In general for Linux it’s better to install ImageJ directly instead of apt install imagej. This method also works for Raspberry Pi and other ARM systems.

Install Java Runtime Environment (also works with openjdk-jre)

apt install default-jre

Download latest platform independent ImageJ Unzip to ~/ImageJ recursively

unzip ij*.zip -d ~

Add to ~/.bash_aliases

alias imagej="$HOME/ImageJ/ImageJ"

Close and reopen Terminal, then start ImageJ by:

imagej

Create Imagej icon by creating file ~/.local/share/applications/imagej.desktop with contents:

[Desktop Entry]
Type=Application
Exec=~/ImageJ/ImageJ
Name=ImageJ
Icon=~/ImageJ/images/icon.png
Categories=AudioVideo;Video;Science;

If can’t open ImageJ via the menu/icon,

~/ImageJ/ImageJ

should open ImageJ properly.