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+++ b/newrandom/StreamableRng.java	Thu May 23 16:45:56 2019 -0400
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ */
+// package java.util;
+
+import java.math.BigInteger;
+import java.util.stream.DoubleStream;
+import java.util.stream.IntStream;
+import java.util.stream.LongStream;
+
+/**
+ * The {@code StreamableRng} interface augments the {@code Rng} interface
+ * to provide methods that return streams of {@code Rng} objects.
+ * Ideally, such a stream of objects would have the property that the
+ * behavior of each object is statistically independent of all the others.
+ * In practice, one may have to settle for some approximation to this property.
+ *
+ * A generator that implements interface {@link java.util.SplittableRng}
+ * may choose to use its {@code splits} method to implement the {@code rngs}
+ * method required by this interface.
+ *
+ * A generator that implements interface {@link java.util.JumpableRng}
+ * may choose to use its {@code jumps} method to implement the {@code rngs}
+ * method required by this interface.
+ *
+ * A generator that implements interface {@link java.util.LeapableRng}
+ * may choose to use its {@code leaps} method to implement the {@code rngs}
+ * method required by this interface.
+ *
+ * <p>An implementation of the {@code StreamableRng} interface must provide
+ * concrete definitions for the methods {@code nextInt()}, {@code nextLong},
+ * {@code period()}, and {@code rngs()}.
+ * Default implementations are provided for all other methods.
+ *
+ * <p>Objects that implement {@code java.util.StreamableRng} are typically
+ * not cryptographically secure.  Consider instead using
+ * {@link java.security.SecureRandom} to get a cryptographically
+ * secure pseudo-random number generator for use by
+ * security-sensitive applications.
+ *
+ * @author  Guy Steele
+ * @since   1.9
+ */
+
+import java.util.stream.Stream;
+
+interface StreamableRng extends Rng {
+    /**
+     * Returns an effectively unlimited stream of objects, each of
+     * which implements the {@code Rng} interface.  Ideally the
+     * generators in the stream will appear to be statistically
+     * independent.  The new generators should be of the same kind
+     * as this generator.
+     *
+     * @implNote It is permitted to implement this method in a manner
+     * equivalent to {@code rngs(Long.MAX_VALUE)}.
+     *
+     * @return a stream of objects that implement the {@code Rng} interface
+     */
+    Stream<Rng> rngs();
+
+    /**
+     * Returns an effectively unlimited stream of objects, each of
+     * which implements the {@code Rng} interface.  Ideally the
+     * generators in the stream will appear to be statistically
+     * independent.  The new generators should be of the same kind
+     * as this generator.
+     *
+     * @implNote The default implementation calls {@code rngs()} and
+     * then limits its length to {@code streamSize}.
+     *
+     * @param streamSize the number of generators to generate
+     * @return a stream of objects that implement the {@code Rng} interface
+     * @throws IllegalArgumentException if {@code streamSize} is
+     *         less than zero
+     */
+    default Stream<Rng> rngs(long streamSize) {
+	RngSupport.checkStreamSize(streamSize);
+        return rngs().limit(streamSize);
+    }
+}