[9] Review request for 8133731: [TEST_BUG] Unmappable in ASCII character such as Thai should be escaped in the regtests targeted for a regular non-I18n runs

[Alexey Ivanov]

Hello Swing team,

Could you please review the fix for jdk9:
    bug: https://bugs.openjdk.java.net/browse/JDK-8133731
    webrev: http://cr.openjdk.java.net/~aivanov/8133731/jdk9/webrev.00/
Problem description:
The java file is encoded as UTF-8, it uses Thai character 'ม' directly. 
In some cases, the test could fail to compile. Or it could test nothing. 
For me, the test passes on Windows with and without the fix for 
JDK-8076164 [1].


The fix:
Use Unicode escape for this character.

As the result of this change, the test fails on builds without the fix 
for JDK-8076164 and passes on newer builds.

I also organized imports and converted anonymous Runnable to lambda.


Regards,
Alexey

[1] https://bugs.openjdk.java.net/browse/JDK-8076164