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8331202: Support for Duration until another Instant

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Reviewed-by: joehw, scolebourne, rriggs
This commit is contained in:
Naoto Sato 2024-05-16 16:12:53 +00:00
parent 6f7ddbec7d
commit 259915168d
2 changed files with 58 additions and 3 deletions
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26
src/java.base/share/classes/java/time/Instant.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 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
@ -1162,6 +1162,30 @@ public final class Instant
return unit.between(this, end);
}
/**
* Calculates the {@code Duration} until another {@code Instant}.
* <p>
* The start and end points are {@code this} and the specified instant.
* The result will be negative if the end is before the start. Calling
* this method is equivalent to
* {@link Duration#between(Temporal, Temporal) Duration.between(this,
* endExclusive)}.
* <p>
* This instance is immutable and unaffected by this method call.
*
* @param endExclusive the end {@code Instant}, exclusive, not null
* @return the {@code Duration} from this {@code Instant} until the
* specified {@code endExclusive} {@code Instant}
* @see Duration#between(Temporal, Temporal)
* @since 23
*/
public Duration until(Instant endExclusive) {
Objects.requireNonNull(endExclusive, "endExclusive");
long secsDiff = Math.subtractExact(endExclusive.seconds, seconds);
int nanosDiff = endExclusive.nanos - nanos;
return Duration.ofSeconds(secsDiff, nanosDiff);
}
private long nanosUntil(Instant end) {
long secsDiff = Math.subtractExact(end.seconds, seconds);
long totalNanos = Math.multiplyExact(secsDiff, NANOS_PER_SECOND);