I am trying to use EXE4j version version 6.0.2 with OpenJDK version 12.0.2. However when I try to compile (or open EXE4j) I get
[exe4j] No JVM could be found on your system.
[exe4j] Please define EXE4J_JAVA_HOME
[exe4j] to point to an installed 64-bit JDK or JRE or download a JRE from
www.java.com.
I already have the environment folders for EXE4J_JAVA_HOME and JAVA_HOME pointing to the base of the JDK. I also added the JDK\bin folder to my path.
Does EXE4j only work with certain versions of Java?
Related
I am using Eclipse 2020-06 (I have made a fresh install of Eclipse instead of upgrading it from an earlier version of Eclipse) and JDK 8 (1.8.0_261). My OS is Windows 10.
JAVA_HOME is set to C:\Program Files\Java\jdk1.8.0_261
When I download "Codename One" plugin from Eclipse Marketplace it shows the version as 6.0 and it says "Installed" at the end of the installation process.
However, when I go to "Help -> Eclipse IDE -> Installation Details" under Eclipse, CodenameOneFeature version is listed as: 1.0.0.201409151325
When I select CodenameOneFeature from this list and hit Update, it says "No updates found". So basically I cannot force it to update to 6.0.
I can confirm that I have the earlier version installed also from the setting of the Codename One projects I create: when I go to Properties -> Java Compiler, the compliance level is set to 1.5 (also 1.5 is used in build.xml file).
BTW, I have also tried installing Eclipse 2019-06 (instead of 2020-06) and/or installing JDK 10 (instead of JDK 8) and/or modifying the eclipse.ini (by adding -vm option) so that it uses the version of JDK I want (instead of setting JAVA_HOME). But no combination of those has solved the problem.
Updated answer:
I found the problem. I broke the update site with a commit a couple of weeks ago. This should be fixed in a couple of hours once server caches refresh.
Original answer:
With Eclipse at this time we only support JDK 8. We're experiencing issues in updating the eclipse plugin to the latest version. Once installed I think you can also use JDK 11 but it doesn't matter since we don't support JDK 11 features.
Once a reasonably new version of the plugin is installed you can press update in Codename One Settings and it will update our libraries to the latest version equivalent to the other IDEs.
Last week I finished development on a test app and ran it successfully in all simulators.
Today I decided to look at publishing the app and used "Sent Android Build". Build status "Successful".
Then tried running jar from command line and got:
peter#PeteSuse:~> java -jar "/home/peter/NetBeansProjects/mobile-apps/pGame/dist/pGame.jar"
java.lang.ArrayIndexOutOfBoundsException: 0
at com.codename1.impl.javase.Executor$1.run(Executor.java:84)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
So tried to run from GUI and got:
run:
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: javafx/embed/swing/JFXPanel
at com.codename1.impl.ImplementationFactory.createImplementation(ImplementationFactory.java:69)
at com.codename1.ui.Display.init(Display.java:566)
at com.codename1.impl.javase.Executor$1.run(Executor.java:112)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
Java version:
peter#PeteSuse:~> java -version
openjdk version "1.8.0_121"
OpenJDK Runtime Environment (IcedTea 3.3.0) (suse-23.1-x86_64)
OpenJDK 64-Bit Server VM (build 25.121-b13, mixed mode)
I am using Netbeans (new to this) on Suse Linux 42.1 64b.
Have I lost a library somewhere? or something else?
Thanks guys. I fixed the problem by adding jfxrt.jar to the Libraries in NetBeans.
JFXPanel is in the JavaFX library.
See: JavaFX and OpenJDK for info on why JavaFX is not available by default in your OpenJDK distribution.
If your linux distribution makes an open JavaFX package available (like ubuntu does: Why is JavaFX is not included in OpenJDK 8 on Ubuntu Wily (15.10)?), then you can use that.
Otherwise you can build from source (for the adventurous yak shaver).
Or, easiest, is just to an Oracle Java distribution.
I don't know codenameone or have any idea how it works. Possibly whatever it is, you could ask the creators to package their thing as a self-contained application, so that it ships with a compatible Java runtime, which would (potentially) avoid issues such as you are encountering. Not knowing codenameone, I don't know if that would make sense or not.
I also don't know the cause of your original ArrayIndexOutOfBoundsException as that looks internal to codenameone or your use of it.
With regards to NetBeans, you might need to set the Java platform to one with JavaFX installed (in case you have multiple Java platforms installed on your machine).
You can run a Codename One application in the simulator by pressing the play button in the IDE. It won't work for you from Command Line and shouldn't since the app shouldn't have a main() method.
You can execute the Codename One simulator from Command Line using:
java -jar JavaSE.jar:dist/MyApp.jar
Notice this assumes your project is the working directory.
Error message :
------------ Deploying frontend ------------
Preparing to deploy:
Created staging directory at: 'C:\Users\JAMESY~1\AppData\Local\Temp\appcfg5730205859174689794.tmp'
Scanning for jsp files.
Compiling jsp files.
java.lang.RuntimeException: Cannot get the System Java Compiler. Please use a JDK, not a JRE.
Debugging information may be found in C:\Users\James Yang\AppData\Local\Temp\appengine-deploy1938777867658475857.log
I have added
-vm
G:\Jdk8\bin\javaw.exe
in eclipse.ini
and My java_home is G:\Jdk8\bin\
Make sure you have the Java Development Kit (JDK) installed in your computer.
Check if you have Java 8 installed, while trying to compile with Java 7, or viceversa. In other words, check if the JDK is set to the wrong version.
Make sure the JDK is FIRST in your Path, by placing %JAVA_HOME%\bin at the beginning of your Path in your System variables.
When trying to deploy my application to the Google App Engine server I get the following error:
Cannot get the System Java Compiler. Please use a JDK, not a JRE.
All solutions I've seen for this involve editing an eclipse configuration file, but I'm not using eclipse. I'm executing appcfg.cmd from the dos prompt. I have a jdk installed and my JAVA_HOME is pointing to it:
c:\program files\java\jdk1.6.0_43
Obviously appcfg.cmd is not looking at JAVA_HOME. It must be getting the JDK location from somewhere else.
Any ideas?
As noted in the comments: Make sure the JDK is FIRST in your PATH.
I had the same issue with appengine sdk 1.8.1 and sts 3.6.4.
I tried adding vm properties to sts.ini file, added %JAVA_HOME% to the beginning of the path variable. But nothing was working as I kept getting the same error.
Cannot get the System Java Compiler. Please use a JDK, not a JRE
Then I found the issue was with Windows\system32\java* file. The appengine was reading the java from Windows\system32.
There were three files.
java.exe
javaw.exe
javaws.exe
I replaced these files from JAVA JDK home as they were from JAVA JRE home during installation. After that, I restarted my sts and everything worked fine as I am able to deploy without issue.
My JSP based application now doesn't deploy. I get the following error:
Cannot get the System Java Compiler. Please use a JDK, not a JRE.
Has anyone found a workaround?
It is likely that you are using some Java code in your JSP as a result of which the JDK is needed to compile that.
Here are some points that you can try:
Check that you are using a JDK and not a JRE. In Eclipse, go to Window --> Preferences and then Java --> Installed JREs. If it is pointing to a JRE and not JDK, I suggest you change that. So install a JDK, remove references to the JRE in the settings here and point it to the JDK only.
If you are still getting the exception above, then I suggest to provide the -vmsetting in eclipse.ini which is found in the same folder as your Eclipse executable.