RFR: 6588: Move JMC core to JDK 8 [v4]

[Henrik Dafgård]

On Tue, 19 Jan 2021 12:43:59 GMT, Marcus Hirt <hirt at openjdk.org> wrote:

>> WIP. Now that core requires JDK 8, we can make it a little bit more easygoing when using streams. I'm thinking it would be nice to remove the need for the StreamModel altogether as well.
>
> Marcus Hirt has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fixing omitted parallel streams

I think this mostly looks fine to merge.

core/org.openjdk.jmc.common/src/main/java/org/openjdk/jmc/common/messages/internal/Messages.java line 58:

> 56: 	public static final String ItemAggregate_VARIANCE = "ItemAggregate_VARIANCE"; //$NON-NLS-1$
> 57: 	public static final String ItemAggregate_VARIANCEP = "ItemAggregate_VARIANCEP"; //$NON-NLS-1$
> 58: 	public static final String ITEM_COLLECTION_DESC = "ITEM_COLLECTION_DESC";

Is this still relevant? I think the key in the properties file was removed?

core/tests/org.openjdk.jmc.common.test/src/test/java/org/openjdk/jmc/common/test/item/StreamTest.java line 2:

> 1: /*
> 2:  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

Year?

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PR: https://git.openjdk.java.net/jmc/pull/194