根据三次Bezier曲线的基函数，绘制三次Bezier曲线java

下面是一个简单的Java代码，用于绘制三次Bezier曲线：

import java.awt.*;
import java.awt.geom.*;

public class BezierCurve extends Frame {
    public static void main(String[] args) {
        new BezierCurve();
    }

    public BezierCurve() {
        super("Bezier Curve");
        setSize(500, 500);
        setVisible(true);
    }

    public void paint(Graphics g) {
        Graphics2D g2d = (Graphics2D) g;
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setPaint(Color.RED);

        int[] xPoints = {100, 150, 300, 400};
        int[] yPoints = {200, 450, 150, 300};
        int nPoints = 4;

        GeneralPath path = new GeneralPath();
        path.moveTo(xPoints[0], yPoints[0]);

        for (int i = 0; i < nPoints - 1; i++) {
            float x1 = xPoints[i];
            float y1 = yPoints[i];
            float x2 = xPoints[i + 1];
            float y2 = yPoints[i + 1];
            float ctrlx1 = x1 + (x2 - x1) / 3.0f;
            float ctrly1 = y1 + (y2 - y1) / 3.0f;
            float ctrlx2 = x2 - (x2 - x1) / 3.0f;
            float ctrly2 = y2 - (y2 - y1) / 3.0f;
            path.curveTo(ctrlx1, ctrly1, ctrlx2, ctrly2, x2, y2);
        }

        g2d.draw(path);
    }
}

这段代码使用了Java的`Graphics2D`类来绘制三次Bezier曲线。它使用了`GeneralPath`类来创建Bezier曲线的路径，并使用`curveTo`方法来添加三次Bezier曲线的控制点。具体的实现可以参考代码中的注释。