ActionListener java swing -

i have being trying create window using swing ad have put buttons on right side that's why used boxlayout can't find way use actionlistener on button have. that's program working on:

public class fenetre2 extends jframe {  private jsplitpane splitpan=null;      public fenetre2 (){         jpanel pan = new jpanel ();          // caracteristique fenetre          this.settitle("gestion employe");         this.setsize(800, 400);         this.setlocationrelativeto(null);         this.setdefaultcloseoperation(jframe.exit_on_close);         pan.setbackground(color.white);         this.setcontentpane(pan);         // add button           container c = getcontentpane();         c.setlayout( new borderlayout( 30, 30 ) );         box boxes[] = new box[ 4 ];         boxes[ 0 ] = box.createhorizontalbox();         boxes[ 1 ] = box.createverticalbox();         boxes[ 2 ] = box.createhorizontalbox();         boxes[ 3 ] = box.createverticalbox();         // create strut , add buttons boxes[ 1 ]         boxes[ 1 ].add( new jbutton( "ajouter" ) );         boxes[ 1 ].add( new jbutton( "suprimer" ) );         boxes[ 1 ].add( new jbutton( "afficher" ) );         c.add( boxes[ 1 ], borderlayout.east );         //tree         defaultmutabletreenode root = new defaultmutabletreenode("structure employe");         //create child nodes         defaultmutabletreenode pdgnode = new defaultmutabletreenode("pdg");         defaultmutabletreenode departement1node = new defaultmutabletreenode("departement 1");         departement1node.add(new defaultmutabletreenode("chef departement"));         departement1node.add(new defaultmutabletreenode("employee1"));         departement1node.add(new defaultmutabletreenode("employee2"));         departement1node.add(new defaultmutabletreenode("employee3"));           //add child nodes root node         root.add(pdgnode);         pdgnode.add(departement1node);         jtree tree = new jtree(root);         this.add(tree);         jscrollpane scroll=new jscrollpane(tree);         splitpan=new jsplitpane(jsplitpane.horizontal_split,scroll,new jlabel("aaaaa"));         splitpan.setsize(this.getmaximumsize());         add(splitpan);          this.setvisible(true);               }     public static void main (string args []){          fenetre2 fen = new fenetre2();     } } 

you should not add buttons directly panel instead instantiate them , add actionlistener them or whatever else want them. example:

jbutton ajouterbutton = new jbutton("ajouter"); ajouterbutton.addactionlistener(new actionlistener() {     @override     public void actionperformed(actionevent event) {         // code goes here     } }); 

then can add button array:

boxes[1].add(ajouterbutton); 

then same thing buttons.