如何在 Java 中在旋转坐标平面上正确绘制数据和文本？

<code class="java">import java.awt.*;
import java.awt.geom.AffineTransform;
import javax.swing.*;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.*;

class DataPanel extends JPanel {
    // ...

    @Override
    protected void paintComponent(Graphics g) {// Override paintComponent() method.
        super.paintComponent(g);
        // ...
        // Invert the y-axis.
        AffineTransform at = g2d.getTransform();//save the graphics context's transform
        g2d.translate(leftStartPlotWindow, blueTop);//translate origin to bottom-left corner of blue rectangle
        g2d.scale(1, -1);//invert the y-axis
        // ...
        // Restore the transform for conventional rendering.
        g2d.setTransform(at);//restore the transform for conventional rendering
        // ...
    }

    // ...
}</code>