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8231161: Wrong return type in code sample in Collector API documentation

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Correct declaration of container from R to A and add compilation test

Reviewed-by: smarks, lancea
This commit is contained in:
Julia Boes 2019-10-03 18:59:56 +01:00
parent f1a1fadb63
commit 4dafa3033f
2 changed files with 111 additions and 2 deletions
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8
src/java.base/share/classes/java/util/stream/Collector.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 2019, 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
@ -33,6 +33,10 @@ import java.util.function.BinaryOperator;
import java.util.function.Function;
import java.util.function.Supplier;
// A compilation test for the code snippets in this class-level javadoc can be found at:
// test/jdk/java/util/stream/test/org/openjdk/tests/java/util/stream/CollectorExample.java
// The test needs to be updated if the examples in this javadoc change or new examples are added.
/**
* A <a href="package-summary.html#Reduction">mutable reduction operation</a> that
* accumulates input elements into a mutable result container, optionally transforming
@ -154,7 +158,7 @@ import java.util.function.Supplier;
* Performing a reduction operation with a {@code Collector} should produce a
* result equivalent to:
* <pre>{@code
* R container = collector.supplier().get();
* A container = collector.supplier().get();
* for (T t : data)
* collector.accumulator().accept(container, t);
* return collector.finisher().apply(container);