issue #55 allow passing into a Series int arrays

xchart-demo/src/main/java/com/xeiam/xchart/demo/charts/line/LineChart06.java

@@ -46,11 +46,11 @@ public class LineChart06 implements ExampleChart {
   @Override
   public Chart getChart() {
 
-    double[] xData = new double[] { 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 };
+    int[] xData = new int[] { 0, 1, 2, 3, 4, 5, 6 };
 
-    double[] yData1 = new double[] { 100, 100, 100, 60, 10, 10, 10 };
+    int[] yData1 = new int[] { 100, 100, 100, 60, 10, 10, 10 };
 
-    double[] errdata = new double[] { 50, 20, 10, 52, 9, 2, 1 };
+    int[] errdata = new int[] { 50, 20, 10, 52, 9, 2, 1 };
 
     Chart chart = new Chart(800, 600);
 

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

@@ -176,6 +176,52 @@ public class Chart {
     return chartPainter.getAxisPair().addSeries(seriesName, xDataNumber, yDataNumber, errorBarDataNumber);
   }
 
+  /**
+   * Add a series to the chart using double arrays
+   * 
+   * @param seriesName
+   * @param xData the X-Axis data
+   * @param xData the Y-Axis data
+   * @return A Series object that you can set properties on
+   */
+  public Series addSeries(String seriesName, int[] xData, int[] yData) {
+
+    return addSeries(seriesName, xData, yData, null);
+  }
+
+  /**
+   * Add a series to the chart using double arrays with error bars
+   * 
+   * @param seriesName
+   * @param xData the X-Axis data
+   * @param xData the Y-Axis data
+   * @param errorBars the error bar data
+   * @return A Series object that you can set properties on
+   */
+  public Series addSeries(String seriesName, int[] xData, int[] yData, int[] errorBars) {
+
+    List<Double> xDataNumber = null;
+    if (xData != null) {
+      xDataNumber = new ArrayList<Double>();
+      for (int d : xData) {
+        xDataNumber.add(new Double(d));
+      }
+    }
+    List<Double> yDataNumber = new ArrayList<Double>();
+    for (int d : yData) {
+      yDataNumber.add(new Double(d));
+    }
+    List<Double> errorBarDataNumber = null;
+    if (errorBars != null) {
+      errorBarDataNumber = new ArrayList<Double>();
+      for (int d : errorBars) {
+        errorBarDataNumber.add(new Double(d));
+      }
+    }
+
+    return chartPainter.getAxisPair().addSeries(seriesName, xDataNumber, yDataNumber, errorBarDataNumber);
+  }
+
   /**
    * Set the chart title
    *