java - Where to put popup code -

so i'm making gui menu drop downs. wanted have gui create popup window whenever user selects option drop down menu. should put code popup within actionperformed method or make separate method , call somewhere else?

here code:

import java.awt.container; import java.awt.flowlayout; import java.awt.event.actionevent; import java.awt.event.actionlistener;  import javax.swing.japplet; import javax.swing.jframe; import javax.swing.jmenu; import javax.swing.jmenubar; import javax.swing.jmenuitem; import javax.swing.jtextfield;  public class finalgui2 extends japplet{ private jtextfield text = new jtextfield(10);  private actionlistener listen = new actionlistener(){     public void actionperformed(actionevent e){      } };  private jmenu[] menu = {new jmenu("food"), new jmenu("fluid"), new     jmenu("sleep")};  private jmenuitem[] items = {new jmenuitem("add"), new jmenuitem("add"), new jmenuitem("add"),         new jmenuitem("edit"), new jmenuitem("edit"), new jmenuitem("edit"),         new jmenuitem("delete"), new jmenuitem("delete"), new jmenuitem("delete")};  public void init(){     for(int = 0; < items.length; i++){         items[i].addactionlistener(listen);         menu[i%3].add(items[i]);     }     jmenubar bar = new jmenubar();     for(int = 0; < menu.length; i++)         bar.add(menu[i]);     setjmenubar(bar);     container contain = getcontentpane();     contain.setlayout(new flowlayout());     contain.add(text); }  public static void main(string[] args){     run(new finalgui2(), 200, 75); }  public static void run(japplet app, int width, int height){     jframe frame = new jframe();     frame.setdefaultcloseoperation(jframe.exit_on_close);     frame.getcontentpane().add(app);     frame.setsize(width, height);     app.init();     app.start();     frame.setvisible(true); } 

}

in jmenuitem's actionlistener. maybe have @ how use menus, how write action listeners and/or how use actions more details

should put code popup within actionperformed method or make separate method , call somewhere else?

well, that's you. personally, re-usable code, using method or class preferred solution, come down own context , needs