Question

I am looking for the most simple way to control JTextPane (its inner text) font color and font size within selected text only.

I know I must look at StyledDocument but its snippets show the JMenu action listener tricks but not JButton 🙁

I couldn’t find code snippets which could show how to change selected text style by JButton clicked (the actionPerformed(…) method) etc 🙁

I mean something in this direction

• A) I have a text in JTextPane lets say “My home is to turn into
  borabora and this is…”
• B) Text “borabora” is selected in JTextPane
• C) JButton(“size=16”) was clicked
• D) Text “borabora” size becomes 16

I couldn’t find this kind of snippets so I need your advice.

Any useful comment is appreciated

Answer 1

In your actionPerformed method of the applicable jbutton you could run this. (modify as needed.)

String text = jTextPane.getSelectedText();
int cursorPosition = jTextPane.getCaretPosition();

StyleContext context = new StyleContext();
Style style;

jTextPane.replaceSelection("");

style = context.addStyle("mystyle", null);
style.addAttribute(StyleConstants.FontSize, new Integer(16));
jTextPane.getStyledDocument().insertString(cursorPosition - text.length(), text, style);