<Swing Dev> RFR: 6816284: Notepad class should be public

[Sergey Bylokhov]

The main class in the Notepad demo made public

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Commit messages:
 - Update Notepad.java

Changes: https://git.openjdk.java.net/jdk/pull/980/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=980&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-6816284
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/980.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/980/head:pull/980

PR: https://git.openjdk.java.net/jdk/pull/980