Applet with parameters : Applet « Swing JFC « Java

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Java » Swing JFC » Applet 




Applet with parameters
   
//File: applet.html
/*
<applet code="ColorScribble.class"
  codebase="."
  width=400 height=400>
  <param name="foreground" value="FF0000">
  <param name="background" value="CCFFCC">
</applet>

*/

/*
 * Copyright (c) 2000 David Flanagan.  All rights reserved.
 * This code is from the book Java Examples in a Nutshell, 2nd Edition.
 * It is provided AS-IS, WITHOUT ANY WARRANTY either expressed or implied.
 * You may study, use, and modify it for any non-commercial purpose.
 * You may distribute it non-commercially as long as you retain this notice.
 * For a commercial use license, or to purchase the book (recommended),
 * visit http://www.davidflanagan.com/javaexamples2.
 */

import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;

/**
 * A version of the Scribble applet that reads two applet parameters to set the
 * foreground and background colors. It also returns information about itself
 * when queried.
 */
public class ColorScribble extends Applet{
  // Read in two color parameters and set the colors.
  public void init() {
    Color foreground = getColorParameter("foreground");
    Color background = getColorParameter("background");
    if (foreground != null)
      this.setForeground(foreground);
    if (background != null)
      this.setBackground(background);
  }

  public void paint(Graphics g) {
    g.setColor(getForeground());
    g.drawString("Parameter",1010 );

  }

  // Read the specified parameter. Interpret it as a hexadecimal
  // number of the form RRGGBB and convert it to a color.
  protected Color getColorParameter(String name) {
    String value = this.getParameter(name);
    try {
      return new Color(Integer.parseInt(value, 16));
    catch (Exception e) {
      return null;
    }
  }

  // Return information suitable for display in an About dialog box.
  public String getAppletInfo() {
    return "ColorScribble v. 0.03.  Written by David Flanagan.";
  }

  // Return info about the supported parameters. Web browsers and applet
  // viewers should display this information, and may also allow users to
  // set the parameter values.
  public String[][] getParameterInfo() {
    return info;
  }

  // Here's the information that getParameterInfo() returns.
  // It is an array of arrays of strings describing each parameter.
  // Format: parameter name, parameter type, parameter description
  private String[][] info = {
      "foreground""hexadecimal color value""foreground color" },
      "background""hexadecimal color value""background color" } };
}


           
         
    
    
  














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