<AWT Dev> RFR: 8263530: sun.awt.X11.ListHelper.removeAll() should use clear() [v2]

[Aleksey Shipilev]

> SonarCloud reports:
>   Remove or correct this "removeAll" call.
> 
>     void removeAll() {
>         items.removeAll(items); // <--- here
>         updateScrollbars();
>     }
> 
> Calling `removeAll()` with the same collection risks concurrent modification exceptions. `clear()` would be correct and more efficient.

Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:

  Update copyright

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2974/files
  - new: https://git.openjdk.java.net/jdk/pull/2974/files/7dc5ab53..d1565744

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2974&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2974&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2974.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2974/head:pull/2974

PR: https://git.openjdk.java.net/jdk/pull/2974