutorial, the tutorial stated that I needed to "un-check" the box. When I did that, at least my application works. I haven't tried the examples yet.
Moving on to the next learning task.
Ken
I've got a Android AppEngine Connected Project I'm trying to build using GWT2.4 RequestFactory and Objectify on my Eclipse IDE.
Apparently I need to run the RequestFactory Validation Tool because I'm using ServiceName and ProxyForName annotations (these are required especially when working on the Android client side). My problem is the Eclipse can't validate it and the solution provided at http://code.google.com/p/google-web-toolkit/wiki/RequestFactoryInterfaceValidation#IDE_configuration is enough to make me rip my eyes out.
Since I'm working on a Windows machine, the shell script provided is not very useful. Trying to run Validation Tool from a cmd propt returns the error message:"This tool must be run with a JDK, not a JRE"
Can someone explain how this Tool is supposed to be run? Is there a way to use it as an External Tool in eclipse?
Normally if you follow carefully the instructions in the link you show, and run the GWT Development Mode from Eclipse, the Validation should be done automatically at the time you access the development URL with your browser.
For the record, I've actually had some problems with it, but launching the application several times maked it work.
Well, I ran into the same problem as well. When I tried annotation processing (under Java Compiler-> Annotation processing )was being disabled. So RequestFactoryDeobfuscatorBuilder was not being generated. Try enabling that and rebuilding your project.
I've just recovered from two days of hunting this bug down in a project that used to run validation properly but stopped.
In my case I had a new-ish generic BaseRequestContext and a specific sub-interface that extended it. My parent interface declared a method that didn't match the Locator's exactly (e.g. getThing(T) vs get(T)) and this wasn't reported as an error but did stop the validation tool from completing.
Apt is also removed in Java 8 : http://openjdk.java.net/jeps/117 . So beware.
Switching back to Java 7 will fix the issue if you are using Java 8.
I understood why the error happens sometimes in a project: the compiler was complaining it cannot find the directory .apt . But when I tried to create it manually it was not possible (under windows). I think the validation tool mutes the exception of not being able to create the directory: try renaming .apt in your validation tool calls (do a text search in your project)
Java problems
I am a student of Java. I managed to write about 15 Java programs so far and get them working on the PC. But I have not yet written a init() method like my latest assignment requires in order to initialize some instance variables. The compiler tells me that my init() method is attempting to override the final init() method in the acm.program. Isn’t that what an init() method is supposed to do? After exhausting all avenues on PC for the last week, I thought maybe it is an Eclipse problem on the PC. All the example code in the Java documentation shows little Mac windows. So I thought I would try moving my code to a Mac running Lion OS 10.7.2.
Switching to MAC environment.
The Mac claims to have Java installed but I think it’s just the run time environment, not a development environment. All I could find for applications is the Java VisualVM, which I assume is the virtual machine so there is no java development software. So… I downloaded Eclipse for Mac from Stanford’s website and got Eclipse IDE for Java Developers Version: Helios Service Release 2 and tried to run a simple program which included an import statement.
The import acm.program.*; statement is giving the compiler a problem: "acm cannot be resolved”. After researching this I think the problem is I have not downloaded the acm.jar archive and added that to my build path. Why this isn’t already done for me, as part of Eclipse I have no clue. I guess everything has to be difficult.
So I downloaded the acm.jar archive and it’s sitting in my download folder. I tried double clicking it and thankfully the mac won’t execute it. I tried dragging it into my source folder in Eclipse and then adding it to the build path. Once in the build path, Eclipse tells me the jar is missing. So I removed it from the build path and instead from inside Eclipse went to Properties/Java Build Path/Libraries/add External JARS… and navigated to my downloads folder where the acm.jar folder is to select the JAR. However, Eclipse seems to be looking for a .jar;.zip file, which there are none because my Mac helpfully already unzipped the folder. So I changed the open window to look for all files (.) and now I see individual .java files that are too numerous to add to the build path individually.
So back to the PC and download the acm.jar zip file and copy it over to the Mac in unzipped form and again add it to the build path as a zip file. This resolved the compiler error and my simple program executed on the Mac!
Next I will try my program with the init() method to see if that now works. Nope. Same problem on the Mac. This init method causes the following error: Multiple markers at this line
overrides acm.program.Program.init
Cannot override the final method from
Program
public void init() {
canvas = new HangmanCanvas();
add(canvas);
}
Does it have to be this hard or am I missing something?
Generally Macs have the whole JDK installed. Eclipse is nice, though.
This "acm" package isn't installed because it's not any kind of standard thing; this is like asking why your refrigerator doesn't come with asparagus already in it.
That last dialog was the right one; you need the original jar file. Try again, right-click and "Save As..." the link to save the file from your browser.
See 3. I find it particularly funny that anybody would use a Windows computer to make up for shortcomings of a Mac; in reality the Mac is infinitely more flexible and more powerful.
If you got a message that complains you're trying to override a final method, then you are indeed trying to do something wrong; final actually means "You're not allowed to override this." Perhaps you didn't fully understand the instructions for the assignment.
It gets better, I promise. Just be sure to use each of these annoyances as a learning experience.
There is no reasons why Java for the Mac would be any better than Java for the PC. The language and tools should work the same ... assuming that you are using the same versions of the language and similar versions of the tools.
Your problem with init is nothing to do with PCs versus Macs. So don't waste your time switching platforms to try to fix it. You need to figure out what the
On the face of is, the compiler / IDE is telling you the truth. Java won't let you override a final method. In fact the whole point of declaring a method to be final is to prevent overloading.
However, this does not make sense. According to the documentation I found here, the acm.program.Program.init() method is designed to be overridden. So why won't it let you?
I suspect that the cause of your problems is that you've downloaded or been given a copy of the JAR file that someone has messed around with. Someone has changes the method to be final (for some reason best kown to themselves), compiled it and put it up for people to download. Google is not always your friend ...
So, what I suggest you do is review all of the handouts and the files that were provided to find either the copy of the JAR that is provided, or the instructions on WHERE to download it from. Then replace the copy of the JAR you are currently using with the recommended one.
Why this isn’t already done for me, as part of Eclipse I have no clue. I guess everything has to be difficult.
How is Eclipse supposed to know what this "acm" stuff is? Which version you require? Where to download it from?
Lately, I am trying to use Eclipse more often, but so far I have shied away from it because I found it so difficult to install new packages. Whenever I find and try to install a new package, the errors panel flashes a batch of configuration errors. It requires this or that package to install this one. And when I find that package, it turns out that package requires another one that I don't have...and it's been a daunting problem for me.
These days I've been running into these configuration errors:
The current configuration contains errors and this operation can have
unpredictable results.
JST Web Core Patches requires feature "org.eclipse.jst.web_core.feature ".
WST Server Core Patches requires feature "org.eclipse.wst.server_core.feature".
Specifically, I'm looking for help to figure out how to get around these errors. (There aren't any informative pages in Google for "org.eclipse.jst.web_core.feature.")
More generally, though, I am wondering what alternatives I have to the internal package management system of Eclipse? (If I'm doing it wrong and the internal system is not as difficult as it seems to me, let me know of that as well!) I've heard of Pulse, but haven't used that much.
are you using 3.4 Ganymede? .. the dependencies should be figured out and selected for you .. in 3.1 there is a 'Select Required' button in the Updates window which is supposed to locate and select for you all the dependencies
I've been trying to build some huge projects in BCB5 for some time now. I want to use the command line tools because it would cut build time by more than 50% (it already takes 4 hours in the IDE). Often, projects will build just fine in the IDE but fail miserably in the command line. I did some digging and discovered this nice little comment in a header file:
__published: // IDE-managed Components
Is this saying that the components that follow can only be built with the IDE open? Please tell me there is a way around this. BCB5 is starting to make me depressed.
Extra info:
Make.exe gives a pile of errors claiming ambiguity between the header file and an imported file. I''m pretty sure the header file is supposed to be referencing the imported file though, rather than comparing with it.
In the header file:
#include <ComCtrls.hpp>
ComCtrls.hpp has the variable TTreeNode.
Error from make:
[exec] Error E2015 .\TMain.h 876: Ambiguity between 'TTreeNode' and 'Comctrls::TTreeNode'
__published: // IDE-managed Components Is this saying that the
components that follow can only be
built with the IDE open? Please tell
me there is a way around this. BCB5 is
starting to make me depressed.
No, this does not mean that you can only build the source in the IDE. It just means that this section is automatically populated by the IDE (the form designer)
While there are good third party solutions (as mentioned by the others) C++Builder 2007 and above made huge improvements in the build system. IDE build times are very similar to command line builds and the MSBuild integration now makes it possible to be sure that the same parameters are passed to the command line tools as are used by the IDE.
Have you tried installing the C++ Compiler Enhancements plugin, by Andreas Hausladen, which improves the compilation speed. I would also recommend installing the DelphiSpeedUp plugin.
I think you need to export the project as makefile, to compile from the command line, because C++Builder 5 project files are XML. Have a look at this article, from the C++Builder Developer's Journal.
If none of the above fails try the official C++Builder Forum.
I've more or less given up on the BCB5 command line tools. It appears that they are fundamentally broken.
I did, however, manage to find a nice open source tool, ProjectMaker, that uses the command line tools effectively. You can find it here: http://projectmaker.jomitech.com.
ProjectMaker fixes up a few of the problems with BPR2MAK, but it's not perfect. Most project build perfectly with ProjectMaker, some still require the IDE. It's not a perfect solution, but it does alright.