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Subject: Backport JDK-8334758: Incorrect note in Javadoc for a few RandomGenerator methods
---
.../java/util/random/RandomGenerator.java | 51 +++++++++----------
1 file changed, 23 insertions(+), 28 deletions(-)
diff --git a/src/java.base/share/classes/java/util/random/RandomGenerator.java b/src/java.base/share/classes/java/util/random/RandomGenerator.java
index a7c6bcec3..5c0d07fb1 100644
--- a/src/java.base/share/classes/java/util/random/RandomGenerator.java
+++ b/src/java.base/share/classes/java/util/random/RandomGenerator.java
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -640,12 +640,11 @@ public interface RandomGenerator {
*
* @throws IllegalArgumentException if {@code bound} is not positive
*
- * @implSpec The default implementation checks that {@code bound} is a
- * positive {@code int}. Then invokes {@code nextInt()}, limiting the result
- * to be greater than or equal zero and less than {@code bound}. If {@code bound}
- * is a power of two then limiting is a simple masking operation. Otherwise,
- * the result is re-calculated by invoking {@code nextInt()} until the
- * result is greater than or equal zero and less than {@code bound}.
+ * @implSpec The default implementation checks that {@code bound} is positive.
+ * It then invokes {@link #nextInt()} one or more times to ensure a uniform
+ * distribution in the range 0 (inclusive)
+ * to {@code bound} (exclusive).
+ * It assumes the distribution of {@link #nextInt()} to be uniform.
*/
default int nextInt(int bound) {
RandomSupport.checkBound(bound);
@@ -666,13 +665,12 @@ public interface RandomGenerator {
* @throws IllegalArgumentException if {@code origin} is greater than
* or equal to {@code bound}
*
- * @implSpec The default implementation checks that {@code origin} and
- * {@code bound} are positive {@code ints}. Then invokes {@code nextInt()},
- * limiting the result to be greater that or equal {@code origin} and less
- * than {@code bound}. If {@code bound} is a power of two then limiting is a
- * simple masking operation. Otherwise, the result is re-calculated by
- * invoking {@code nextInt()} until the result is greater than or equal
- * {@code origin} and less than {@code bound}.
+ * @implSpec The default implementation checks that {@code origin}
+ * is less than {@code bound}.
+ * It then invokes {@link #nextInt()} one or more times to ensure a uniform
+ * distribution in the range {@code origin} (inclusive)
+ * to {@code bound} (exclusive).
+ * It assumes the distribution of {@link #nextInt()} to be uniform.
*/
default int nextInt(int origin, int bound) {
RandomSupport.checkRange(origin, bound);
@@ -699,13 +697,11 @@ public interface RandomGenerator {
*
* @throws IllegalArgumentException if {@code bound} is not positive
*
- * @implSpec The default implementation checks that {@code bound} is a
- * positive {@code long}. Then invokes {@code nextLong()}, limiting the
- * result to be greater than or equal zero and less than {@code bound}. If
- * {@code bound} is a power of two then limiting is a simple masking
- * operation. Otherwise, the result is re-calculated by invoking
- * {@code nextLong()} until the result is greater than or equal zero and
- * less than {@code bound}.
+ * @implSpec The default implementation checks that {@code bound} is positive.
+ * It then invokes {@link #nextLong()} one or more times to ensure a uniform
+ * distribution in the range 0 (inclusive)
+ * to {@code bound} (exclusive).
+ * It assumes the distribution of {@link #nextLong()} to be uniform.
*/
default long nextLong(long bound) {
RandomSupport.checkBound(bound);
@@ -726,13 +722,12 @@ public interface RandomGenerator {
* @throws IllegalArgumentException if {@code origin} is greater than
* or equal to {@code bound}
*
- * @implSpec The default implementation checks that {@code origin} and
- * {@code bound} are positive {@code longs}. Then invokes {@code nextLong()},
- * limiting the result to be greater than or equal {@code origin} and less
- * than {@code bound}. If {@code bound} is a power of two then limiting is a
- * simple masking operation. Otherwise, the result is re-calculated by
- * invoking {@code nextLong()} until the result is greater than or equal
- * {@code origin} and less than {@code bound}.
+ * @implSpec The default implementation checks that {@code origin}
+ * is less than {@code bound}.
+ * It then invokes {@link #nextLong()} one or more times to ensure a uniform
+ * distribution in the range {@code origin} (inclusive)
+ * to {@code bound} (exclusive).
+ * It assumes the distribution of {@link #nextLong()} to be uniform.
*/
default long nextLong(long origin, long bound) {
RandomSupport.checkRange(origin, bound);
--
2.33.0
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