Java2D：增加线宽

问题描述

我想增加Line2D的宽度。我找不到任何方法来做到这一点。我需要为此实际制作一个小矩形吗？

解决方案

您应该使用 setStroke 来设置 Graphics2D 对象的笔画。

。

I want to increase the Line2D width. I could not find any method to do that. Do I need to actually make a small rectangle for this purpose?

解决方案

You should use setStroke to set a stroke of the Graphics2D object.

The example at http://www.java2s.com gives you some code examples.

The following code produces the image below:

import java.awt.*;
import java.awt.geom.Line2D;
import javax.swing.*;

public class FrameTest {
    public static void main(String[] args) {
        JFrame jf = new JFrame("Demo");
        Container cp = jf.getContentPane();
        cp.add(new JComponent() {
            public void paintComponent(Graphics g) {
                Graphics2D g2 = (Graphics2D) g;
                g2.setStroke(new BasicStroke(10));
                g2.draw(new Line2D.Float(30, 20, 80, 90));
            }
        });
        jf.setSize(300, 200);
        jf.setVisible(true);
    }
}

(Note that the setStroke method is not available in the Graphics object. You have to cast it to a Graphics2D object.)

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