Java Tutorial/J2ME/CheckBox
Add CheckBoxes to a Form
<source lang="java">
import javax.microedition.lcdui.Choice; import javax.microedition.lcdui.ChoiceGroup; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; 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(); } }
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