Java Tutorial/J2ME/ItemStateListener

Use ItemStateListener

   <source lang="java">

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import javax.microedition.lcdui.DateField; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Form; import javax.microedition.lcdui.Item; import javax.microedition.lcdui.ItemStateListener; import javax.microedition.midlet.MIDlet; public class EventEx2 extends MIDlet {

 Display display;
 public EventEx2() {
   display = Display.getDisplay(this);
 }
 public void destroyApp(boolean unconditional) {
   notifyDestroyed();
   System.out.println("App destroyed ");
 }
 public void pauseApp() {
   display = null;
   System.out.println("App paused.");
 }
 public void startApp() {
   Form form = new Form("Change Date");
   ItemStateListener listener = new ItemStateListener() {
     java.util.Calendar cal = java.util.Calendar
         .getInstance(java.util.TimeZone.getDefault());
     public void itemStateChanged(Item item) {
       cal.setTime(((DateField) item).getDate());
       System.out.println("\nDate has changed");
     }
   };
   // register for events
   form.setItemStateListener(listener);
   // get today"s date
   java.util.Date now = new java.util.Date();
   DateField dateItem = new DateField("Today"s date:", DateField.DATE);
   dateItem.setDate(now);
   // add date to the Form screen
   form.append(dateItem);
   display.setCurrent(form);
 }

}</source>