<dependency>
    <groupId>org.ftrl</groupId>
    <artifactId>jftrl</artifactId>
    <version>1.0.0-SNAPSHOT</version>
</dependency>

FTRL clf = new FTRL();
clf.interactions = 2; // automatically consider feature interactions up to  a degree of 2
clf.λ1 = 0.0; // disable regularization for the sake of simplicity

clf.fit("true true", Label.FALSE);
clf.fit("true false", Label.TRUE);
clf.fit("false true", Label.TRUE);
clf.fit("false false", Label.FALSE);

clf.predict("true true"); // Label.FALSE
clf.predict("false true"); // Label.TRUE