Added class EntityArtillery

EntityArtillery.java

@@ -0,0 +1,31 @@
+import java.awt.*;
+import java.util.Random;
+
+public class EntityArtillery {
+    private int speed;
+    private float weight;
+    private Color bodyColor;
+
+    public void Init(int speed, float weight, Color bodyColor) {
+        Random rnd = new Random();
+        this.speed = speed <= 0 ? rnd.nextInt(50, 150) : speed;
+        this.weight = weight <= 0 ? rnd.nextInt(40, 70) : weight;
+        this.bodyColor = bodyColor;
+    }
+
+    public int getSpeed() {
+        return speed;
+    }
+
+    public float getWeight() {
+        return weight;
+    }
+
+    public Color getBodyColor() {
+        return bodyColor;
+    }
+
+    public float getStep() {
+        return speed * 100 / weight;
+    }
+}