java - how to listen the change the value in textfield or textbox in j2me? -

i want store each character input user. when user presses key, key should store in variable. when user presses other key, must replace value of variable new character in textbox in j2me

yes need listen event itemstatelistener , can handle in itemstatechanged(..) here full code

/*  * change template, choose tools | templates  * , open template in editor.  */  package hello;  import javax.microedition.midlet.*; import javax.microedition.lcdui.*;  /**  * @author jigar  */ public class keyeventlistener extends midlet implements itemstatelistener{      private boolean midletpaused = false;      //<editor-fold defaultstate="collapsed" desc=" generated fields ">     private form form;     private textfield textfield;     //</editor-fold>      /**      * keyeventlistener constructor.      */     public keyeventlistener() {     }      //<editor-fold defaultstate="collapsed" desc=" generated methods ">     //</editor-fold>      //<editor-fold defaultstate="collapsed" desc=" generated method: initialize ">     /**      * initilizes application.      * called once when midlet started. method called before <code>startmidlet</code> method.      */     private void initialize() {         // write pre-initialize user code here          // write post-initialize user code here     }     //</editor-fold>      //<editor-fold defaultstate="collapsed" desc=" generated method: startmidlet ">     /**      * performs action assigned mobile device - midlet started point.      */     public void startmidlet() {         // write pre-action user code here         switchdisplayable(null, getform());         // write post-action user code here     }     //</editor-fold>      //<editor-fold defaultstate="collapsed" desc=" generated method: resumemidlet ">     /**      * performs action assigned mobile device - midlet resumed point.      */     public void resumemidlet() {         // write pre-action user code here          // write post-action user code here     }     //</editor-fold>      //<editor-fold defaultstate="collapsed" desc=" generated method: switchdisplayable ">     /**      * switches current displayable in display. <code>display</code> instance taken <code>getdisplay</code> method. method used actions in design switching displayable.      * @param alert alert temporarily set display; if <code>null</code>, <code>nextdisplayable</code> set      * @param nextdisplayable displayable set      */     public void switchdisplayable(alert alert, displayable nextdisplayable) {         // write pre-switch user code here         display display = getdisplay();         if (alert == null) {             display.setcurrent(nextdisplayable);         } else {             display.setcurrent(alert, nextdisplayable);         }         // write post-switch user code here     }     //</editor-fold>      //<editor-fold defaultstate="collapsed" desc=" generated getter: form ">     /**      * returns initiliazed instance of form component.      * @return initialized component instance      */     public form getform() {         if (form == null) {             // write pre-init user code here             form = new form("form", new item[] { gettextfield() });             form.setitemstatelistener(this);         }         return form;     }     //</editor-fold>      //<editor-fold defaultstate="collapsed" desc=" generated getter: textfield ">     /**      * returns initiliazed instance of textfield component.      * @return initialized component instance      */     public textfield gettextfield() {         if (textfield == null) {             // write pre-init user code here             textfield = new textfield("textfield", null, 32, textfield.any);          }         return textfield;     }     //</editor-fold>      /**      * returns display instance.      * @return display instance.      */     public display getdisplay () {         return display.getdisplay(this);     }      /**      * exits midlet.      */     public void exitmidlet() {         switchdisplayable (null, null);         destroyapp(true);         notifydestroyed();     }      /**      * called when midlet started.      * checks whether midlet have been started , initialize/starts or resumes midlet.      */     public void startapp() {         if (midletpaused) {             resumemidlet ();         } else {             initialize ();             startmidlet ();         }         midletpaused = false;     }      /**      * called when midlet paused.      */     public void pauseapp() {         midletpaused = true;     }      /**      * called signal midlet terminate.      * @param unconditional if true, midlet has unconditionally terminated , resources has released.      */     public void destroyapp(boolean unconditional) {     }      public void itemstatechanged(item item) {         if(item.equals(gettextfield())){             system.out.println("keypressed :) ");         }      }  }