Change all classes in core project to use Java instead of Groovy

src/main/groovy/net/zomis/machlearn/main/MachineLearning.java

@@ -0,0 +1,11 @@
+package net.zomis.machlearn.main;
+
+import net.zomis.machlearn.neural.NeuralMain;
+
+public class MachineLearning {
+
+    public static void main(String[] args) {
+        NeuralMain.main(args);
+    }
+
+}

src/main/groovy/net/zomis/machlearn/neural/NeuralMain.java

@@ -0,0 +1,41 @@
+package net.zomis.machlearn.neural;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class NeuralMain {
+
+    public static void main(String[] args) {
+        NeuralNetwork network = new NeuralNetwork();
+
+        NeuronLayer inputLayer = network.createLayer("IN");
+        inputLayer.createNeuron();
+        inputLayer.createNeuron();
+
+        NeuronLayer middleLayer = network.createLayer("MIDDLE");
+        middleLayer.createNeuron().addInputs(inputLayer);
+        middleLayer.createNeuron().addInputs(inputLayer);
+
+        NeuronLayer outputLayer = network.createLayer("OUT");
+        outputLayer.createNeuron().addInputs(middleLayer);
+        outputLayer.createNeuron().addInputs(middleLayer);
+
+        List<LearningData> examples = new ArrayList<>();
+        examples.add(new LearningData(new double[]{0, 0}, new double[]{0, 0}));
+        examples.add(new LearningData(new double[]{0, 1}, new double[]{0, 1}));
+        examples.add(new LearningData(new double[]{1, 0}, new double[]{0, 1}));
+        examples.add(new LearningData(new double[]{1, 1}, new double[]{1, 1}));
+        new Backpropagation(0.2, 100000).backPropagationLearning(examples, network);
+
+        network.printAll();
+
+        for (LearningData data : examples) {
+            double[] output = network.run(data.inputs);
+            System.out.println(Arrays.toString(data.getInputs()) + " --> " + Arrays.toString(output));
+            network.printAll();
+            System.out.println("-----------------");
+        }
+    }
+
+}

src/main/groovy/net/zomis/machlearn/text/BagOfWords.java

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+package net.zomis.machlearn.text;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class BagOfWords {
+    private final Map<String, Integer> counts = new HashMap<>();
+
+    public String[] addText(String s) {
+        String cleaned = s.toLowerCase().replaceAll("['\"\\.\\(\\),]", " ");
+        String[] split = cleaned.split(" ");
+        for (String key : split) {
+            if (!key.isEmpty()) {
+                counts.merge(key, 1, (a, b) -> a + b);
+            }
+        }
+        return split;
+    }
+
+    Map<String, Integer> getData() {
+        return new HashMap<>(counts);
+    }
+
+}