Mengatur posisi gambar yang ditampilkan, pada JAVA (J2ME)

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

public class AturLayoutGambar extends MIDlet
  implements CommandListener {
   
  private Display display;
  private List list;
  private PosisiGambar form;
 
  private String title = null;

  private final Command cmdKeluar =
    new Command("Keluar", Command.EXIT, 1);
 
  private final Command cmdOK =
    new Command("OK", Command.OK, 1);
 
  public AturLayoutGambar() {
    display = Display.getDisplay(this);
   
    list = new List("Posisi Gambar", Choice.EXCLUSIVE);
    list.append("Kiri", null);
    list.append("Tengah", null);
    list.append("Kanan", null);
       
    list.addCommand(cmdKeluar);
    list.addCommand(cmdOK);
    list.setCommandListener(this);   
  }
   
  public void startApp() {
    display.setCurrent(list);
  }
   
  public void pauseApp() {
  }
   
  public void destroyApp(boolean unconditional) {
  }
   
  public void commandAction(Command c, Displayable s) {
    if (c == cmdKeluar) {
      destroyApp(false);
      notifyDestroyed();
    } else if (c == cmdOK) {
      form = null;
      switch (list.getSelectedIndex()) {
        case 0: {
          form = new PosisiGambar(this, display,"LAYOUT_LEFT",
                   ImageItem.LAYOUT_LEFT);
          break;
        }
        case 1: {
          form = new PosisiGambar(this, display,"LAYOUT_CENTER",
                   ImageItem.LAYOUT_CENTER);   
          break;
        }
        case 2: {
          form = new PosisiGambar(this, display,"LAYOUT_RIGHT",
                   ImageItem.LAYOUT_RIGHT);   
          break;
        }
      }
      display.setCurrent(form);
    }
  }
 
  class PosisiGambar extends Form
    implements CommandListener {
    private AturLayoutGambar midlet;
    private Display display;
    private Image image;
   
    private final Command cmdKembali =
      new Command("Kembali", Command.BACK, 1);  
      
    public PosisiGambar(StudiKasus midlet, Display display,
      String title, int posisi) {
      super(title);
      this.midlet = midlet;
      this.display = display;
      image = null;
      try {
          image = Image.createImage("Java.png");
      } catch (IOException ioe) {
          ioe.printStackTrace();
      }
      ImageItem ii = new ImageItem(null, image, posisi, null);
      append(ii);
      addCommand(cmdKembali);
      setCommandListener(this);
      display.setCurrent(this);
    }
   
    public void commandAction(Command c, Displayable s) {
      if (c == cmdKembali) {
        display.setCurrent(midlet.list);
      }
    }   
  } 
}