This question has been asked before,但答案并没有解决问题,所以我再问一遍。
有人建议您不要使用g2.drawLine
,而是使用g2.draw(line)
,其中line
是Line2D.Double
。但是,正如您从屏幕截图中看到的那样,线仍然被绘制为好像它们以整数像素结束(每组10条线完全平行)。
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);
}
}
因此,Swing无法正确渲染不完全在像素上结束的线条吗?
答案 0 :(得分:6)
尝试设置以下内容:
g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
取自这个答案: Java - Does subpixel line accuracy require an AffineTransform?
以下是比较结果: