Non-static classes hold a link to their parent classes, which in many cases can be avoided. I updated only private and package-private classes. Didn't touch public/protected to not break external code. Similar cleanup in java.base - [JDK-8261880](https://bugs.openjdk.java.net/browse/JDK-8261880)
------------- Commit messages: - [PATCH] Change nested classes in java.desktop to static nested classes Changes: https://git.openjdk.java.net/jdk/pull/5943/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5943&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8276794 Stats: 219 lines in 79 files changed: 3 ins; 47 del; 169 mod Patch: https://git.openjdk.java.net/jdk/pull/5943.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5943/head:pull/5943 PR: https://git.openjdk.java.net/jdk/pull/5943
