Programy v Java 2 - Builder.cz - Informacni server o programovani

import java.applet.*;
import java.awt.*;
import java.lang.*;
import java.util.*;
import java.awt.event.*;

public class hybrid extends Applet
{
    int yAbsPos = 0;
    StringBuffer buffer;
    String myValuesStr, myColorsStr, myBackgroundColorStr;
    Integer myValue, myColor;
    Color myBackgroundColor;

    public hybrid() {
// default contructor must be defined for old Netscape
    } // hybrid - constructor 

    public hybrid(String args[]) {
       if (args.length != 3) return;
       myValuesStr = args[0];
       myColorsStr = args[1];
       myBackgroundColorStr = args[2];
    } // hybrid - constructor

    private Color decodeColor(String s) {
       int val = 0; 
       try {
          if (s.startsWith("0x") || s.startsWith("0X")) {
             val = (Integer.valueOf(s.substring(2), 16)).intValue();
          } else if (s.startsWith("$")) {
             val = (Integer.valueOf(s.substring(1), 16)).intValue();
          } else if (s.startsWith("#")) {
             val = (new Integer(s.substring(1))).intValue(); 
          } else { 
             val = (new Integer(s)).intValue();
          }

          return new Color(val); 
       } catch (NumberFormatException e) {
          addItem("decodeColor Err: " +s);
          return null; 
       } 
    } // decodeColor

    void addItem(String newWord) {
       System.out.println(newWord);
// debug 
/*     buffer = new StringBuffer();
       buffer.append(newWord);
       yAbsPos += 10;
       repaint(); */
    } // addItem

    public void init() { 
       buffer = new StringBuffer(); 
       addItem("initializing... "); 
    } // init

    public void start() {
       addItem("getting Parameters...");
       if (myValuesStr == null) { myValuesStr = getParameter("values"); } 
       if (myColorsStr == null) { myColorsStr = getParameter("colors"); }
       if (myBackgroundColorStr == null) { myBackgroundColorStr = getParameter("background"); }
       myBackgroundColor = decodeColor(myBackgroundColorStr);
    } // start

    public void stop() {
       addItem("stopping... ");
    } // stop

    public void destroy() {
       addItem("preparing for unloading...");
    } // destroy

    public void paint(Graphics g) {
       int xPos = 0;
       int yPos = 0;
       int proc = 0;
       double myWidth = getSize().width *.0090;
       int xPlus = (int) (getSize().width *.05);
       int myHeight = (int) (getSize().height *.20);
       double totalCount = 0.0;

// canvas border & background 
       g.setColor(Color.black); 
       g.drawRect(0, 0, getSize().width, getSize().height);
       if (myBackgroundColorStr == null) { g.setColor(Color.white); }
        else { g.setColor(myBackgroundColor); }
       g.fillRect(0, 0, getSize().width, getSize().height);
       g.setColor(Color.black); 
       yAbsPos = 5;
// canvas scale 
       for (int x = 0; x < 6;x++) { 
          g.drawString(Integer.toString(x *20) +"%", xPlus +(int) (x * 20 * myWidth), (int) (getSize().height *.90));
       } 
// canvas rectangles
       if ((myValuesStr != null) && (myColorsStr != null)) {
          StringTokenizer ColorTokens = new StringTokenizer(myColorsStr, ";");
          StringTokenizer ValueTokens = new StringTokenizer(myValuesStr, ";");
          if (ValueTokens.countTokens() != ColorTokens.countTokens()) { 
             addItem("Err: value\'s count is different from color\'s count"); 
          } else { 
             while (ValueTokens.hasMoreTokens()) {
                totalCount = totalCount + (new Double((ValueTokens.nextToken()).trim())).doubleValue();
             }
             ValueTokens = new StringTokenizer(myValuesStr, ";");
             while (ValueTokens.hasMoreTokens()) { 
                proc = (int) ((new Double((ValueTokens.nextToken()).trim())).doubleValue() * 100 / totalCount * myWidth); // float strToDouble
                g.setColor(Color.black);
                g.drawRect(xPlus +xPos, myHeight, proc, getSize().height - 1 -2*myHeight);
                g.setColor(decodeColor((ColorTokens.nextToken()).trim()));
                g.fillRect(xPlus +xPos, myHeight, proc, getSize().height - 1 -2*myHeight);
                xPos += proc;

             }
          } 
       }

// Draw the current string inside the rectangle.
       g.setColor(Color.black);
       g.drawString(buffer.toString(), 50, 10);
    }

    public static void main(String args[]) {
       if (args.length != 3) {
          System.out.println("Parameters needed"); 
          System.exit(255);
       } 
       Frame f = new Frame("Graph application");
       f.addWindowListener(new WindowAdapter() {
          public void windowClosing(WindowEvent e) {System.exit(0);}
       });
       Applet applet = new hybrid(args); // my contructor
// Applet applet = new hybrid(); // default contructor must be defined for old Netscape
       f.add("Center", applet);
       applet.init();
       applet.start();
       f.pack();
       f.setSize(new Dimension(400,300));
       f.show();
    } // main

} // class hybrid