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

public class Head extends MIDlet implements CommandListener {
  Form form;
  TextField tf;
  Command input,output;
  Display dsp;
  static final String DBNAME = "rmsDB";
 String write;

 public void startApp() {
   dsp = Display.getDisplay(this);
   form = new Form("RmsTest");
   tf = new TextField("Строка для записи","xxxxxx",999,TextField.ANY);
   input = new Command("input",Command.OK,1);
   output = new Command("output",Command.BACK,2);
   form.append(tf);
   form.addCommand(input);
   form.addCommand(output);
   form.setCommandListener(this);
   dsp.setCurrent(form);

 }

 public void pauseApp() {
 }

 public void destroyApp(boolean unconditional) {
 }

public void commandAction(Command command, Displayable displayable) {
  if(command == input) {load(); form.append(write);}
  if(command == output) {store(tf.getString());}
}

public void store(String write) 
{ RecordStore recordStore = null;
  try { recordStore = RecordStore.openRecordStore (DBNAME, true);
  ByteArrayOutputStream baos = new ByteArrayOutputStream ();
  DataOutputStream dos = new DataOutputStream (baos);
  dos.writeUTF(write);
  byte[] record = baos.toByteArray();
  recordStore.addRecord (record, 0, record.length);
 } catch (Exception e) { System.out.println("Exception: " + e); }
 System.gc(); }

public void load() {
 try { RecordStore recordStore = RecordStore.openRecordStore (DBNAME, false);
 byte[] record = recordStore.getRecord(1);
 ByteArrayInputStream bais = new ByteArrayInputStream (record);
 DataInputStream dis = new DataInputStream (bais);
 String write="";
 write = dis.readUTF(); 
 } catch (Exception e) { System.out.println ("Exception in loading data: " + e); } 
 System.gc(); }

}