disk.java

用java写的一个动画显示汉诺塔移动的程序

/*
 * Disk.java
 *
 * Created on 2007年10月4日, 下午6:06
 *
 * To change this template, choose Tools | Options and locate the template under
 * the Source Creation and Management node. Right-click the template and choose
 * Open. You can then make changes to the template in the Source Editor.
 */

package 汉诺塔;

/**
 *
 * @author baili
 */
import java.awt.*;
import java.awt.geom.*;
import java.awt.font.*;
import java.awt.image.*;

public class Disk extends Button
{
   int number;                 
   boolean 上方有盘=false;
   Color startColor, endColor;
   public Disk(int number)
   {
     this.number=number;
     //setBackground(Color.GREEN);
     startColor=new Color(15*16+5,15*16+5,13*16+12);
     endColor=new Color(13*16+2,6*16+9,1*16+14);
   }
   public boolean get上方有盘()
   {
     return 上方有盘;
   }
  public void set上方有盘(boolean b)
   {
     上方有盘=b;
   } 
  public int getNumber()
   {
    return number;
   }
   public void paint(Graphics g) 
   {
       fillGradient(this, g, startColor, endColor);
   }
   public void fillGradient(Component c, Graphics g, Color start, Color end) {
	Rectangle bounds = this.getBounds();  // How big is the component?
	// Get the red, green, and blue components of the start and end
	// colors as floats between 0.0 and 1.0.  Note that the Color class
	// also works with int values between 0 and 255
	float r1 = start.getRed()/255.0f;
	float g1 = start.getGreen()/255.0f;
	float b1 = start.getBlue()/255.0f;
	float r2 = end.getRed()/255.0f;
	float g2 = end.getGreen()/255.0f;
	float b2 = end.getBlue()/255.0f;
	// Figure out how much each component should change at each y value
	float dr = (r2-r1)/bounds.height;
	float dg = (g2-g1)/bounds.height;
	float db = (b2-b1)/bounds.height;
        
	// Now loop once for each row of pixels in the component
	for(int y = 0; y < bounds.height; y++) {
	    g.setColor(new Color(r1, g1, b1));    // Set the color of the row
            //g2D.setPaint(new GradientPaint(0, 0, Color.BLUE,
				//     bounds.width,bounds.height, Color.MAGENTA, true));
	    g.drawLine(0,y, bounds.width-1,y);  // Draw the row
//            g2D.fillRect(0, 0,bounds.width, bounds.height);
	    r1 += dr; g1 += dg; b1 += db;         // Increment color components
	}
//         Graphics2D g2D=(Graphics2D)g;
//         g2D.setPaint(new GradientPaint(0, 0,new Color(15*16+5,15*16+5,13*16+12), bounds.width,bounds.height,new Color(13*16+2,6*16+9,1*16+14), true));
    }
}