I want to highlight all the text in the Java Swing Control Text Pane

Java 8 Object Oriented Programming Programming

To highlight all the text, use the selectAll() method of the JTextPane component −

JTextPane pane = new JTextPane();
pane.selectAll();

The following is an example to highlight the JTextPane text. Here, we are displaying a code in the JTextPane and highlighting it −

Example

package my;
import java.awt.BorderLayout;
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>");
      pane.selectAll();
      JScrollPane scrollPane = new JScrollPane(pane);
      container.add(scrollPane, BorderLayout.CENTER);
      frame.setSize(550, 300);
      frame.setVisible(true);
   }
}