JDK-8251953 : Release Note: Added isEmpty Default Method to CharSequence
- Type: Sub-task
- Component: core-libs
- Sub-Component: java.lang
- Affected Version: 8u471-perf,15,17.0.17-oracle
- Priority: P4
- Status: Resolved
- Resolution: Delivered
- Submitted: 2020-08-18
- Updated: 2025-09-19
- Resolved: 2025-09-19
The Version table provides details related to the release that this issue/RFE will be addressed.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
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Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
| JDK 15 | JDK 17 | JDK 8 |
|---|---|---|
15Resolved  |
17.0.17-oracleResolved | 8u471-perfResolved |
Description
`java.lang.CharSequence` has been updated in this release to define a default `isEmpty` method that tests if a character sequence is empty. Testing for, and filtering out, empty `String`s and other `CharSequence`s is a common occurrence in code and `CharSequence::isEmpty` can be used as a method reference. Classes that implement `java.lang.CharSequence` and another interface that defines `isEmpty` method should be aware of this addition as they may need to be modified to override the `isEmpty` method.