Conjugate Gradient Method

				
				import java.awt.*;
				import java.awt.image.*;
				import java.net.URL;
				import java.io.*;
				
				public class Lbl extends Panel
				{
				  private int W = 0, H = 0;
				  private int Wtxt = 0, Htxt = 0;
				  private int gap = 5;
				  private String txt;
				
				  private Font plainFont, boldFont;
				  private FontMetrics fmp, fmb;
				  private Toolkit tk;
				  private int leading;
				  private int ascent;
				  private int descent;
				  private int lineHeight;
				  private int charWidth;
				  private Color textColor = Color.black;
				
				  private int cursor_x = 0;
				
				  public void setTextColor( Color c )
				  {
				    textColor = c;
				  }
				
				  public Color getTextColor()
				  {
				    return textColor;
				  }
				
				  public void paint( Graphics g ) {
				    if( txt != null )
				    {
				      int w, h;
				      w = size().width;
				      h = size().height;
				      g.setFont( boldFont );
				      g.setColor( textColor );
				      g.drawString( txt, W + gap, h/2 + ascent/2 );
				      // g.drawLine( W + gap, h/2, w, h/2  );
				      // g.drawLine( W + gap, h/2 + ascent/2, w, h/2 + ascent/2  );
				    }
				  }
				
				  public Lbl()
				  {
				  }
				
				  public Lbl( String s )
				  {
				    setText( s, 12 );
				  }
				
				  public String getText()
				  {
				    return txt;
				  }
				
				  public void setText( String s, int fontSize )
				  {
				    txt = s;
				
				    tk = Toolkit.getDefaultToolkit();
				    // plainFont = new Font( "Courier", Font.PLAIN, fontSize);
				    boldFont = new Font( "Courier", Font.BOLD, fontSize);
				    // fmp = tk.getFontMetrics( plainFont );
				    fmb = tk.getFontMetrics( boldFont );
				    leading = fmb.getLeading();
				    ascent = fmb.getAscent();
				    descent = fmb.getDescent();
				    // System.out.println( "Leading: " + leading );
				    // System.out.println( "Ascent: " + ascent );
				    // System.out.println( "Descent: " + descent );
				    if( txt != null )
				    {
				      Htxt = fmb.getHeight();
				      // System.out.println( "Height: " + Htxt );
				      Wtxt = fmb.stringWidth( txt );
				    }
				  }
				
				  public Dimension minimumSize() {
				    return new Dimension( 2 + W + gap + Wtxt, 2 + Math.max( H, Htxt ) );
				  }
				
				  public Dimension preferredSize() {
				    return minimumSize();
				  }
				
				  public Dimension maximumSize() {
				    return new Dimension( W, H );
				  }
				}