java swing remove focus box around button text

I had nothing to do, so I wrote a swing interface. After running it, I saw that when the button is clicked, a small box will appear in the middle text that just surrounds the text. This is a sign that the button has gained focus. I think one word: ugly! How to remove it? The almighty Du Niang told me to set the setFocusPainted of the button to false. I tried it and it was ok. I will share the code with you below. You can comment out the sentence about setting the attributes to see the before and after effects.

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;

public class SwingDemo {

    public static void main(String[] args) {
        // TODO 自动生成的方法存根
        JFrame jframe = new JFrame("Demo");
        JButton button = new JButton("JB");
        button.addActionListener(new ActionListener() {
            
            @Override
            public void actionPerformed(ActionEvent e) {
                System.out.println("click JB");
            }
        });
        //去掉按钮文字周围的焦点框
        button.setFocusPainted(false);
        
        jframe.getContentPane().add(button);
        jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        jframe.setBounds(100, 100, 200, 136);
        
        jframe.setVisible(true);
    }

}

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