Jiglu uses the Java 8 platform. Either OpenJDK or the Oracle JRE will work fine depending on your preference, though OpenJDK will already come with most Linux distributions. On OpenSuse use:
zypper install java-1_8_0-openjdk
On Amazon Linux 2 instead use:
yum install java-1.8.0-openjdk
If it was already installed you may need to check the correct JRE is set as the default:
update-alternatives --config java