Implementato HeapAdaptablePriorityQueue mediante heap. Implementato SortedListAdaptablePriorityQueue estendendo SortedListPriorityQueue utilizzando l'interfacciaAdaptablePriorityQueue . L'implementazione di entrambi una una classe LocationAwareEntry estensione di Entry.

exceptions/InvalidEntryException.java

@@ -0,0 +1,21 @@
+package exceptions;
+/**
+ * Thrown when a position is determined to be invalid.
+ * @author Roberto Tamassia, Michael Goodrich
+ */
+//Copyright (c) 2003 Brown University, Providence, RI
+//Additional modifications and methods by xgiovio
+
+
+public class InvalidEntryException extends RuntimeException {
+  public InvalidEntryException(String err) {
+    super(err);
+  }
+
+  public InvalidEntryException() {
+      super("Invalid Entry");
+
+  }
+
+}
+