error installed eclipse on raspberry pi 4 - eclipse

Question

when I installed eclipse on raspberry pi 4. Eclipse didn't open and show error message.
how can i solve this problem?
An error has occurred. See the log file /home/pi/.eclipse/org.eclipse.platform_3.8_155965261/configuration/1598254313823.log
---------- log
!SESSION Mon Aug 24 07:10:02 BST 2020 ------------------------------------------
!ENTRY org.eclipse.equinox.launcher 4 0 2020-08-24 07:10:02.586
!MESSAGE Exception launching the Eclipse Platform:
!STACK
java.lang.ClassNotFoundException: org.eclipse.core.runtime.adaptor.EclipseStarter
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:626)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
at org.eclipse.equinox.launcher.Main.main(Main.java:1414)

Answer 1

You can try executing eclipse with following parameters
eclipse -clean -console -consoleLog -debug
This will list configurations and what JAR files are going to load.
for example: org.eclipse.core.runtime.adaptor.EclipseStarter
comes from osgi.framework=file:plugins/org.eclipse.osgi_3.8.1.dist.jar within /usr/lib/eclipse/configuration/config.ini
so we could check existense by typing command
ls /usr/lib/eclipse/plugins/org.eclipse.osgi_3.8.1.dist.jar
if file was not there, try use sudo updatedb
to update file location , and then use locate org.eclipse.osgi
Here it will list some JAR files, try to use pcmanfm to open each jar file and check whether org/eclipse/core/runtime/adaptor/EclipseStarter.class existed.
i.e. I found that /usr/share/java/org.eclipse.osgi.nb.jar contains EclipseStarter.class
so it would fix this issue by creating symbolic link through command
sudo ln -s /usr/share/java/org.eclipse.osgi.nb.jar plugins/org.eclipse.osgi_3.8.1.dist.jar
Or, just modify osgi.framework to point to /usr/share/java/org.eclipse.osgi.nb.jar