Add CheckBoxes to a Form : CheckBox « J2ME « Java Tutorial

1. Java Tutorial
2. J2ME
3. CheckBox

import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.ChoiceGroup;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.midlet.MIDlet;

public class J2MECheckBoxes extends MIDlet implements CommandListener {
  private Display display;

  private Form form = new Form("Movies");

  private Command exit = new Command("Exit", Command.EXIT, 1);

  private Command process = new Command("Process", Command.SCREEN, 2);

  private ChoiceGroup movies = new ChoiceGroup("Select Movies You Like to See", Choice.MULTIPLE);

  private int movieIndex;

  public J2MECheckBoxes() {
    display = Display.getDisplay(this);
    movies.append("A", null);
    movies.append("R", null);
    movies.append("C", null);
    movies.append("H", null);
    movieIndex = form.append(movies);
    form.addCommand(exit);
    form.addCommand(process);
    form.setCommandListener(this);
  }

  public void startApp() {
    display.setCurrent(form);
  }

  public void pauseApp() {
  }

  public void destroyApp(boolean unconditional) {
  }

  public void commandAction(Command command, Displayable displayable) {
    if (command == process) {
      boolean picks[] = new boolean[movies.size()];
      StringItem message[] = new StringItem[movies.size()];
      movies.getSelectedFlags(picks);
      for (int x = 0; x < picks.length; x++) {
        if (picks[x]) {
          message[x] = new StringItem("", movies.getString(x) + "\n");
          form.append(message[x]);
        }
      }
      form.delete(movieIndex);
      form.removeCommand(process);
    } else if (command == exit) {
      destroyApp(false);
      notifyDestroyed();
    }
  }
}

31.7.CheckBox
	31.7.1.	Add CheckBoxes to a Form