我用java画直线，怎样才能使得线条粗些？

[dingdong1104]

我用java画直线，怎样才能使得线条粗些？
请给出代码，谢谢！

[nullhue]

import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;

public class thickLine extends Applet {

public void init() {
}

public void paint(Graphics g) {
drawThickLine(g, 0, 0, getSize().width, getSize().height, 5, new Color(0).black);

}

public void drawThickLine(Graphics g, int x1, int y1, int x2, int y2, int thickness, Color c) {
// The thick line is in fact a filled polygon
g.setColor(c);
int dX = x2 - x1;
int dY = y2 - y1;
// line length
double lineLength = Math.sqrt(dX * dX + dY * dY);

double scale = (double) (thickness) / (2 * lineLength);

// The x and y increments from an endpoint needed to create a rectangle...
double ddx = -scale * (double) dY;
double ddy = scale * (double) dX;
ddx += (ddx > 0) ? 0.5 : -0.5;
ddy += (ddy > 0) ? 0.5 : -0.5;
int dx = (int) ddx;
int dy = (int) ddy;

// Now we can compute the corner points...
int xPoints[] = new int[4];
int yPoints[] = new int[4];

xPoints[0] = x1 + dx;
yPoints[0] = y1 + dy;
xPoints[1] = x1 - dx;
yPoints[1] = y1 - dy;
xPoints[2] = x2 - dx;
yPoints[2] = y2 - dy;
xPoints[3] = x2 + dx;
yPoints[3] = y2 + dy;

g.fillPolygon(xPoints, yPoints, 4);
}
}

[lqz790815]

画一个实心的矩形

[lvsam]

直线的函数很简单，也可以在直线的周围补线。例如，根据需要在直线上的每个点的左右加画多条线，很简单。

[lvsam]

不好意思，上面敲错了，应该是在直线的两边多画些线。
如果你的线是（x1,y1）(x2,y2)，你就可以再画几条，如
（x1,y1+1）(x2,y2+1)
（x1,y1+2）(x2,y2+2)
（x1,y1+3）(x2,y2+3)
.....
不过，要在x坐标还是Y坐标上加增量，也或者更完美再两者上面都加增量（这样直线更圆滑），你还是稍微看一下计算机图形学。