RFR 8214971 : Replace use of string.equals("") with isEmpty()
Hannes Wallnöfer
hannes.wallnoefer at oracle.com
Fri Dec 7 09:24:45 UTC 2018
Hi Roger,
There are quite a few occurrences of the reverse calling pattern "".equals(str) in core libs.
This is a bit more tricky because it allows str to be null, but when used following a null/not-null check it could be replaced with isEmpty() as well.
I wonder if these should be included in the patch?
Hannes
> Am 06.12.2018 um 21:04 schrieb Roger Riggs <Roger.Riggs at oracle.com>:
>
> Please review changing string.equals("") to string.isEmpty().
> isEmpty is preferred, performs better and is easier to optimize.
>
> The change is a literal substitution in all files and only in these modules:
>
> java.base
> java.logging
> java.management
> java.management.rmi
> java.naming
> java.net.http
> java.prefs
> java.rmi
> java.scripting
> java.sql
> java.sql.rowset
> java.xml
> jdk.jartool
> jdk.javadoc
> jdk.jcmd
> jdk.jconsole
> jdk.management.agent
> jdk.naming.dns
> jdk.rmic
>
>
> Webrev:
> http://cr.openjdk.java.net/~rriggs/webrev-string-isempty-8214971-1/
>
> Issue:
> https://bugs.openjdk.java.net/browse/JDK-8214971
>
> Thanks, Roger
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