J2ME Record Store MIDlet Example

This is a simple program to record data and print it on the console. In this example we are using the following code to open, close and delete the record:

RecordStore r_store;
r_store = RecordStore.openRecordStore("Sandeep Kumar Suman", true );
r_store.closeRecordStore();
RecordStore.deleteRecordStore("Sandeep Kumar Suman");

And the Application is as follows:

Source Code of RecordStoreMIDlet.java


import java.io.*;

import javax.microedition.midlet.*;

import javax.microedition.lcdui.*;

import javax.microedition.rms.*;



public class RecordStoreMIDlet extends MIDlet implements CommandListener{

  private Display display;

  private Alert alert;

  private Form form; 

  private Command exit, start, close; 

  private RecordStore r_store;

  private Image image;

      

  public void startApp(){

    try{image = Image.createImage("/error.png");}catch(Exception e){}

    display = Display.getDisplay(this);

    start = new Command("Start", Command.SCREEN, 1);

    close = new Command("Close", Command.SCREEN, 1);

    exit = new Command("Exit", Command.SCREEN, 1);  

    form = new Form("Record Store");

    form.addCommand(start);

    form.addCommand(close);

    form.addCommand(exit);

    form.setCommandListener(this);

    display.setCurrent(form);

  }



  public void pauseApp(){}



  public void destroyApp(boolean unconditional){

    notifyDestroyed();

  }



  public void commandAction(Command c, Displayable displayable){

    String label = c.getLabel();

    if(label.equals("Start")){

      try{

        r_store = RecordStore.openRecordStore("Sandeep Kumar Suman", true );

        String name = r_store.getName();

        System.out.println("Name: "+name);

      }catch (Exception error){

        alert = new Alert("Exception", error.toString(), image, 

        AlertType.WARNING); 

        alert.setTimeout(Alert.FOREVER); 

        display.setCurrent(alert);

      }            

    }else if(label.equals("Close")){

      try{

        r_store.closeRecordStore();

        System.out.println("Successfully Closed Record");

      }catch (Exception error){

        alert = new Alert("Exception", error.toString(), image, 

        AlertType.WARNING); 

        alert.setTimeout(Alert.FOREVER); 

        display.setCurrent(alert);

      }

    }else if (RecordStore.listRecordStores() != null){

      try{

        RecordStore.deleteRecordStore("Sandeep Kumar Suman");

        System.out.println("Successfully Deleted The Record");

      }catch (Exception error){

        alert = new Alert("Exception", error.toString(), image, 

        AlertType.WARNING); 

        alert.setTimeout(Alert.FOREVER); 

        display.setCurrent(alert);

      }

    } else if(label.equals("Exit")){

      destroyApp(true);

    }

  }     

}

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