利用Java Applet编程实现动画特技 - 编程入门网
作者 佚名技术
来源 NET编程
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发布时间 2012-06-23
"),16))); } catch (Exception E) { } try { handColor = new Color(Integer.parseInt(getParameter("fgcolor1"),16)); } catch (Exception E) { } try { numberColor = new Color(Integer.parseInt(getParameter("fgcolor2"),16)); } catch (Exception E) { } resize(300,300); // 设置时钟窗口大小 } // 计算四分之一的圆弧 public void plotpoints(int x0, int y0, int x, int y, Graphics g) { g.drawLine(x0+x,y0+y,x0+x,y0+y); g.drawLine(x0+y,y0+x,x0+y,y0+x); g.drawLine(x0+y,y0-x,x0+y,y0-x); g.drawLine(x0+x,y0-y,x0+x,y0-y); g.drawLine(x0-x,y0-y,x0-x,y0-y); g.drawLine(x0-y,y0-x,x0-y,y0-x); g.drawLine(x0-y,y0+x,x0-y,y0+x); g.drawLine(x0-x,y0+y,x0-x,y0+y); } // 用Bresenham算法来画圆,其中(x0,y0)是圆的中心,r为圆半径 public void circle(int x0, int y0, int r, Graphics g) { int x,y; float d; x=0; y=r; d=5/4-r; plotpoints(x0,y0,x,y,g); while (y>x) { if (d<0) { d=d+2*x+3; x++; } else { d=d+2*(x-y)+5; x++; y--; } plotpoints(x0,y0,x,y,g); } } public void paint(Graphics g) { int xh, yh, xm, ym, xs, ys, s = 0, m = 10, h = 10, xcenter, ycenter; String today; currentDate = new Date(); SimpleDateFormat formatter = new SimpleDateFormat("s",Locale.getDefault()); try { s = Integer.parseInt(formatter.format(currentDate)); } catch (NumberFormatException n) { s = 0; } formatter.applyPattern("m"); try { m = Integer.parseInt(formatter.format(currentDate)); } catch (NumberFormatException n) { m = 10; } formatter.applyPattern("h"); try { h = Integer.parseInt(formatter.format(currentDate)); } catch (NumberFormatException n) { h = 10; } formatter.applyPattern("EEE MMM dd HH:mm:ss yyyy"); today = formatter.format(currentDate); //设置时钟的表盘的中心点为(80,55) xcenter=80; ycenter=55; // a= s* pi/2 - pi/2 (to switch 0,0 from 3:00 to 12:00) // x = r(cos a) + xcenter, y = r(sin a) + ycenter xs = (int)(Math.cos(s * 3.14f/30 - 3.14f/2) * 45 + xcenter); ys = (int)(Math.sin(s * 3.14f/30 - 3.14f/2) * 45 + ycenter); xm = (int)(Math.cos(m * 3.14f/30 - 3.14f/2) * 40 + xcenter); ym = (int)(Math.sin(m * 3.14f/30 - 3.14f/2) * 40 + ycenter); xh = (int)(Math.cos((h*30 + m/2) * 3.14f/180 - 3.14f/2) * 30 + xcenter); yh = (int)(Math.sin((h*30 + m/2) * 3.14f/180 - 3.14f/2) * 30 + ycenter); //画时钟最外面的圆盘其中心在(xcenter,ycenter)半径为50 g.setFont(clockFaceFont); g.setColor(handColor); circle(xcenter,ycenter,50,g); //画时钟表盘里的数字 g.setColor(numberColor); g.drawString("9",xcenter-45,ycenter+3); g.drawString("3",xcenter+40,ycenter+3); g.drawString("12",xce |
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