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diff --git a/src/main/java/org/apache/commons/math/distribution/HasDensity.java b/src/main/java/org/apache/commons/math/distribution/HasDensity.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.math.distribution;
+
+import org.apache.commons.math.MathException;
+
+/**
+ * <p>Interface that signals that a distribution can compute the probability density function
+ * for a particular point.
+ * @param <P> the type of the point at which density is to be computed, this
+ * may be for example <code>Double.</code></p>
+ *
+ * <p>This interface is deprecated.  As of version 2.0, the {@link ContinuousDistribution}
+ * interface will be extended to include a <code>density(double)<code> method.</p>
+ *
+ * @deprecated to be removed in math 3.0
+ * @version $Revision: 1042336 $ $Date: 2010-12-05 13:40:48 +0100 (dim. 05 déc. 2010) $
+ */
+@Deprecated
+public interface HasDensity<P> {
+
+    /**
+     * Compute the probability density function.
+     * @param x point for which the probability density is requested
+     * @return probability density at point x
+     * @throws MathException if probability density cannot be computed at specifed point
+     */
+    double density(P x) throws MathException;
+
+}