The method `java.util.zip.ZipFile.Source#get` could be improved by usage of `Map.putIfAbsent` instead of separate `containsKey`/`get`/`put` calls. We known that HashMap `java.util.zip.ZipFile.Source#files` can contain only non-null values. And to check if putIfAbsent was successful or not we can just compare result with `null`. It makes code a bit cleaner and faster.
------------- Commit messages: - [PATCH] Avoid redundant Map.containsKey in ZipFile Changes: https://git.openjdk.java.net/jdk/pull/8481/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8481&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8287285 Stats: 6 lines in 1 file changed: 0 ins; 1 del; 5 mod Patch: https://git.openjdk.java.net/jdk/pull/8481.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/8481/head:pull/8481 PR: https://git.openjdk.java.net/jdk/pull/8481
