创建具有圆形背景颜色的按钮Java

import javax.swing.*;
import java.awt.*;
import java.awt.geom.Ellipse2D;

public class CircleButton extends JButton {
    private Color backgroundColor;

    public CircleButton(String text, Color backgroundColor) {
        super(text);
        this.backgroundColor = backgroundColor;
        setContentAreaFilled(false);
        setFocusPainted(false);
        setBorderPainted(false);
    }

    @Override
    protected void paintComponent(Graphics g) {
        Graphics2D g2 = (Graphics2D) g.create();
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setColor(backgroundColor);
        g2.fill(new Ellipse2D.Double(0, 0, getWidth() - 1, getHeight() - 1));
        super.paintComponent(g2);
        g2.dispose();
    }

    @Override
    protected void paintBorder(Graphics g) {
        // Do not paint border
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Circle Button Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(200, 200);
        frame.setLayout(new FlowLayout());

        CircleButton button = new CircleButton("Click me", Color.BLUE);
        frame.add(button);

        frame.setVisible(true);
    }
}