javax.swing.text.rtf

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1. Basic RTF Document Creation

import javax.swing.text.rtf.RTFEditorKit;

RTFEditorKit rtfKit = new RTFEditorKit();
Document doc = rtfKit.createDefaultDocument();

2. Loading an RTF Document from a File

import javax.swing.JEditorPane;
import javax.swing.text.Document;
import javax.swing.text.rtf.RTFEditorKit;

JEditorPane editorPane = new JEditorPane();
RTFEditorKit rtfKit = new RTFEditorKit();
editorPane.setEditorKit(rtfKit);
editorPane.getDocument().putProperty(Document.StreamDescriptionProperty, new File("sample.rtf"));

3. Saving an RTF Document to a File

import javax.swing.JEditorPane;
import javax.swing.text.Document;
import javax.swing.text.rtf.RTFEditorKit;

JEditorPane editorPane = new JEditorPane();
RTFEditorKit rtfKit = new RTFEditorKit();
editorPane.setEditorKit(rtfKit);
rtfKit.write(editorPane.getDocument(), new FileOutputStream("saved.rtf"));

4. Formatting Text

import javax.swing.text.rtf.RTFAttribute;
import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.StyledDocument;

Document doc = new RTFEditorKit().createDefaultDocument();
StyledDocument styledDoc = (StyledDocument) doc;
styledDoc.setCharacterAttributes(0, 10, new RTFAttribute(RTFAttribute.FONT_SIZE, 14), true);

5. Inserting Images

import javax.swing.text.BadLocationException;
import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.rtf.RTFImage;

RTFEditorKit rtfKit = new RTFEditorKit();
Document doc = rtfKit.createDefaultDocument();
try {
    RTFImage image = new RTFImage("image.png");
    doc.insertString(0, image.getText(), null);
} catch (BadLocationException e) {
    e.printStackTrace();
}

6. Creating Nested Lists

import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.Utilities;
import javax.swing.text.rtf.RTFAttribute;

Document doc = new RTFEditorKit().createDefaultDocument();
Element root = doc.getDefaultRootElement();
Element firstLevel = root.getElement(0);

RTFAttribute listStyle = new RTFAttribute(RTFAttribute.LIST_TYPE, RTFAttribute.LIST_NESTED);
Element secondLevel = Utilities.addList(doc, firstLevel, 0, 1, listStyle);

7. Adding Hyperlinks

import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.rtf.RTFAttribute;

RTFEditorKit rtfKit = new RTFEditorKit();
Document doc = rtfKit.createDefaultDocument();
rtfKit.insertHTML(doc, 0, "<a href=\"www.example.com\">Example</a>",
    0, 0, new RTFAttribute[0]);

8. Using Tables

import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.rtf.RTFAttribute;
import javax.swing.text.Table;
import javax.swing.text.MutableAttributeSet;
import javax.swing.text.SimpleAttributeSet;

RTFEditorKit rtfKit = new RTFEditorKit();
Document doc = rtfKit.createDefaultDocument();

MutableAttributeSet attrs = new SimpleAttributeSet();
attrs.addAttribute(RTFAttribute.ROW, 0);
attrs.addAttribute(RTFAttribute.COL, 0);

doc.insertString(0, "First Cell", attrs);

9. Controlling Paragraph Properties

import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.rtf.RTFAttribute;
import javax.swing.text.ParagraphView;

RTFEditorKit rtfKit = new RTFEditorKit();
Document doc = rtfKit.createDefaultDocument();
Element root = doc.getDefaultRootElement();
Element paragraph = root.getElement(0);

MutableAttributeSet attrs = (MutableAttributeSet) paragraph.getAttributes();
attrs.addAttribute(RTFAttribute.ALIGN, RTFAttribute.ALIGN_CENTER);
attrs.addAttribute(RTFAttribute.LINE_SPACING, 1.5);

10. Using Annotations

import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.Annotation;

RTFEditorKit rtfKit = new RTFEditorKit();
Document doc = rtfKit.createDefaultDocument();
Annotation annotation = new Annotation("Sample Annotation", "author");
doc.addAnnotation(0, doc.getLength(), annotation);

11. Listening for Document Changes

import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;

RTFEditorKit rtfKit = new RTFEditorKit();
Document doc = rtfKit.createDefaultDocument();
doc.addDocumentListener(new DocumentListener() {
    // Handle document changes here
});

12. Customizing the Editor Bar

import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.JTextComponent;

RTFEditorKit rtfKit = new RTFEditorKit();
JTextComponent editor = new JTextComponent(rtfKit);
editor.setEditorKit(rtfKit);
rtfKit.addRTFAction(editor, "bold", "toggle-bold");

13. Extending RTFEditorKit

import javax.swing.text.rtf.RTFEditorKit;

public class CustomRTFEditorKit extends RTFEditorKit {

    @Override
    public Action[] getActions() {
        Action[] actions = super.getActions();
        Action[] newActions = new Action[actions.length + 1];
        System.arraycopy(actions, 0, newActions, 0, actions.length);
        newActions[actions.length] = new CustomAction();
        return newActions;
    }

    // Define the custom action here
}

14. Converting HTML to RTF

import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTMLEditorKit;

RTFEditorKit rtfKit = new RTFEditorKit();
HTMLEditorKit htmlKit = new HTMLEditorKit();
Document htmlDoc = htmlKit.createDefaultDocument();
rtfKit.read(new ByteArrayInputStream(htmlDoc.getText(0, htmlDoc.getLength()).getBytes()), htmlDoc, 0);

15. Converting RTF to HTML

import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTMLEditorKit;

RTFEditorKit rtfKit = new RTFEditorKit();
HTMLEditorKit htmlKit = new HTMLEditorKit();
Document rtfDoc = rtfKit.createDefaultDocument();
htmlKit.read(new ByteArrayInputStream(rtfKit.getText(rtfDoc, 0, rtfDoc.getLength()).getBytes()), rtfDoc, 0);

16. Highlighting Keywords

import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.rtf.RTFAttribute;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;

RTFEditorKit rtfKit = new RTFEditorKit();
Document doc = rtfKit.createDefaultDocument();
StyledDocument styledDoc = (StyledDocument) doc;
Style keywordStyle = styledDoc.addStyle("Keyword", null);
StyleConstants.setForeground(keywordStyle, Color.RED);
for (String keyword : keywords) {
    rtfKit.insertHTML(styledDoc, styledDoc.getLength(), "<font style=\"color:red\">" + keyword + "</font>",
        0, 0, new RTFAttribute[0]);
}

17. Managing Headers and Footers

import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.rtf.RTFAttribute;
import javax.swing.text.MutableAttributeSet;
import javax.swing.text.Section;

RTFEditorKit rtfKit = new RTFEditorKit();
Document doc = rtfKit.createDefaultDocument();
MutableAttributeSet headerAttrs = new HashMap<>();
headerAttrs.addAttribute(RTFAttribute.HEADER, true);