java - Determine who call stateChanged -

i have few sliders this:

//create slider     jslider speedslider = new jslider(jslider.vertical, min_speed, max_speed, initvalue);     speedslider.addchangelistener(controller);     speedslider.setmajortickspacing(major_tick_spacing);     speedslider.setpaintticks(true);      panel.add(speedslider); 

in view.java class

there controller.java

public class controller implements controllerinterface {      //...      @override     public void statechanged(changeevent e) {         jslider source = (jslider)e.getsource();         if (!source.getvalueisadjusting()) {             int speed = (int)source.getvalue();             if (0 == speed) {                 // stop             }             else {                 model.setspeedbody(speed);             }         }     } } 

the problem can not determine slider event, how it? (controllerinterface extends changelistener)

test value of source:

jslider source = (jslider)e.getsource(); if (source == speedslider) {     ... } else if (source == gearslider) {     ... } 

or add specific listener each slider, each listener notified of changes of 1 slider:

speedslider.addchangelistener(new changelistener() {     @override     public void statechanged(changeevent e) {         ...     } });