用JAVA画个星条旗
</td></tr> </table>
public class DrawFlag
{
public static void main(java.lang.String[] args) throws java.io.IOException
{
DrawFlag.drawFlag();
}
public static void drawFlag() throws java.io.IOException
{
java.awt.image.BufferedImage bufferedImage =
new java.awt.image.BufferedImage(420, 221, java.awt.image.BufferedImage.TYPE_INT_RGB);
java.awt.Graphics gp = bufferedImage.getGraphics();
java.awt.Color color = new java.awt.Color(0);
for (int i = 0; i < 13; i++)
{
if (i % 2 == 0)
{
color = new java.awt.Color(204, 0, 0);
}
else
{
color = new java.awt.Color(255, 255, 255);
}
gp.setColor(color);
gp.fillRect(0, 17 * i, 420, 17);
}
color = new java.awt.Color(0, 0, 102);
gp.setColor(color);
gp.fillRect(0, 0, 168, 119);
color = new java.awt.Color(255, 255, 255);
gp.setColor(color);
int left = 0;
int top = 0;
for (int i = 0; i < 9; i++)
{
top = (i + 1) * 12;
if (i % 2 == 0)
{
left = -15;
for (int j = 0; j < 6; j++)
{
left = left + 28;
DrawFlag.DrawPentacle(gp, (double) left, (double) top, (double) 8, 0);
}
}
else
{
left = -2;
for (int j = 0; j < 5; j++)
{
left = left + 28;
DrawFlag.DrawPentacle(gp, (double) left, (double) top, (double) 8, 0);
}
}
}
color = new java.awt.Color(0, 0, 0);
gp.setColor(color);
java.awt.Font font = new java.awt.Font("宋体", java.awt.Font.CENTER_BASELINE, 12);
gp.setFont(font);
gp.drawString("这些星好像有点怪", 300, 200);
javax.imageio.ImageIO.write(bufferedImage, "jpg", new java.io.File("flag.jpg"));
}
public static void DrawPentacle(java.awt.Graphics gp, double x, double y, double r, int a)
{
int A;
double R, X, Y;
double[] _X = new double[11];
double[] _Y = new double[11];
int[] _x = new int[3];
int[] _y = new int[3];
a = a + 90;
R =Math.sin(Math.toRadians((double) 18)) * r / Math.sin(Math.toRadians((double) 126));
for (int i = 0; i < 5; i++)
{
A = a + 72 * i;
X = R * java.lang.Math.cos(java.lang.Math.toRadians((double) A)) + x;
Y = R * java.lang.Math.sin(java.lang.Math.toRadians((double) A)) + y;
_X[i * 2] = X;
_Y[i * 2] = Y;
A = a + 72 * i + 36;
X = r * java.lang.Math.cos(java.lang.Math.toRadians((double) A)) + x;
Y = r * java.lang.Math.sin(java.lang.Math.toRadians((double) A)) + y;
_X[i * 2 + 1] = X;
_Y[i * 2 + 1] = Y;
}
_X[10] = x;
_Y[10] = y;
for (int i = 0; i < 5; i++)
{
_x[0] = DrawFlag.round(_X[i * 2], 0);
_x[1] = DrawFlag.round(_X[i * 2 + 1], 0);
_x[2] = DrawFlag.round(_X[10], 0);
_y[0] = DrawFlag.round(_Y[i * 2], 0);
_y[1] = DrawFlag.round(_Y[i * 2 + 1], 0);
_y[2] = DrawFlag.round(_Y [10], 0);
gp.fillPolygon(_x, _y, 3);
_x[0] = DrawFlag.round(_X[i * 2 + 1], 0);
_x[1] = DrawFlag.round(_X[(i == 4) ? (0) : (i * 2 + 2)], 0);
_x[2] = DrawFlag.round(_X[10], 0);
_y[0] = DrawFlag.round(_Y[i * 2 + 1], 0);
_y[1] = DrawFlag.round(_Y[(i == 4) ? (0) : (i * 2 + 2)], 0);
_y[2] = DrawFlag.round(_Y[10], 0);
gp.fillPolygon(_x, _y, 3);
}
}
public static int round(double d, int scale)
{
if (scale < 0)
{
scale = 0;
}
java.math.BigDecimal b = new java.math.BigDecimal(java.lang.Double.toString(d));
java.math.BigDecimal one = new java.math.BigDecimal("1");
return b.divide(one, scale, java.math.BigDecimal.ROUND_HALF_UP).intValue();
}
}
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