When runinstaller for Oracle 19c database installation is run in Linux environments, a blank screen appears due to problems with fonts. The same problem occurs when the Database Configuration Assistant (dbca) is run after installation. The screenshot will be as follows.
When the “_JAVA_OPTIONS” parameter is set as follows to solve the problem, the corresponding screens will open without problems. Instead of setting the parameter each time, you can add it to profile files such as bash_profile and profile.
# export _JAVA_OPTIONS='-Dsun.java2d.xrender=false'