有什么方法可以在Swing中以亚像素精度绘制线条？(Is there any way to draw lines with subpixel precision in Swing?)

 这个问题之前已经被问过了 ，但答案并不能解决问题，所以我再问一次。 
 
 有人建议，不要使用g2.drawLine ，你可以使用g2.draw(line) ，其中line是Line2D.Double 。 但是，从屏幕截图中可以看到，线条仍然绘制得像一个整数像素（每组10行完全平行）。 
 
import javax.swing.*;
import java.awt.*;
import java.awt.geom.Line2D;

public class FrameTestBase extends JFrame {

    public static void main(String args[]) {
        FrameTestBase t = new FrameTestBase();
        t.add(new JComponent() {
            public void paintComponent(Graphics g) {
                Graphics2D g2 = (Graphics2D) g;
                g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);
                for (int i = 0; i < 50; i++) {
                    double delta = i / 10.0;
                    double y = 5 + 5*i;
                    Shape l = new Line2D.Double(5, y, 200, y + delta);
                    g2.draw(l);
    // Base case, with ints, looks exactly the same:
    //              g2.drawLine(5, (int)y, 200, (int)(y + delta));
                }
            }
        });

        t.setDefaultCloseOperation(EXIT_ON_CLOSE);
        t.setSize(220, 300);
        t.setVisible(true);
    }
}
 
 
 那么在Swing中不可能正确渲染那些不完全在像素上结束的行？ 

This question has been asked before, but the answers don't solve the problem, so I ask it again. 
 
It was suggested that instead of using g2.drawLine, you could use g2.draw(line), where line is a Line2D.Double. However, as you can see from the screenshot, the lines are still drawn as if they ended on an integer pixel (each set of 10 lines is exactly parallel).
 
import javax.swing.*;
import java.awt.*;
import java.awt.geom.Line2D;

public class FrameTestBase extends JFrame {

    public static void main(String args[]) {
        FrameTestBase t = new FrameTestBase();
        t.add(new JComponent() {
            public void paintComponent(Graphics g) {
                Graphics2D g2 = (Graphics2D) g;
                g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);
                for (int i = 0; i < 50; i++) {
                    double delta = i / 10.0;
                    double y = 5 + 5*i;
                    Shape l = new Line2D.Double(5, y, 200, y + delta);
                    g2.draw(l);
    // Base case, with ints, looks exactly the same:
    //              g2.drawLine(5, (int)y, 200, (int)(y + delta));
                }
            }
        });

        t.setDefaultCloseOperation(EXIT_ON_CLOSE);
        t.setSize(220, 300);
        t.setVisible(true);
    }
}
 
 
So is it impossible in Swing to correctly render lines that don't end exactly on a pixel?

原文：https://stackoverflow.com/questions/12415640