Tested the JAR for 2.3.3with Java 11 (OpenJdk 11) on Linux (Debian 10 with LxQt desktop). It works but the fonts aren't redered. I had the same trouble with other Java applications since I installed Debian 10 with LxQt desktop environment: Netbeans, OWASP ZAP.
In case the fonts look ugly try
java -Dawt.useSystemAAFontSettings=lcd -jar JDecisiontable-x.y.z.jar
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Tested the JAR for 2.3.3with Java 11 (OpenJdk 11) on Linux (Debian 10 with LxQt desktop). It works but the fonts aren't redered. I had the same trouble with other Java applications since I installed Debian 10 with LxQt desktop environment: Netbeans, OWASP ZAP.
In case the fonts look ugly try
java -Dawt.useSystemAAFontSettings=lcd -jar JDecisiontable-x.y.z.jar
Build on Java 11 was already tested to be working.