在paintComponent() 方法中抗锯齿 [英] Anti-aliasing in paintComponent() method

问题描述

我想使用 paintComponent(..) 方法打印一些文本.

I want to print some text using the paintComponent(..) method.

@Override
  protected void paintComponent(Graphics g) {
    super.paintComponent(g);
    g.setColor(Color.red);
    g.drawString("Hello world", 10, 10);
}

但是文字有点锯齿.在这种方法中，您如何强制使用 [抗锯齿] 进行文本绘制?

But the text is somewhat jaggy. How could you force text drawing with [anti-aliasing] in this method?

谢谢.

推荐答案

您可以通过以下方式设置双缓冲:

You can set double buffering by:

class MyPanel extends JPanel {
    public MyPanel() {
        super(true);//set Double buffering for JPanel
    }
}

或者直接调用<代码>JComponent#setDoubleBuffered(..).

or simply call JComponent#setDoubleBuffered(..).

您还可以将 Graphics2D 对象的 RenderingHints 设置为 anti-aliasing 和 text anti-aliasing通过以下方式提高 Swing 绘画质量:

You can also set RenderingHints for Graphics2D objects like anti-aliasing and text anti-aliasing to improve Swing painting quality by:

  @Override
  protected void paintComponent(Graphics g) {
    super.paintComponent(g); 
    Graphics2D graphics2D = (Graphics2D) g;

    //Set  anti-alias!
    graphics2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
            RenderingHints.VALUE_ANTIALIAS_ON); 

   // Set anti-alias for text
    graphics2D.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
            RenderingHints.VALUE_TEXT_ANTIALIAS_ON); 

    graphics2D.setColor(Color.red);
    graphics2D.drawString("Hello world", 10, 10);
}

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