【Java数字图像处理之Swing基础篇】Java绘制太极图

import javax.swing.*;
import java.awt.*;
import java.awt.geom.Area;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
public class GraphicsDemo extends JFrame{
    public static void main(String[] args) {
        GraphicsDemo demo = new GraphicsDemo();
        demo.setVisible(true);//设置可见
    }
    public GraphicsDemo(){
        this.setSize(300,200);
        this.setTitle("Java绘制太极");
        JPanel panel = new JPanel(){
            @Override
            protected void paintComponent(Graphics g) {
                Graphics2D g2 = (Graphics2D) g;
                g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);//打开抗锯齿
                Shape leftCircle = new Ellipse2D.Double(10,10,300,300);
                Shape rightCircle = new Ellipse2D.Double(10,10,300,300);
                Shape innerCircle1 = new Ellipse2D.Double(85,10,150,150);
                Shape innerCircle2 = new Ellipse2D.Double(85,160,150,150);
                Shape rectAngel1 = new Rectangle2D.Double(160,10,150,300);
                Shape rectAngel2 = new Rectangle2D.Double(10,10,150,300);
                Area left = new Area(leftCircle);
                Area right = new Area(rightCircle);
                Area area1 = new Area(rectAngel1);
                Area area2 = new Area(rectAngel2);
                left.subtract(area1);
                right.subtract(area2);
                Area inner1 = new Area(innerCircle1);
                Area inner2 = new Area(innerCircle2);
                left.add(inner1);
                right.add(inner2);
                right.subtract(inner1);
                Shape minorWhiteCircle = new Ellipse2D.Double(150,70,20,20);
                Shape minorBlackCircle = new Ellipse2D.Double(150,230,20,20);
                g2.setPaint(Color.WHITE);
                g2.fill(left);
                g2.setPaint(Color.BLACK);
                g2.fill(right);
                g2.fill(minorWhiteCircle);
                g2.setPaint(Color.WHITE);
                g2.fill(minorBlackCircle);
                g2.dispose();
            }
        };
        this.add(panel);//添加到当前
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗口关闭程序关闭,相当于System.exit
    }
}