如何在Raspberry Pi OS上安装JavaFX

Question

我想在Raspberry PI1Model B上运行带有JavaFX包的.jar文件。JavaFX不包含在ARM的JDK8版本中。因此，我试图通过引用以下web站点来安装JavaFX。https://stackoverrun.com/ja/q/11146620

我成功地安装了JDK，并将解压缩文件从zip存档移到JDK所需的文件夹中。之后我尝试运行两个.jar文件。一个.jar文件的GUI由Swing包组成，另一个由JavaFX包组成。由Swing包组成的.jar文件运行良好，如下图所示。悬钩子上的秋千

另一方面，由JavaFX包组成的.jar文件输出错误或警告，如下图所示。Raspbian上的JavaFX

在这些输出之后，不带标题栏的异常GUI被显示。因此，无法最小化、最大化/调整关闭和移动窗口的大小。此外，窗口的周围填充了黑色。在Raspbian上显示JavaFX窗口

注意：如您所知，Java8版本for windows最初包含JavaFX库。

我想解决这个问题。我当前的OS和Java信息如下所示。运行环境

非常感谢你抽出时间。

Answer 1

实际上，现在几乎所有用于ARM的Linux JDK都是64位的。

但是Azul有一个Zulu JDK，您可以从以下网址开始：https://www.Azul.com/downloads/zulu-community/？version=java-11-lts&os=linux&architecture=arm-32-bit-HF&package=JDK

$ cd /usr/lib/jvm
$ sudo wget https://cdn.azul.com/zulu-embedded/bin/zulu11.41.75-ca-jdk11.0.8-linux_aarch32hf.tar.gz
$ sudo tar -xzvf zulu11.41.75-ca-jdk11.0.8-linux_aarch32hf.tar.gz
$ sudo rm zulu11.41.75-ca-jdk11.0.8-linux_aarch32hf.tar.gz
$ ls -l
total 12
lrwxrwxrwx  1 root root   21 Jul 23 15:58 java-1.11.0-openjdk-armhf -> java-11-openjdk-armhf
drwxr-xr-x  9 root root 4096 Aug 20 11:41 java-11-openjdk-armhf
drwxr-xr-x  2 root root 4096 Aug 20 11:41 openjdk-11
drwxrwxr-x 10  111  122 4096 Jul 10 16:50 zulu11.41.75-ca-jdk11.0.8-linux_aarch32hf

$ sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/zulu11.41.75-ca-jdk11.0.8-linux_aarch32hf/bin/java 1
$ sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/zulu11.41.75-ca-jdk11.0.8-linux_aarch32hf/bin/javac 1

$ sudo update-alternatives --config java
There are 2 choices for the alternative java (providing /usr/bin/java).

  Selection    Path                                                             Priority   Status
------------------------------------------------------------
* 0            /usr/lib/jvm/java-11-openjdk-armhf/bin/java                       1111      auto mode
  1            /usr/lib/jvm/java-11-openjdk-armhf/bin/java                       1111      manual mode
  2            /usr/lib/jvm/zulu11.41.75-ca-jdk11.0.8-linux_aarch32hf/bin/java   1         manual mode

Press <enter> to keep the current choice[*], or type selection number: 2
update-alternatives: using /usr/lib/jvm/zulu11.41.75-ca-jdk11.0.8-linux_aarch32hf/bin/java to provide /usr/bin/java (java) in manual mode

$ sudo update-alternatives --config javac
There are 2 choices for the alternative javac (providing /usr/bin/javac).

  Selection    Path                                                              Priority   Status
------------------------------------------------------------
* 0            /usr/lib/jvm/java-11-openjdk-armhf/bin/javac                       1111      auto mode
  1            /usr/lib/jvm/java-11-openjdk-armhf/bin/javac                       1111      manual mode
  2            /usr/lib/jvm/zulu11.41.75-ca-jdk11.0.8-linux_aarch32hf/bin/javac   1         manual mode

Press <enter> to keep the current choice[*], or type selection number: 2
update-alternatives: using /usr/lib/jvm/zulu11.41.75-ca-jdk11.0.8-linux_aarch32hf/bin/javac to provide /usr/bin/javac (javac) in manual mode

$ java -version
openjdk version "11.0.8" 2020-07-14 LTS
OpenJDK Runtime Environment Zulu11.41+75-CA (build 11.0.8+10-LTS)
OpenJDK Client VM Zulu11.41+75-CA (build 11.0.8+10-LTS, mixed mode)

下一步是从https://gluonhq.com/products/JavaFX/>“JavaFX armv6hf SDK”安装JavaFX

$ cd /home/pi
$ wget -O javafx.zip https://gluonhq.com/download/javafx-11-0-2-sdk-armv6hf/
$ unzip javafx.zip
$ rm javafx.zip

完成此操作后，可以使用以下命令运行应用程序：

$ sudo java --module-path /home/pi/armv6hf-sdk/lib --add-modules=javafx.controls -jar YOUR-APP.jar

有关详细的步骤，请查看我博客上的这篇文章:https://webtechie.be/post/2020-08-27-azul-zulu-java-11-and-gluon-javafx-11-on-armv6-raspberry-pi/