FULL PRODUCT VERSION :
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

EXTRA RELEVANT SYSTEM CONFIGURATION :
MS Word 2013

A DESCRIPTION OF THE PROBLEM :
RTF Charset ANSI.TXT defines 'Ђ' (=1026) at position 128, which results in a wrong encoding when € is used in Swing, while copyiing the char € from MS Word 2013. We expect to define '€' (=8364) for the index 128 in ANSI.TXT, as it is also defined in http://ascii-table.com/ansi-codes.php.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Copying some Text "abcde€@xyz" from MS Word including the character '€'.
Pasting the copied text into a JTextPane. A blank was inserted instead of '€'. The inserted text is "abcde @xyz".

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The JTextPane contains the Text "abcde€@xyz".
ACTUAL -
The JTextPane contains the Text "abcde @xyz".

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
    public static void main(String[] args) {
        fixEuroCharForANSIEncoding();
    }
    private static void fixEuroCharForANSIEncoding() {
        try {
            final Class<?> rtfReaderClass = Class.forName("javax.swing.text.rtf.RTFReader");
            final Method getCharacterSetMethod = rtfReaderClass.getDeclaredMethod("getCharacterSet", String.class);
            getCharacterSetMethod.setAccessible(true);
            final char[] charSet = (char[]) getCharacterSetMethod.invoke(null, "ansi");
            assert (charSet[128] == 8364); // 8364 == '€'
        } catch (ClassNotFoundException | NoSuchMethodException | SecurityException | IllegalAccessException
                | IllegalArgumentException | InvocationTargetException e) {
            Logger.getLogger(StyledTextEditorKit.class.getName()).log(Level.SEVERE, e.getMessage(), e);
        }
    }
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
    private static void fixEuroCharForANSIEncoding() {
        try {
            final Class<?> rtfReaderClass = Class.forName("javax.swing.text.rtf.RTFReader");
            final Method getCharacterSetMethod = rtfReaderClass.getDeclaredMethod("getCharacterSet", String.class);
            getCharacterSetMethod.setAccessible(true);
            final char[] charSet = (char[]) getCharacterSetMethod.invoke(null, "ansi");
            charSet[128] = 8364; // == '€'
        } catch (ClassNotFoundException | NoSuchMethodException | SecurityException | IllegalAccessException
                | IllegalArgumentException | InvocationTargetException e) {
            Logger.getLogger(StyledTextEditorKit.class.getName()).log(Level.SEVERE, e.getMessage(), e);
        }
    }