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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: 2019-07-30T22:30:26+05:30
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