JEditorPane should read a RTF file as well as HTML file. However it's not reading a RTF file. I tried it with both swing-0.7 and swing-pre-0.1 and I got same exception below:

java.lang.IllegalArgumentException:
        at com.sun.java.swing.JEditorPane.createEditorKitForContentType(JEditorP
ane.java:301)
        at com.sun.java.swing.JEditorPane.getEditorKitForContentType(JEditorPane
.java:264)
        at com.sun.java.swing.JEditorPane.setContentType(JEditorPane.java:213)
        at com.sun.java.swing.JEditorPane.setPage(JEditorPane.java:136)
        at com.sun.java.swing.JEditorPane.<init>(JEditorPane.java:68)
        at HtmlReader.<init>(HtmlReader.java:58)
        at HtmlReader.main(HtmlReader.java:83)

With swing-0.7: I could see whole text with some junk characters even though I got above exception.

With swing-pre-0.1: I couldn't see anything and I got above exception.

I attached 2 files to reproduce: HtmlReader.java and test.rtf
To reproduce,
java HtmlReader test.rtf


bae-chul.kim@Eng 1998-01-22