Java BasicStroke“模糊”

Question

我正在尝试用Java编写一个简单的绘图小程序，但我遇到了BasicStroke的问题。最初，我的计划是尝试以某种方式绘制一个宽度的线，但API显然不支持。

我尝试使用BasicStroke，但结果只是一个模糊的混乱。如何修复此模糊问题？

private void mousedrag_hook(Point point)
    {
        if(start == null)
            start = point;

            end = point;

            Graphics2D g2d = (Graphics2D)applInstance.buffer_g;
            g2d.setStroke(new BasicStroke(7));

            //g2d.fillOval(point.x - 5, point.y - 5, 10, 10);
            g2d.drawLine(start.x, start.y, end.x, end.y);
            applInstance.repaint();

            start = end;
    }

Answer 1

不要忘记RenderingHints：

@Override
public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2d = (Graphics2D) g;
    g2d.setRenderingHint(
        RenderingHints.KEY_ANTIALIASING,
        RenderingHints.VALUE_ANTIALIAS_ON);
    ...
}