/**
 * This class reads PARAM tags from its HTML host page and sets
 * the color and label properties of the applet. Program execution
 * begins with the init() method. 
 */
public class Applet1 extends Applet
{
 /**
  * The entry point for the applet. 
  */
 public void init()
 {
  initForm();

  usePageParams();

  // TODO: Add any constructor code after initForm call.
 }

 private final String labelParam = "label";
 private final String backgroundParam = "background";
 private final String foregroundParam = "foreground";

 /**
  * Reads parameters from the applet's HTML host and sets applet
  * properties.
  */
 private void usePageParams()
 {
  final String defaultLabel = "Default label";
  final String defaultBackground = "C0C0C0";
  final String defaultForeground = "000000";
  String labelValue;
  String backgroundValue;
  String foregroundValue;

  /** 
   * Read the <PARAM NAME="label" VALUE="some string">,
   * <PARAM NAME="background" VALUE="rrggbb">,
   * and <PARAM NAME="foreground" VALUE="rrggbb"> tags from
   * the applet's HTML host.
   */
  labelValue = getParameter(labelParam);
  backgroundValue = getParameter(backgroundParam);
  foregroundValue = getParameter(foregroundParam);

  if ((labelValue == null) || (backgroundValue == null) ||
   (foregroundValue == null))
  {
   /**
    * There was something wrong with the HTML host tags.
    * Generate default values.
    */
   labelValue = defaultLabel;
   backgroundValue = defaultBackground;
   foregroundValue = defaultForeground;
  }

  /**
   * Set the applet's string label, background color, and
   * foreground colors.
   */
  label1.setText(labelValue);
  label1.setBackground(stringToColor(backgroundValue));
  label1.setForeground(stringToColor(foregroundValue));
  this.setBackground(stringToColor(backgroundValue));
  this.setForeground(stringToColor(foregroundValue));
 }

 /**
  * Converts a string formatted as "rrggbb" to an awt.Color object
  */
 private Color stringToColor(String paramValue)
 {
  int red;
  int green;
  int blue;

  red = (Integer.decode("0x" + paramValue.substring(0,2))).intValue();
  green = (Integer.decode("0x" + paramValue.substring(2,4))).intValue();
  blue = (Integer.decode("0x" + paramValue.substring(4,6))).intValue();

  return new Color(red,green,blue);
 }

 /**
  * External interface used by design tools to show properties of an applet.
  */
 public String[][] getParameterInfo()
 {
  String[][] info =
  {
   { labelParam, "String", "Label string to be displayed" },
   { backgroundParam, "String", "Background color, format \"rrggbb\"" },
   { foregroundParam, "String", "Foreground color, format \"rrggbb\"" },
  };
  return info;
 }

 Label label1 = new Label();

 /**
  * Intializes values for the applet and its components
  */
 void initForm()
 {
  this.setBackground(Color.lightGray);
  this.setForeground(Color.black);
  label1.setText("label1");
  this.setLayout(new BorderLayout());
  this.add("North",label1);
 }
}

Related files:
TicTacToe.java
ANNPlayer.java
NueralNet.java
HumenPlayer.java
MessageBox.java
TurnDialog.java
Applet1.java

Java Programming

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Logic For Graphs using JFreeChart

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