colorbar.java

This applet illustrates the prediction capabilities of the multi-layer perceptrons. It allows to def

import java.awt.*;
import java.util.*;

class ColorBar extends Panel
{
  final int NUMBER_BARS = 10;
  float background[];

  ColorBar()
  {
    background = new float[NUMBER_BARS];
    float step = 1.0f/(float)NUMBER_BARS;
    for(int i=0;i<NUMBER_BARS; i++)
      background[i] = (float) i * step;
  }

  public void paint(Graphics g)
  {
    Rectangle r = getBounds(); // should be getBounds(); in jdk-1.1.4
    g.setColor(Color.blue);
    g.fillRect(0,0,r.width,r.height);
    int xx=0,yy=0;
    int h;
    if (r.height > r.width)
	 h = r.height/NUMBER_BARS;
    else
      h = r.width/NUMBER_BARS;
    int w = (r.width);
    float step = 1.0f / (float) (NUMBER_BARS);
    for(int x1 = 0; x1 < NUMBER_BARS; x1++)
      {
       g.setColor(new Color(1-background[x1],0,background[x1]));
       if (r.height >= r.width)
          g.fillRect(xx,yy,w,h);
       else
	 g.fillRect(yy,xx,h,w);
       yy += h;
     }

    g.fillRect(xx,yy,w,(int)h);
    g.setColor(Color.white);
    g.drawString("0",2, r.height-5);
    if (r.height >= r.width) g.drawString("1",2, 15);
    else g.drawString ("1",r.width-5,r.height-5);

  }

  public Dimension getPreferredSize ()
    { return new Dimension(120,20); }
}