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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