Custom exceptions.

Grapher/src/graph/LineGraph.java

@@ -125,10 +125,10 @@ private void initialize(double width, double height){
         this.onRenderCompleted = new SimpleBooleanProperty();
     }
 
-    public void render(Render value) throws Exception {
+    public void render(Render value) throws RenderException {
         //Check if graph is valid
         if (points.size() < 3)
-            throw new Exception("Cannot render graph with less the 3 points in it.");
+            throw new RenderException("Insufficient points in graph.", new Throwable("Graph was tried to be rendered using "+points.size()+" points."));
 
         //Sort points based on x-axis
         if(isManualEntry){
@@ -257,7 +257,7 @@ public BooleanProperty onRenderCompletedProperty() {
     ///////////////////////////////////////////////////////////////////////////
     // POINT ADDERS
     ///////////////////////////////////////////////////////////////////////////
-    public void addValue(double value){
+    public void addValue(double value) throws RenderException {
         addPointLocal(new Point2D(currentX, value));
         currentX+= interval;
     }
@@ -267,16 +267,16 @@ public void addValue(double value){
      * @param x The x cartesian coordinates of the point.
      * @param y The y cartesian coordinates of the point.
      */
-    public void addPoint(double x, double y){
+    public void addPoint(double x, double y) throws RenderException {
         addPointLocal(new Point2D(x,y));
         isManualEntry = true;
     }
 
-    private void addPointLocal(Point2D point){
+    private void addPointLocal(Point2D point) throws RenderException {
         if(point.getX() == Double.NaN)
-            throw new RuntimeException("X value must be a number.");
+            throw new RenderException("Invalid value.", new Throwable("X value must be a number."));
         if(point.getY() == Double.NaN)
-            throw new RuntimeException("Y value must be a number.");
+            throw new RenderException("Invalid value.", new Throwable("Y value must be a number."));
         points.add(point);
     }
 

Grapher/src/graph/RenderException.java

@@ -0,0 +1,16 @@
+package graph;
+
+/**
+ * Custom exception handling for the exceptions throwed by the graph.
+ */
+public class RenderException extends Exception {
+
+    public RenderException(String message) {
+        super(message);
+    }
+
+    public RenderException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+}