从RecordStore获取记录

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.rms.RecordStore;
import javax.microedition.rms.RecordStoreNotFoundException;

public class getRecordMIDlet extends MIDlet implements CommandListener {
  private Command exitCommand = new Command("exit", Command.STOP, 1);

  private Display display;

  public getRecordMIDlet() {
    display = Display.getDisplay(this);
  }

  public void startApp() {
    TextBox aTextBox = new TextBox("Main", null, 256, TextField.ANY);
    RecordStore rs = null;
    boolean existingOrNot = false;
    existingOrNot = existing("aRS");
    if (existingOrNot) {
      try {
        rs = RecordStore.openRecordStore("aRS", false);
      } catch (Exception e) {
      }
    } else {
      try {
        rs = RecordStore.openRecordStore("aRS", true);
      } catch (Exception e) {
      } finally {
      }
    }

    try {
      String record = "";
      for (int i = 1; i < rs.getNextRecordID(); i++) {
        record = new String(rs.getRecord(i));
      }
      aTextBox.setString(record);
    } catch (Exception e) {
      aTextBox.setString("Failed");
      try {
        rs.closeRecordStore();
        RecordStore.deleteRecordStore("aRS");
      } catch (Exception x) {
      }
    }

    try {
      rs.closeRecordStore();
    } catch (Exception e) {
    }

    aTextBox.addCommand(exitCommand);
    aTextBox.setCommandListener(this);
    display.setCurrent(aTextBox);
  }

  public void pauseApp() {
  }

  public void destroyApp(boolean unconditional) {
  }

  public boolean existing(String recordStoreName) {
    boolean existingOrNot = false;
    RecordStore rs = null;
    if (recordStoreName.length() > 32)
      return false;
    try {
      rs = RecordStore.openRecordStore(recordStoreName, false);
    } catch (RecordStoreNotFoundException e) {
      existingOrNot = false;
    } catch (Exception e) {
    } finally {
      try {
        rs.closeRecordStore();
      } catch (Exception e) {
      }
    }
    return existingOrNot;
  }

  public void commandAction(Command c, Displayable s) {
    destroyApp(false);
    notifyDestroyed();
  }
}