html <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/css/all.min.css" integrity="sha384-dC5MUAA6qdrDB8HDsN7+ZRwt4hiJFlGsHeaCk/K8ZqDeAfl0Acu7cU7pyml56zL3" crossorigin="anonymous"> html <button><i class="fas fa-times"></i></button> import javax.swing.*; import java.awt.*; public class Main { public static void main(String[] args) { JFrame frame = new JFrame("Font Awesome Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JButton button = new JButton("Click me"); Font fontAwesome = new Font("FontAwesome", Font.PLAIN, 14); button.setFont(fontAwesome); frame.getContentPane().add(button); frame.pack(); frame.setVisible(true); } }