ledpanel.java

这又是一个专家系统. 是用java写的. 初学者可看看此程序.个人觉得还不错.

/** LedPanel is an JComponent widget, written for use in the application ocrdemo.
 * It simulates a rectangular LED  which displays information via brightness.
 */


public class LedPanel extends javax.swing.JComponent{
    private int boundwidth, boundheight;
    private int viswidth, visheight;
    private float hue, sat, bright;
    
    /** The default constructor. Creates a 40x40 LedPanel widget, with a "visible"
dimension of 40x20 centered in the middle. The color is red, with 90%
saturation.
@returns LedPanel object
     */
    public LedPanel() {
	this(40, 40, 40, 20, 0.01f, 0.9f);
    }
    
    /**The main constructor.
@param tboundwidth The width (in pixels) of the widget.
@param tboundheight The height (in pixels) of the widget.
@param tviswidth The width (in pixels) of the actual light.
@param tvisheight The height (in pixels) of the actual light.
@param thue The hue of the LedPanel. Ranges from 0.0 (red) to 1.0 (violet)
@param tsat The saturation of the LedPanel. Ranges from 0.0 (grayish) to 1.0
(fully saturated).
@return LedPanel object with the given properties.
     */
    public LedPanel(int tboundwidth, int tboundheight,
    int tviswidth, int tvisheight, float thue, float tsat) {
	
	super();
	this.boundwidth = tboundwidth;
	this.boundheight = tboundheight;
	this.viswidth = tviswidth;
	this.visheight = tvisheight;
	this.hue = thue;
	this.sat = tsat;
	bright = 0;
	//reshape(0,0,boundwidth,boundheight);
	setPreferredSize( new java.awt.Dimension(boundwidth, boundheight) );

    }
    
    /**Sets the brightness of the LedPanel.
@param tbright Brightness, ranging from 0.0 to 1.0.
     */
    public void setLED(double tbright) {
	this.bright = (float)tbright;
	repaint();
    }
    
    public void paintComponent(java.awt.Graphics g) {
	g.setColor(java.awt.Color.getHSBColor(hue,sat,bright));
	g.fill3DRect(((boundwidth-viswidth)/2),((boundheight-visheight)/2),
	    viswidth,visheight,true);
    }
}