RFR: 8327748: Convert javax/swing/JFileChooser/6798062/bug6798062.java applet test to main [v4]

[Prasanta Sadhukhan]

> Conversion of manual applet test to main based using PassFailJFrame manual framework

Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:

  move frame init in createUI

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18180/files
  - new: https://git.openjdk.org/jdk/pull/18180/files/71d387b5..abd16b4f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18180&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18180&range=02-03

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18180.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18180/head:pull/18180

PR: https://git.openjdk.org/jdk/pull/18180