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Onyr
Asked: 2020-03-31 14:50:28 +0800 CST

launch4j error at launch, installation impossible Ubuntu 18.04

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I am new to ubuntu software installation "by hand". I want to install launch4j. I have followed the guide from StackExchange and other websites online.

Whatever I try, with or without sudo, using chmod for execute rights, I get this issue:

 ❮ onyr ★  kenzae❯ ❮ Downloads❯❯ sudo tar xf launch4j-3.12-linux.tgz -C /opt
 ❮ onyr ★  kenzae❯ ❮ ~❯❯ cd /opt/launch4j/
 ❮ onyr ★  kenzae❯ ❮ launch4j❯❯ ll
total 288
-rwxr-xr-x  1 root root    160 mai   17  2018 launch4j*
-rwx---r-x  1 root root 199603 mai   17  2018 launch4j.jar*
[...]
 ❮ onyr ★  kenzae❯ ❮ launch4j❯❯ sudo ./launch4j 
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.thoughtworks.xstream.core.util.Fields (file:/opt/launch4j/lib/xstream.jar) to field java.util.Properties.defaults
WARNING: Please consider reporting this to the maintainers of com.thoughtworks.xstream.core.util.Fields
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/java/swing/plaf/windows/WindowsLookAndFeel
    at java.base/java.lang.ClassLoader.defineClass1(Native Method)
    at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
    at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:151)
    at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:821)
    at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:719)
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:642)
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:600)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
    at net.sf.launch4j.Main.main(Main.java:59)
Caused by: java.lang.ClassNotFoundException: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
    ... 10 more

I'm using java 13:

 ❮ onyr ★  kenzae❯ ❮ launch4j❯❯ java --version
java 13.0.2 2020-01-14
Java(TM) SE Runtime Environment (build 13.0.2+8)
Java HotSpot(TM) 64-Bit Server VM (build 13.0.2+8, mixed mode, sharing)

I'm running out of ideas. What should I do ? Thank and take care,

Onyr

EDIT

As proposed, I tried to use JDK 8 using the following commands

sudo apt-get install openjdk-8-jre
sudo update-java-alternatives --set java-1.8.0-openjdk-amd64

However, I still get the same error...

 ❮ onyr ★  kenzae❯ ❮ ~❯❯ java -version
openjdk version "1.8.0_242"
OpenJDK Runtime Environment (build 1.8.0_242-8u242-b08-0ubuntu3~18.04-b08)
OpenJDK 64-Bit Server VM (build 25.242-b08, mixed mode)
 ❮ onyr ★  kenzae❯ ❮ usr❯❯ cd /opt/launch4j/
 ❮ onyr ★  kenzae❯ ❮ launch4j❯❯ ./launch4j 
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.thoughtworks.xstream.core.util.Fields (file:/opt/launch4j/lib/xstream.jar) to field java.util.Properties.defaults
WARNING: Please consider reporting this to the maintainers of com.thoughtworks.xstream.core.util.Fields
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/java/swing/plaf/windows/WindowsLookAndFeel
    at java.base/java.lang.ClassLoader.defineClass1(Native Method)
    at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
    at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:151)
    at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:821)
    at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:719)
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:642)
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:600)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
    at net.sf.launch4j.Main.main(Main.java:59)
Caused by: java.lang.ClassNotFoundException: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
    ... 10 more

More info about my Java installed, maybe the problem comes from there:

 ❮ onyr ★  kenzae❯ ❮ jvm❯❯ sudo update-java-alternatives --set java-1.8.0-openjdk-amd64
update-alternatives: error: no alternatives for jabswitch
update-alternatives: error: no alternatives for jaccessinspector
update-alternatives: error: no alternatives for jaccesswalker
update-alternatives: error: no alternatives for kinit
update-alternatives: error: no alternatives for klist
update-alternatives: error: no alternatives for ktab
update-alternatives: error: no alternatives for mozilla-javaplugin.so
update-java-alternatives: plugin alternative does not exist: /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so
 ❮ onyr ★  kenzae❯ ❮ jvm❯❯ pwd
/usr/lib/jvm
 ❮ onyr ★  kenzae❯ ❮ jvm❯❯ ll
total 40
drwxr-xr-x   5 root root  4096 févr. 29 18:36 ./
drwxr-xr-x 146 root root 12288 mars  28 13:39 ../
lrwxrwxrwx   1 root root    25 avril  8  2018 default-java -> java-1.11.0-openjdk-amd64/
lrwxrwxrwx   1 root root    21 oct.   7  2018 java-1.11.0-openjdk-amd64 -> java-11-openjdk-amd64/
-rw-r--r--   1 root root  2044 janv. 15 16:14 .java-1.11.0-openjdk-amd64.jinfo
drwxr-xr-x   9 root root  4096 févr.  1 14:11 java-11-openjdk-amd64/
drwxr-xr-x   9 root root  4096 févr. 21 16:53 java-13-oracle/
-rw-r--r--   1 root root  3667 févr. 21 16:53 .java-13-oracle.jinfo
lrwxrwxrwx   1 root root    20 janv. 18 00:41 java-1.8.0-openjdk-amd64 -> java-8-openjdk-amd64/
-rw-r--r--   1 root root  2712 janv. 18 00:41 .java-1.8.0-openjdk-amd64.jinfo
drwxr-xr-x   7 root root  4096 févr. 29 18:36 java-8-openjdk-amd64/
software-installation java open-source jar

1 Answers

  1. You have to install OpenJDK 8 instead of Oracle Java 13 with the following commands:

    sudo apt-get install openjdk-8-jre
sudo update-java-alternatives --set java-1.8.0-openjdk-amd64

    and then ./launch4j will show the window.

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