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How to use JTextPane to style code in Java?
To style code in a TextPane component use the setText() for text and work with HTML tags. For code, use the <code> tag. Also, do not forget to set the content type to “text/html” −
JTextPane pane = new JTextPane();
pane.setContentType("text/html");If you won’t set the content type, then the output will display all these HTML tags inside the JTextPane. Now, set the code inside <code> −
pane.setText("<HTML><BODY><CODE> #include <iostream>; <br> using namespace std; <br>main() {<br>cout << \"Hello World\";<br> return 0;<br>}</CODE><br></BODY></HTML>");The following is an example wherein we will be displaying a code in the JTextPane. The code we are styling here is a sample C++ code −
Example
package my;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.text.BadLocationException;
public class SwingDemo {
public static void main(String args[]) throws BadLocationException {
JFrame frame = new JFrame("Demo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container container = frame.getContentPane();
JTextPane pane = new JTextPane();
pane.setContentType("text/html");
pane.setText("<HTML><BODY><CODE> #include <iostream>; <br> using namespace std; <br>main() {<br>cout << \"Hello World\";<br> return 0;<br>}</CODE><br></BODY></HTML>");
JScrollPane scrollPane = new JScrollPane(pane);
container.add(scrollPane, BorderLayout.CENTER);
frame.setSize(550, 300);
frame.setVisible(true);
}
}The output is as follows. Displays the C++ code in the correct format in a JTextPane −
Output
Updated on: 30-Jul-2019
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