example17_19.java

不错的教程 适合中高级人员的使用

import java.awt.*;import java.awt.event.*;
import java.awt.geom.*;
import java.applet.*;
public class Example17_19 extends Applet 
{  public void paint(Graphics g)
   {  Graphics2D  g_2d=(Graphics2D)g;
      //花叶两边的曲线:  
      QuadCurve2D
      curve_1=new  QuadCurve2D.Double(200,200,150,160,200,100);
      CubicCurve2D curve_2=
      new  CubicCurve2D.Double(200,200,260,145,190,120,200,100); 
      //花叶中的纹线:
      Line2D line=new Line2D.Double(200,200,200,110);  
      QuadCurve2D leaf_line1=
      new  QuadCurve2D.Double(200,180,195,175,190,170);
      QuadCurve2D leaf_line2=
      new  QuadCurve2D.Double(200,180,210,175,220,170); 
      QuadCurve2D leaf_line3=
      new  QuadCurve2D.Double(200,160,195,155,190,150);
      QuadCurve2D leaf_line4=
      new  QuadCurve2D.Double(200,160,214,155,220,150);   
      //利用旋转来绘制花朵:  
      AffineTransform trans=new AffineTransform();
      for(int i=0;i<6;i++)
       {  trans.rotate(60*Math.PI/180,200,200);
          g_2d.setTransform(trans); 
          GradientPaint gradient_1=
  new GradientPaint(200,200,Color.green,200,100,Color.yellow);
          g_2d.setPaint(gradient_1);
          g_2d.fill(curve_1);
          GradientPaint gradient_2=new
  GradientPaint(200,145,Color.green,260,145,Color.red,true);
          g_2d.setPaint(gradient_2);
          g_2d.fill(curve_2);
          Color c3=new Color(0,200,0); g_2d.setColor(c3); 
          g_2d.draw(line); 
          g_2d.draw(leaf_line1); g_2d.draw(leaf_line2);  
          g_2d.draw(leaf_line3); g_2d.draw(leaf_line4);
        }
    //花瓣中间的花蕾曲线:
      QuadCurve2D center_curve_1=
  new   QuadCurve2D.Double(200,200,190,185,200,180);
      AffineTransform trans_1=new AffineTransform(); 
      for(int i=0;i<12;i++)
        {  trans_1.rotate(30*Math.PI/180,200,200);
           g_2d.setTransform(trans_1); 
           GradientPaint gradient_3=
           new GradientPaint(200,200,Color.red,200,180,Color.yellow);
             g_2d.setPaint(gradient_3);
             g_2d.fill(center_curve_1); 
         }
       //再绘制一个0.4倍的花朵:
       AffineTransform trans_2=new AffineTransform();
       trans_2.scale(0.4,0.4); 
       for(int i=0;i<6;i++)
         {  trans_2.rotate(60*Math.PI/180,200,200);
            g_2d.setTransform(trans_2);g_2d.setColor(Color.pink);
            g_2d.fill(curve_1);g_2d.setColor(Color.green);
            g_2d.fill(curve_2);
         }
    }
}