Source Code : Sort Record Example

Java Is Open Source Programming Language You Can Download From Java and Java Libraries From http://www.oracle.com. Click Here to download
We provide this code related to title for you to solve your developing problem easily. Libraries which is import in this program you can download from http://www.oracle.com. Click Here or search from google with Libraries Name you get jar file related it

Sort Record Example

/*
J2ME: The Complete Reference

James Keogh

Publisher: McGraw-Hill

ISBN 0072227109

*/
//jad file (please verify the jar size)
/*
MIDlet-Name: SortExample
MIDlet-Version: 1.0
MIDlet-Vendor: MyCompany
MIDlet-Jar-URL: SortExample.jar
MIDlet-1: SortExample, , SortExample
MicroEdition-Configuration: CLDC-1.0
MicroEdition-Profile: MIDP-1.0
MIDlet-JAR-SIZE: 100

*/
import javax.microedition.rms.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.*;

public class SortExample extends MIDlet implements CommandListener
{
  private Display display;
  private Alert alert;
  private Form form; 
  private Command exit; 
  private Command start;
  private RecordStore recordstore = null;
  private RecordEnumeration recordEnumeration = null;
  private Comparator comparator = null;
  public SortExample ()
  {
    display = Display.getDisplay(this);
    exit = new Command("Exit", Command.SCREEN, 1);
    start = new Command("Start", Command.SCREEN, 1);
    form = new Form("Mixed RecordEnumeration", null);
    form.addCommand(exit);
    form.addCommand(start);
    form.setCommandListener(this);
  }
  public void startApp()
  {
    display.setCurrent(form);
  }
  public void pauseApp()
  {
  }
  public void destroyApp( boolean unconditional )
  {
  }
  public void commandAction(Command command, Displayable displayable)
  {
    if (command == exit)
    {
      destroyApp(true);
      notifyDestroyed();
    }
    else if (command == start)
    {
      try
      {
        recordstore = RecordStore.openRecordStore(
                      "myRecordStore", true );
      }
      catch (Exception error)
      {
        alert = new Alert("Error Creating", 
             error.toString(), null, AlertType.WARNING); 
        alert.setTimeout(Alert.FOREVER); 
        display.setCurrent(alert);
      }
      try
      {
        String outputData[] = {"Mary", "Bob", "Adam"};
        for (int x = 0; x < 3; x++)
        {
          byte[] byteOutputData = outputData[x].getBytes();
          recordstore.addRecord(byteOutputData, 0, 
                   byteOutputData.length);
        }
      }
      catch ( Exception error)
      {
       alert = new Alert("Error Writing", 
                error.toString(), null, AlertType.WARNING); 
       alert.setTimeout(Alert.FOREVER); 
       display.setCurrent(alert);
      }
      try
      {
        StringBuffer buffer = new StringBuffer();
        Comparator comparator = new Comparator();
        recordEnumeration = recordstore.enumerateRecords(
                          null, comparator, false);
        while (recordEnumeration.hasNextElement())
        {
          buffer.append(new String(recordEnumeration.nextRecord()));
          buffer.append("
");
        }
        alert = new Alert("Reading", buffer.toString() , 
                 null, AlertType.WARNING); 
        alert.setTimeout(Alert.FOREVER); 
        display.setCurrent(alert);
      }
      catch (Exception error)
      {
        alert = new Alert("Error Reading", 
                  error.toString(), null, AlertType.WARNING); 
        alert.setTimeout(Alert.FOREVER); 
        display.setCurrent(alert);
      }
      try
      {
       recordstore.closeRecordStore();
      }
      catch (Exception error)
      {
        alert = new Alert("Error Closing", 
                    error.toString(), null, AlertType.WARNING); 
        alert.setTimeout(Alert.FOREVER); 
        display.setCurrent(alert);
      }
      if (RecordStore.listRecordStores() != null)
      {
        try
        {
          RecordStore.deleteRecordStore("myRecordStore");
          recordEnumeration.destroy();
        }
        catch (Exception error)
        {
         alert = new Alert("Error Removing", 
                error.toString(), null, AlertType.WARNING); 
         alert.setTimeout(Alert.FOREVER); 
         display.setCurrent(alert);
        }
      }      
    }
  }     
}
class Comparator implements RecordComparator
{
  public int compare(byte[] record1, byte[] record2)
  {
    String string1 = new String(record1), 
               string2= new String(record2);
    int comparison = string1.compareTo(string2);
    if (comparison == 0)
      return RecordComparator.EQUIVALENT;
    else if (comparison < 0)
      return RecordComparator.PRECEDES;
    else
      return RecordComparator.FOLLOWS;
  }
}


           
       

Thank with us