minor changes

xchart/src/main/java/com/xeiam/xchart/Series.java

@@ -302,13 +302,13 @@ public class Series {
     return name;
   }
 
-  void replaceXData(Collection<?> newXData) {
+  public void replaceXData(Collection<?> newXData) {
 
     xData = newXData;
     calculateMinMax();
   }
 
-  void replaceYData(Collection<? extends Number> newYData) {
+  public void replaceYData(Collection<? extends Number> newYData) {
 
     yData = newYData;
     calculateMinMax();

xchart/src/main/java/com/xeiam/xchart/XChartPanel.java

@@ -261,7 +261,7 @@ public class XChartPanel extends JPanel {
     series.replaceYData(newYData);
 
     // generate X-Data
-    List<Number> generatedXData = new ArrayList<Number>();
+    List<Integer> generatedXData = new ArrayList<Integer>();
     for (int i = 1; i < newYData.size() + 1; i++) {
       generatedXData.add(i);
     }

xchart/src/main/java/com/xeiam/xchart/internal/chartpart/Axis.java

@@ -49,9 +49,9 @@ public class Axis implements ChartPart {
   /** the axis direction */
   private Direction direction;
 
-  private double min;;
+  private double min;
 
-  private double max;;
+  private double max;
 
   /** the bounds */
   private Rectangle2D bounds;
@@ -84,7 +84,7 @@ public class Axis implements ChartPart {
   }
 
   /**
-   * Reset the default min and max values in preparation for calculating the actualy min and max
+   * Reset the default min and max values in preparation for calculating the actual min and max
    */
   void resetMinMax() {