Hi Erel,
I've just tested as your guide. The first step,I try save my code by UTF-8 without BOM ,it's shown as result1.png ,and the second step,I try save my code by UTF-8,it's shown as result2.png.
1.) When I save my code by UTF-8 without BOM (I've haircut a part of the too long messages )
Starting step: Compiling Java code.
Completed successfully.
Starting step: Creating jar file.
Completed successfully.
Starting step: Creating XML file.
C:\Users\ธีระ\Desktop\ThaiDate\src\app\thaidate\jThaiDate.java:14: error: unmappable character for encoding MS874
case 1:return "เน€เธ?เธ?เน€เธ?เธ‘เน€เธ?ย?เน€เธ?เธ?เน€เธ?เธ’เน€เธ?โ€”เน€เธ?เธ”เน€เธ?โ€ขเน€เธ?เธ?เน€เธ?ย?เน€เธ?โ€”เน€เธ?เธ•เน€เธ?ย?";
^
C:\Users\ธีระ\Desktop\ThaiDate\src\app\thaidate\jThaiDate.java:14: error: unmappable character for encoding MS874
case 1:return "เน€เธ?เธ?เน€เธ?เธ‘เน€เธ?ย?เน€เธ?เธ?เน€เธ?เธ’เน€เธ?โ€”เน€เธ?เธ”เน€เธ?โ€ขเน€เธ?เธ?เน€เธ?ย?เน€เธ?โ€”เน€เธ?เธ•เน€เธ?ย?";
^
C:\Users\ธีระ\Desktop\ThaiDate\src\app\thaidate\jThaiDate.java:14: error: unmappable character for encoding MS874
case 1:return "เน€เธ?เธ?เน€เธ?เธ‘เน€เธ?ย?เน€เธ?เธ?เน€เธ?เธ’เน€เธ?โ€”เน€เธ?เธ”เน€เธ?โ€ขเน€เธ?เธ?เน€เธ?ย?เน€เธ?โ€”เน€เธ?เธ•เน€เธ?ย?";
---------HAIRCUT IS HERE-----------
^
C:\Users\ธีระ\Desktop\ThaiDate\src\app\thaidate\jThaiDate.java:55: error: unmappable character for encoding MS874
case 12:return "เน€เธ?ย?เน€เธ?เธ‘เน€เธ?ย?เน€เธ?เธ?เน€เธ?เธ’เน€เธ?ย?เน€เธ?เธ?";
^