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J2ME Record Store MIDlet Example

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This is a simple program to record data and print it on the console.

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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Posted on: November 15, 2008

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