jfuzzylite 1.0 is different from fuzzylite 5.0 in several aspects. I am currently working on getting the next version out this month.
For jfuzzylite 1.0, you always need to specify the conjunction and disjunction norms. In the rule block, change this as follows:
ruleBlock.setConjunction(new Minimum()); ruleBlock.setDisjunction(new Maximum());
These are dummy values as they will not be used.
For jfuzzylite 1.0, perhaps it is better to utilize QtFuzzyLite 4.0 to export your engine to java.