swing - Random Image in Java -

how make random image appear when click button? need add view images change when click button

class buttonlistener:

public class buttonlistener implements actionlistener {      private model mod;     public buttonlistener(model _m){         mod = _m;     }      @override     public void actionperformed(actionevent e) {         int x = mod.random();         if (x == 1) {             jlabel l1 = new jlabel();             jlabel l2 = new jlabel();             jlabel l3 = new jlabel();             l1.seticon(new imageicon ("images/green.png"));             system.out.println("1");         }         else if (x == 2) {             jlabel l1 = new jlabel();             l1.seticon(new imageicon("images/purple.png"));             system.out.println("2");         }         else {             jlabel l1 = new jlabel();             l1.seticon(new imageicon("images/red.png"));             system.out.println("3");         }     } } 

class view:

public class view {      public view() {         model _m = new model();         jframe f = new jframe("....");         jpanel p = new jpanel(new gridlayout(2, 3));         jlabel l1 = new jlabel();         jlabel d = new jlabel();         jlabel l2 = new jlabel();         jlabel l3 = new jlabel();         jbutton b = new jbutton("spin");          p.add(l2);         p.add(l3);         p.add(l1);         p.add(d);         p.add(b);         b.addactionlistener(new buttonlistener(_m));         f.add(p);         f.pack();         f.setvisible(true);         f.setdefaultcloseoperation(jframe.exit_on_close);     } } 

class model:

public class model {      public model(){     }      public int random(){     random rand = new random();         return rand.nextint(4);     } } 

your code appears trying create m-v-c program, , if so, model needs

1. state (i.e., field or fields)
2. ability accept , notify listeners of change when 1 of "bound" fields changes, view can notified, either directly (e.g., view has listener registered model) or indirectly (e.g., controller has listener registered model, , when notified -- controller -- changes view).

when i've done this, i've given model swingpropertychangesupport field methods allow other classes add , remove propertychangelisteners support object. bound fields, here field representing random int, has setter method, , within method, have support object notify listeners holds calling 1 of firepropertychange(...) methods.

for example, please check out answer similar question here: using jfilechooser swing gui classes , listeners