Use this command to install jdk-openjdk
sudo pacman -Sy jdk-openjdk
and then this command to update other repository packages:
sudo pacman -Syu
Or use Manjaro package manager pamac:
pamac install jdk-openjdk --no-upgrade; pamac update --no-aur
Problem with jdk and jre conflicting - #2 by nikgnomic
@cscs
pacman -Syu jdk-openjdk suggested by Philm in Known issues & solutions is not working for many users