public static void main(String args[]) { DecisionTree decisionTree = makeOutlookTree(); Map<String, String> case1 = new HashMap<String, String>(); case1.put("Outlook", "Overcast"); case1.put("Temperature", "Hot"); case1.put("Humidity", "High"); case1.put("Wind", "Strong"); try { System.out.println(decisionTree.classify(case1)); } catch (UnknownDecisionException e) { System.out.println("?"); } }