Add working version of UpnFx

1 files changed, 40 insertions, 0 deletions

diff --git a/src/de/fhswf/in/inf/upnfx/util/ObservableDoubleStack.java b/src/de/fhswf/in/inf/upnfx/util/ObservableDoubleStack.java
new file mode 100644
index 0000000..8fbcc6d
--- /dev/null
+++ b/src/de/fhswf/in/inf/upnfx/util/ObservableDoubleStack.java
@@ -0,0 +1,40 @@
+/**
+ * 
+ */
+
+package de.fhswf.in.inf.upnfx.util;
+
+import javafx.beans.property.SimpleListProperty;
+import javafx.collections.FXCollections;
+
+/**
+ * An observable list that has the Stack methods.
+ *
+ * @author Stefan Suhren
+ * @version 1.0
+ */
+public class ObservableDoubleStack extends SimpleListProperty<Double>
+{
+   public ObservableDoubleStack()
+   {
+      super(FXCollections.observableArrayList());
+   }
+
+   public Double peek()
+   {
+      return get(size() - 1);
+   }
+
+   public Double pop()
+   {
+      Double ret = get(size() - 1);
+      remove(size() - 1);
+      return ret;
+   }
+
+   public void push(Double item)
+   {
+      add(item);
+   }
+
+}