I would like to use JavaFX for my game's start screen.
However, for some reason, the import "javafx" does not seem to be recognized.
At first, I (for some weird reason) thought I needed e(fx)clipse, however I successfully installed that and it does not fix the issue. I have found nothing else on the internet that fixes the issue.
Do I need to import javafx as a library or something? And if so, where?
Thanks!
Even in Java7, the javafx jar is included, but not in the classpath by default (you need java8 for that).
So, you could just copy the jfxrt.jar from your java installation's /lib directory into your local project's includes, and add it to the classpath there (ie. java -cp .*:lib/*)
You might probably missing right version jdk in your classpath.
above JDK 7u6 versions have JavaFX included with the standard JDK and JRE bundles so you can download it from Oracle website. Here is the link:
http://www.oracle.com/technetwork/java/javase/downloads/index.html
I found the solution to this problem. Please refer and download the jdk 1.8 and installed.
Related
I'm using Ubuntu 20.04 OS. I got
package javafx.application does not exist
error.I read all articles related to topic. I both set my default Java version 8 and also add the openjfx to the Intellij as module and library. Even if I tried solutions I found, still my problem doesn't solved. May it be related to something else that I didn't consider? Which other things I should also check?
Thanks a lot.
If you are working with Java 8, the easiest thing to do (and what I recommend), is to use Oracle JDK 8, not OpenJDK.
Most OpenJDK distributions do not include JavaFX, but Oracle JDK 8 does.
Downloading jfxrt.jar file from a github repo, and placing this file inside the necessary path, which is /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext solves the problem :)
(For Ubuntu 20.04, and Java 8)
I downloaded a JDK from Oracle and try to put it into Unity's JDK path. I see posts that says you have to choose a path inside the JavaVirtualMachine. But I can't find anything in JavaVirtualMachine. I typed the command /usr/libexec/java_home in the terminal and it shows me this - /Library/Java/JavaVirtualMachines/jdk-14.0.1.jdk/Contents/Home
It is suppose to be the path of the JDK. But as I mentioned above, I checked the finder and there is nothing inside the JavaVirtualMachine. Is there anything I am probably missing or done wrong? Any help will be greatly appreciated!
You need to use Unity Hub and download/install the corresponding Android module to the Unity version you are using for your project.
I have problem importing import "javafx.util.Pair" into my program.
after searching the net I've found this answer cannot resolve symbol javafx.application in IntelliJ Idea IDE and I've installed desired jar file but still I've problem to import.
this is what I face to when open java jdk.
I don't know the why the "jfxrt.jar" is different.
note the black arrow on the folder icon
open the File | Project Structure dialog, there under Platform Settings select SDKs and then your JDK 1.8. On the right you then see all the jars that make up the classpath to your SDK. Make sure that your jfxrt.jar is in that list, if not, you can add it by clicking the '+' button at the bottom.
Update May 2020
JavaFX is no longer part of the Oracle or OpenJDK default distributions. Instead it is available as a seperate library or module set.
For instructions on using JavaFX in your application, see the documentation at:
https://openjfx.io
For instructions on working with a modern JavaFX installation and Idea, also see the related question:
IntelliJ can't recognize JavaFX 11 with OpenJDK 11
You don't need to "install the desired jar" (whatever that means).
You don't need to do that for JavaFX. You should not do anything explicitly with jfxrt.jar either in the filesystem or by adding it to a project classpath. If doing something on the filesystem, that is especially bad as jfxrt.jar is not made to be standalone and requires related native libraries shipped with the JDK in order to work.
The JavaFX code should be part of the JDK installation you are using. Perhaps you are using a Java version below 8 or an OpenJDK implementation that does not include JavaFX. If so, then install the Oracle JDK 8+ and set idea to use it. Everything should just work then and all of related JavaFX imports will resolve.
Is there any version of JAVA, or an alternative to JAVA, which is compatible with dial-up. I keep getting the following exception even when using Google Chrome or FireFox.
ClassNotFoundException / org.apache.pivot.wtk.BrowserApplicationContext$HostApplet
I have the latest JAVA Version. Are there any older versions still available? JAVA.com does not seem to have it's own customer support centre
Everything else out there is either pay-by-the-minute or "buy our fix-it program"
Not all existing Java libraries are included in the JDK. You seem to have a piece of code which refers to a library called Apache Pivot. You need to make sure that you have the jar file(s) for this library and that they are in your CLASSPATH when you execute your program. I think you need to find a good book or tutorial.
Instead of including your library to the CLASSPATH environment variable you can also copy the external jar-files to your jdk and jre.
On my system thats for example:
C:\Program Files\Java\jdk1.7.0_21\jre\lib\ext\
and
C:\Program Files\Java\jre7\lib\ext\
I have better experiences with that, than setting the CLASSPATH.
I have a code written in java. when i load it in eclipse it shows an error in the java code import line " The import com.sun.java.browser.plugin2 cannot be resolved"
import com.sun.java.browser.plugin2.*;
How can i fix this error..??
It's possible that it's to do with the version of Java you're building your project with, since the new applet class files were only introduced in Java 1.6 / 6.0. So, right click on your project on the left, go to Properties, Java Build Path, Libraries tab, and scroll down the list until you see JRE System Library. Note the version. If it reads less than 6.0 / 1.6, you're using an old version.
Click on JRE System Library, click Remove (make sure you have at least Java 1.6 installed!) then click Add Library. Select JRE System Library and select your Java version. If this isn't listed, go to Window > Preferences, Java > Installed JREs, click Add, and locate your JRE. Then repeat the same process and it should work.
(Edit: ignore what I said, the com.sun.* classes are hidden from the user. I don't think you can use it)
As far as I know, packages com.sun.* are implementation details of certain jvm and must not be used by application developers. They can be slightly different even between minor versions of jvm. Difference between major versions or jvms of different vendors can be sufficient. So IBM's and Sun's jvms have different structure of those packages. Only packages java.* and javax.* and org.* should be used. To fix this error correctly you must not use this package. To hack it around, you can try configure eclipse to use appropriate jvm though I don't know how to do it.
Update:
There's a FAQ entry about those packages. Thanks to R. Bemrose.
Did you type this in? Then the build path in incorrect. If not no sure what is going on.
Are you sure you are using the right JRE for your project? Like Java6?
See also JRE settings, and then make sure your project uses a Java6 JRE.
You have to add the plugin to the MANIFEST.MF dependency entry
Open MANIFEST.MF
Got to tab Dependencies
Add the plugin your referenced class is placed
You also have to be sure, that the package, the called class is lying, is added in the "Runtime" tab of the MANIFEST file.
EDIT:
The MANIFEST file you can find in the /META-INF directory