adopt MVC pattern and add real time graph interface

src/main/java/core/gui/LearningInfoPanel.java

@@ -0,0 +1,41 @@
+package core.gui;
+
+import core.algo.Learning;
+import core.controller.ViewListener;
+
+import javax.swing.*;
+
+public class LearningInfoPanel extends JPanel {
+    private Learning learning;
+    private JLabel policyLabel;
+    private JLabel discountLabel;
+    private JLabel epsilonLabel;
+    private JSlider epsilonSlider;
+    private JSlider delaySlider;
+
+    public LearningInfoPanel(Learning learning, ViewListener viewListener){
+        this.learning = learning;
+        setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
+        policyLabel = new JLabel();
+        discountLabel = new JLabel();
+        epsilonLabel = new JLabel();
+        epsilonSlider = new JSlider(0, 100, (int)(learning.getEpsilon() * 100));
+        epsilonSlider.addChangeListener(e -> viewListener.onEpsilonChange(epsilonSlider.getValue() / 100f));
+        add(policyLabel);
+        add(discountLabel);
+        add(epsilonLabel);
+        add(epsilonSlider);
+        refreshLabels();
+        setVisible(true);
+    }
+
+    public void refreshLabels(){
+        policyLabel.setText("Policy: " + learning.getPolicy().getClass());
+        discountLabel.setText("Discount factor: " + learning.getDiscountFactor());
+        epsilonLabel.setText("Exploration (Epsilon): " + learning.getEpsilon());
+    }
+
+    protected JSlider getEpsilonSlider(){
+        return epsilonSlider;
+    }
+}