Install problem in ubuntu 19.04 (x64)

I try install in ubuntu 19.04 (x64) it have default openjdk 11 "
openjdk 11.0.4 2019-07-16
OpenJDK Runtime Environment (build 11.0.4+11-post-Ubuntu-1ubuntu219.04)
OpenJDK 64-Bit Server VM (build 11.0.4+11-post-Ubuntu-1ubuntu219.04, mixed mode, sharing)
but seems crash

Yes, Capella requires Java 1.8 64 bit to run (64 bit is important!), and ideally this version: JRE 1.8.0_121_64b, it won’t run on Java 11.
You can download and install the right version from this page (search for 8u121): a-archive-javase8-2177648.html
Hope this helps,
Stéphane - Obeo

and how use it ?
also i add this eclipse.ini :
not help me

I am not sure about that, let me try to get some help!

Another solution is to switch globally your java version thanks to update-java-alternatives, see its manpage for usage : alternatives.8.en.html
Best regards,