java - How to create hover on JLabel to show Menubar? -

how make show menu bar upon user hovered cursor on jlabel? i'm little bit confused mouseevent, etc. here code:

public class menupage extends jframe implements actionlistener {     private jlabel fshirts, tshirts, sweater, jeans, shoes, hats, bags;     private jbutton btncart, btnexit;     private jpanel leftpane, rightpane;     private container cont;      public menupage()     {         super ("menu");         cont = getcontentpane();         cont.setlayout (new borderlayout());          fshirts = new jlabel ("formal shirts", swingconstants.center);         tshirts = new jlabel ("t - shirts", swingconstants.center);         sweater = new jlabel ("sweater", swingconstants.center);         jeans = new jlabel ("jeans", swingconstants.center);         shoes = new jlabel ("shoes", swingconstants.center);         hats = new jlabel ("hats", swingconstants.center);         bags = new jlabel ("bags", swingconstants.center);          btncart = new jbutton ("cart");         btnexit = new jbutton ("exit");          leftpane = new jpanel();         leftpane.setlayout (new gridlayout (9,1));         leftpane.setborder (new titledborder ("menus"));            cont.add (leftpane, borderlayout.west);          leftpane.add (fshirts);         leftpane.add (tshirts);         leftpane.add (sweater);         leftpane.add (jeans);         leftpane.add (shoes);         leftpane.add (hats);         leftpane.add (bags);         leftpane.add (btncart);         leftpane.add (btnexit);          leftpane.setopaque (true);          btncart.addactionlistener(this);         btnexit.addactionlistener(this);          pack();         setlocationrelativeto(null);         setvisible(true);         setdefaultcloseoperation(exit_on_close);         validate();     }      public void actionperformed(actionevent menu)     {         {             if (menu.getsource() == btncart)             {                 dispose();             }              else if (menu.getsource() == btnexit)             {                 dispose();                 new welcomepage();             }         }     }      public static void main(string args[])     {         menupage wp = new menupage();     } } 

how make label show menu bar when user hovered cursor on each of label?

simply implement mouselistener (or mouseadapter, handy) :

 fshirts.addmouselistener(new mouseadapter() {         @override         public void mouseexited(mouseevent e) {             system.out.println("hide menu");         }          @override         public void mouseentered(mouseevent e) {             system.out.println("show menu");         }     }); 

by way, code structure cleaner (unless actually need reference on labels, doubt) :

public class menupage extends jframe implements actionlistener {     private jbutton                     btncart, btnexit;     private jpanel                      leftpane, rightpane;     private container                   cont;      private static final list<string>   labels_text = arrays.aslist("formal shirts","t - shirts", //                                                             "sweater","jeans","hats","bags");      public menupage() {         super("menu");         cont = getcontentpane();         cont.setlayout(new borderlayout());          leftpane = new jpanel();         leftpane.setlayout(new gridlayout(9,1));         leftpane.setborder(new titledborder("menus"));          list<jpopupmenu> popmenus = buildpopmenus();         (int i=0 ; i<labels_text.size() ; i++) {             final int j = i;             jlabel label = new jlabel(labels_text.get(i),swingconstants.center);             label.addmouselistener(new mouseadapter() {                 @override                 public void mouseexited(mouseevent e) {                     popmenus.get(j).setvisible(false);                 }                  @override                 public void mouseentered(mouseevent e) {                     point loc = label.getlocationonscreen();                     loc.translate(label.getwidth(),label.getheight());                     popmenus.get(j).setlocation(loc);                     popmenus.get(j).setvisible(true);                 }             });             leftpane.add(label);         }          btncart = new jbutton("cart");         btnexit = new jbutton("exit");          cont.add(leftpane,borderlayout.west);         leftpane.setopaque(true);          btncart.addactionlistener(this);         btnexit.addactionlistener(this);          pack();         setlocationrelativeto(null);         setvisible(true);         setdefaultcloseoperation(exit_on_close);         validate();     }      private list<jpopupmenu> buildpopmenus() {         return labels_text.stream().map(text -> {              jpopupmenu popmenu = new jpopupmenu();             popmenu.add(new jmenuitem(text));             return popmenu;         })         .collect(collectors.tolist());     }      public void actionperformed(actionevent menu) {         if (menu.getsource() == btncart) {             dispose();         }          else if (menu.getsource() == btnexit) {             dispose();             // new welcomepage();         }     }      public static void main(string args[]) {         menupage wp = new menupage();     } }