Zone 817

/**
 *PUBLIC SOFTWARE
 *
 *This source code has been placed in the public domain. You can use, modify, and distribute
 *the source code and executable programs based on the source code.
 *
 *However, note the following:
 *
 *DISCLAIMER OF WARRANTY
 *
 * This source code is provided "as is" and without warranties as to performance
 * or merchantability. The author and/or distributors of this source code may
 * have made statements about this source code. Any such statements do not constitute
 * warranties and shall not be relied on by the user in deciding whether to use
 * this source code.This source code is provided without any express or implied
 * warranties whatsoever. Because of the diversity of conditions and hardware
 * under which this source code may be used, no warranty of fitness for a
 * particular purpose is offered. The user is advised to test the source code
 * thoroughly before relying on it. The user must assume the entire risk of
 * using the source code.
 * 
 */

import com.google.gwt.user.client.Element;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.Event.NativePreviewEvent;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HorizontalPanel;

/**
 * @author amal
 * @version 1.0
 */
public class MyDialog extends DialogBox
  {

    HTML close = new HTML("[X]");
    HTML title =new HTML("");
    HorizontalPanel captionPanel = new HorizontalPanel();

    public MyDialog(boolean autoHide, boolean modal)
      {
        super(autoHide, modal);
        Element td = getCellElement(0, 1);
        DOM.removeChild(td, (Element) td.getFirstChildElement());
        DOM.appendChild(td, captionPanel.getElement());
        captionPanel.setStyleName("Caption");//width-100%
        captionPanel.add(title);
        close.addStyleName("CloseButton");//float:right
        captionPanel.add(close);
        super.setGlassEnabled(true);
        super.setAnimationEnabled(true);
      }
    public MyDialog(boolean autoHide)
      {
        this(autoHide, true);
      }
    public MyDialog()
      {
        this(false);
      }

     @Override
    public String getHTML()
      {
        return this.title.getHTML();
      }

    @Override
    public String getText()
      {
        return this.title.getText();
      }

    @Override
    public void setHTML(String html)
      {
        this.title.setHTML(html);
      }

    @Override
    public void setText(String text)
      {
        this.title.setText(text);
      }

    @Override
    protected void onPreviewNativeEvent(NativePreviewEvent event)
      {
        NativeEvent nativeEvent = event.getNativeEvent();

        if (!event.isCanceled()
          && (event.getTypeInt() == Event.ONCLICK)
          && isCloseEvent(nativeEvent))
          {
            this.hide();
          }
        super.onPreviewNativeEvent(event);
      }

    private boolean isCloseEvent(NativeEvent event)
      {
        return event.getEventTarget().equals(close.getElement());//compares equality of the underlying DOM elements
      }
  }

@Override
      protected void onPreviewNativeEvent(NativePreviewEvent event)
      {
         if (!event.isCanceled() && 
             event.getTypeInt() == Event.ONKEYDOWN && 
             event.getNativeEvent().getKeyCode() == KeyCodes.KEY_ESCAPE)
        {
             this.hide();
        }
       super.onPreviewNativeEvent(event);
     }

try 
{
    XMLEncoder enc= new XMLEncoder(new BufferedOutputStream(
        new FileOutputStream("<output xml file>")));
    enc.writeObject(instance);//instance is the bean object to be serialized
    enc.close();
} 
catch (FileNotFoundException e) 
{
}

File file = new File("<directory path>");
try 
{
    URL url = file.toURL();    
    ClassLoader loader= new URLClassLoader(new URL[]{url});
    Class class= loader.loadClass("<class name>");
} 
catch (MalformedURLException e) 
{
}
 catch (ClassNotFoundException e)
{
 }

public class Singleton implements Serializable
{
 static Singleton instance= new Singleton ();

private Singleton ()
 {
 }

protected Object readResolve() 
 {
  return instance;
 }

}

Integer a=127;
Integer b=127;
System.out.println(a==b);//prints true
a=128;
b=128;
System.out.println(a==b);//prints false