RFR: 8274680: Remove unnecessary conversion to String in java.desktop [v3]

[Andrey Turbanov]

> Cleanup unnecessary String.valueOf calls (and similar) when conversion will happen implicitly anyway

Andrey Turbanov has updated the pull request incrementally with one additional commit since the last revision:

  8274680: Remove unnecessary conversion to String in java.desktop

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5799/files
  - new: https://git.openjdk.java.net/jdk/pull/5799/files/d0cc5f8b..99a8c51e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5799&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5799&range=01-02

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5799.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5799/head:pull/5799

PR: https://git.openjdk.java.net/jdk/pull/5799