data_structures_free

net/datastructures/EmptyTreeException.java

@@ -0,0 +1,11 @@
+package net.datastructures;
+/**
+ * Runtime exception thrown when one tries to access the root of an
+ * empty tree.
+ */
+
+public class EmptyTreeException extends RuntimeException {  
+  public EmptyTreeException(String err) {
+    super(err);
+  }
+}