In HTML, " " (without the quotes) is a code character sequence to the server/browser to include an additional space in the DISPLAY of the document. It is an HTML standard to only recognise a single space (the ASCII character 32) for display purposes, and ignore multiple spaces in the stream of HTML instructions. The " " code is to tell the browser that more than one space is wanted in the display of the document. So, in an HTML document, creating an "empty" cell in a table looks like this: <TD> </TD>. And, if your desire is to have four spaces displayed, you will need to write something like " " (again, no quotes) to display four spaces, which would appear as " " (quotes used to display 4 spaces).
If you want to insert the character sequence, " " into an HTML code page, (to indicate to the browser to display a space) then code your
java editor to decode something like hitting F12 to mean: "insert ´ ´ at the cursor" (again without the quotes). Remember, computers do exactly what you tell them to do. If you hit the space bar while in a text editor, it inserts a space in the text.
. My question was actually how to insert content (as spaces) and not how to set a JEditorPane to read and write HTML, caus' this, i know already... 