B4J Question OpenJDK 17 or 19? JavaFX SDK 17?

aeric

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I understand that the recommended version for B4J (current version 9.80) is OpenJDK 11.
moster67 said:
Should I combine javafx17 with openjdk17?
Or can I leave open jdk11?
Click to expand...

Erel said:
Better to use jdk11 or 14.
Click to expand...

Update OpenJDK

I've been using OpenJDK 14 + OpenJFX 14 from Erels beta release post for a couple of years now for all my B4X projects, it works perfect. My wish is simply to hope that Anywhere Software updates to OpenJDK 18 + OpenJFX 18 sooner rather than later, especially as the B4A and B4J download pages...
www.b4x.com


So, is it a good time to use newer version?

If yes, version 17 or 19?
Do I need to choose OpenJDK 17 since JDK 17 is LTS version? and because JavaFX 17 is also LTS version?

Can I mix OpenJDK 19 with JavaFX SDK 17?

Does it have any effect to B4JPackager11?
 
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Daestrum

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I think using the later versions is good as a lot of the code has been optimized for faster performance.
But.... B4X won't let you use any new features (even in in line java) because of the hard-coded Target and Source switches, these basically limit the compiler to use features in the target/source version, which last time I looked was 11.

But I could be wrong regarding the Target/Source nowadays.
 
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aeric

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It seems JavaFX 17 is no longer available for download.
See post #25

Then I tried OpenJDK 17.0.2 + JavaFX SDK 19.0.2.
Edit: It is working fine but I see a warning message.
It seems conflict occurs in jOkHttpUtils2 library.

B4X: 
WARNING: package com.sun.javafx.embed.swing.oldimpl not in javafx.swing
Waiting for debugger to connect...
Program started.
Call B4XPages.GetManager.LogEvents = True to enable logging B4XPages events.
 
Last edited:
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Erel

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Daestrum said:
But.... B4X won't let you use any new features (even in in line java) because of the hard-coded Target and Source switches, these basically limit the compiler to use features in the target/source version, which last time I looked was 11.
Click to expand...
That's not true. You should be able to access all the underlying APIs.
 
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Daestrum

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As I said I wasn't sure nowadays, as I haven't written anything for ages. Last time I tried with java 16 it still did not allow use of var.
 
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peacemaker

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Maybe @aeric can prepare his bundle of the updated files he used OK, and @Erel can publish it as the new beta-version for trial period ?
The community will test it with own projects, reporting about the result and ... if OK, later the bundle will be the new recommended one in the installation steps.
 
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aeric

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I think Erel has his own ways to test which bundle works.

I am not expert in Java. So far I just tested to use the new versions downloaded from the recommended sites. Usually the latest version is better but LTS is more favorable.
aeric said:
I am using OpenJDK 19.0.2 + JavaFX 19.0.2. It is compiling and creating standalone package.
Click to expand...
If this combination work for me in my B4J projects I will keep it. For B4A maybe further tests are needed.
 
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aeric

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aeric said:
I am using OpenJDK 19.0.2 + JavaFX 19.0.2.
Click to expand...
OpenJDK 19.0.2 (choose Windows / x64 zip and extracted as jdk-19.0.2 folder under C:\Java)
Download: https://jdk.java.net/19/

JavaFX 19.0.2 (extract the SDK to jdk-19.0.2 directory extracted above as javafx folder, jmods into this javafx directory as javafx-jmods)
Download: https://gluonhq.com/products/javafx/

Optional step: copy the oldimpl folder from JDK 11 and paste inside the \javafx\lib\javafx.swing.jar (I made a backup)
to suppress a warning in B4J IDE logs



 
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aeric

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peacemaker said:
Download 2 files (SDK and "jmods") ?

View attachment 138829
Click to expand...
Yes. Follow Erel's instruction in post#2

Update OpenJDK

I've been using OpenJDK 14 + OpenJFX 14 from Erels beta release post for a couple of years now for all my B4X projects, it works perfect. My wish is simply to hope that Anywhere Software updates to OpenJDK 18 + OpenJFX 18 sooner rather than later, especially as the B4A and B4J download pages...
www.b4x.com
 
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aeric

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Can we use Preview features in B4J? I am getting error.

B4X: 
B4J Version: 9.80
Parsing code.    (0.00s)
    Java Version: 19
Building folders structure.    (0.01s)
Compiling code.    (0.00s)
Compiling layouts code.    (0.00s)
Organizing libraries.    (0.00s)
Compiling generated Java code.    Error
B4J line: 18
End Sub
src\b4j\example\main.java:74: error: patterns in switch statements are a preview feature and are disabled by default.
      case String s && s.length() > 5 -> System.out.println(s.toUpperCase());
           ^
  (use --enable-preview to enable patterns in switch statements)
1 error
only showing the first 1 errors, of 5 total; use -Xmaxerrs if you would like to see more

 
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