Helper Class that works with the Custom Interface

Java Classes & Interfaces/New Calc Engine/src/DynamicHelper.java

@@ -0,0 +1,29 @@
+public class DynamicHelper {
+
+    private final MathProcessing[] handlers;
+
+    public DynamicHelper(MathProcessing[] handlers) {
+        this.handlers = handlers;
+    }
+
+    public void process(String statement) {
+        String[] parts = statement.split(MathProcessing.SEPARATOR);
+        String keyword = parts[0];
+        double leftVal = Double.parseDouble(parts[1]);
+        double rightVal = Double.parseDouble(parts[2]);
+
+        MathProcessing theHandler = null;
+        for(MathProcessing handler : handlers) {
+            if(keyword.equalsIgnoreCase(handler.getKeyWord())) {
+                theHandler = handler;
+                break;
+            }
+        }
+
+        double result = theHandler.doCalculation(leftVal, rightVal);
+        if (theHandler.doFormatting() != null) 
+            System.out.println(theHandler.doFormatting());
+        else
+            System.out.println("result = " + result);
+    }   
+}