将 Java Graphics 用于小程序时，您可以增加线条粗细吗?我不相信 BasicStroke 有效

问题描述

我无法调整线条粗细.我可以在 Graphics 中这样做还是必须在 Graphics2D 中这样做?如果是这样，我如何更改程序以使其运行?

I am having trouble adjusting line thickness. Can I do that in Graphics or do i have to do it in Graphics2D? If so, how do I alter the program to make it run?

谢谢！

import java.applet.Applet;
import java.awt.*;

public class myAppletNumberOne extends Applet {
    public void paint (Graphics page) {
        //Something here???
    }
}

推荐答案

是的，您必须在 Graphics2D 中执行此操作，但这几乎不是问题，因为 Swing 中的每个 Graphics 都是一个 Graphics2D 对象(它只是保留旧界面以实现兼容性原因).

Yes you have to do it in Graphics2D, but that's hardly an issue, as every Graphics in Swing is a Graphics2D object (it just keeps the old interface for compatibility reasons).

public void paintComponent(Graphics g) {

    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D) g;
    g2.setStroke(new BasicStroke(3));
    g2.drawLine(...);   //thick
    ...

}

如您所见，g2.setStroke(...) 允许您更改笔划，甚至还有一个 BasicStroke 可以轻松选择线宽.

As you can see, the g2.setStroke(...) allows you to change the stroke, and there's even a BasicStroke which provides for easy line width selection.

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