fixed some missing serialVersionUID

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/math/trunk@506601 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/commons/math/random/JDKRandomGenerator.java

@@ -26,4 +26,6 @@ import java.util.Random;
  * @version $Revision:$ $Date$
  */
 public class JDKRandomGenerator extends Random implements RandomGenerator {
+    /** Serializable version identifier */
+    private static final long serialVersionUID = -3561898582944940550L;
 }

src/java/org/apache/commons/math/random/RandomAdaptor.java

@@ -27,6 +27,9 @@ import java.util.Random;
  */
 public class RandomAdaptor extends Random implements RandomGenerator {
     
+    /** Serializable version identifier */
+    private static final long serialVersionUID = 2570805822599485047L;
+
     /** Wrapped randomGenerator instance */
     private RandomGenerator randomGenerator = null;
     

src/java/org/apache/commons/math/special/Beta.java

@@ -28,6 +28,10 @@ import org.apache.commons.math.util.ContinuedFraction;
  * @version $Revision$ $Date$
  */
 public class Beta implements Serializable {
+
+    /** Serializable version identifier */
+    private static final long serialVersionUID = -3833485397404128220L;
+
     /** Maximum allowed numerical error. */
     private static final double DEFAULT_EPSILON = 10e-9;
 
@@ -127,6 +131,9 @@ public class Beta implements Serializable {
             ret = 1.0 - regularizedBeta(1.0 - x, b, a, epsilon, maxIterations);
         } else {
             ContinuedFraction fraction = new ContinuedFraction() {
+
+                private static final long serialVersionUID = -7658917278956100597L;
+
                 protected double getB(int n, double x) {
                     double ret;
                     double m;

src/java/org/apache/commons/math/special/Erf.java

@@ -28,6 +28,9 @@ import org.apache.commons.math.MathException;
  */
 public class Erf implements Serializable {
 
+    /** Serializable version identifier */
+    private static final long serialVersionUID = 490960015010326571L;
+
     /**
      * Default constructor.  Prohibit instantiation.
      */