import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextPane;
import javax.swing.text.AttributeSet;
import javax.swing.text.Element;
import javax.swing.text.MutableAttributeSet;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
public class Main {
public static void main(String[] args) {
JFrame frame = new TextStyleTestFrame();
frame.setSize(300, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}
class TextStyleTestFrame extends JFrame {
JButton btnStyle = new JButton("Bold");
JTextPane textPane = new JTextPane();
public TextStyleTestFrame() {
textPane.setText("this is a test.");
add(textPane, BorderLayout.CENTER);
add(btnStyle, BorderLayout.NORTH);
btnStyle.addActionListener(e ->changeStyle());
}