diff --git a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/ContinuousDistribution.java b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/ContinuousDistribution.java
index 2b963d8..ec9493b 100644
--- a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/ContinuousDistribution.java
+++ b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/ContinuousDistribution.java
@@ -23,6 +23,20 @@
  */
 public interface ContinuousDistribution {
     /**
+     * Returns the probability density function (PDF) of this distribution
+     * evaluated at the specified point {@code x}.
+     * In general, the PDF is the derivative of the {@link #cumulativeProbability(double) CDF}.
+     * If the derivative does not exist at {@code x}, then an appropriate
+     * replacement should be returned, e.g. {@code Double.POSITIVE_INFINITY},
+     * {@code Double.NaN}, or the limit inferior or limit superior of the
+     * difference quotient.
+     *
+     * @param x Point at which the PDF is evaluated.
+     * @return the value of the probability density function at {@code x}.
+     */
+    double density(double x);
+
+    /**
      * For a random variable {@code X} whose values are distributed according
      * to this distribution, this method returns {@code P(x0 < X <= x1)}.
      * The default implementation uses the identity
@@ -44,20 +58,6 @@
     }
 
     /**
-     * Returns the probability density function (PDF) of this distribution
-     * evaluated at the specified point {@code x}.
-     * In general, the PDF is the derivative of the {@link #cumulativeProbability(double) CDF}.
-     * If the derivative does not exist at {@code x}, then an appropriate
-     * replacement should be returned, e.g. {@code Double.POSITIVE_INFINITY},
-     * {@code Double.NaN}, or the limit inferior or limit superior of the
-     * difference quotient.
-     *
-     * @param x Point at which the PDF is evaluated.
-     * @return the value of the probability density function at {@code x}.
-     */
-    double density(double x);
-
-    /**
      * Returns the natural logarithm of the probability density function
      * (PDF) of this distribution evaluated at the specified point {@code x}.
      *