java - Jump to another activity when clicking a item in menu of actionbar in android studio -

this code select items in menu, when user click logout, activity jumps login_activity, when user clicks account, activity jumps account_activity.

@override public boolean onoptionsitemselected(menuitem item) {     switch (item.getitemid()){         case r.id.logout_id:             intent login = new intent(mainpanelactivity.this, loginactivity.class);             login.addflags(intent.flag_activity_clear_top);             startactivity(login);         case r.id.account_id:             intent account =new intent(mainpanelactivity.this,accountactivity.class);             startactivity(account);             default:                 return super.onoptionsitemselected(item);     } } 

however, during testing, no matter click, activity jumps account activity.

if switch order of switch cases

@override public boolean onoptionsitemselected(menuitem item) {     switch (item.getitemid()){         case r.id.account_id:             intent account =new intent(mainpanelactivity.this,accountactivity.class);             startactivity(account);         case r.id.logout_id:             intent login = new intent(mainpanelactivity.this, loginactivity.class);             login.addflags(intent.flag_activity_clear_top);             startactivity(login);              default:                 return super.onoptionsitemselected(item);     } } 

no matter click, activity jumps login_activity. knows why?

you need add break; in each case below. otherwise code execute case satisfies switch condition , each case after until either break; or end of switch reached.

@override public boolean onoptionsitemselected(menuitem item) {     switch (item.getitemid()){         case r.id.account_id:             intent account =new intent(mainpanelactivity.this,accountactivity.class);             startactivity(account);             break;         case r.id.logout_id:             intent login = new intent(mainpanelactivity.this, loginactivity.class);             login.addflags(intent.flag_activity_clear_top);             startactivity(login);             break;         default:             return super.onoptionsitemselected(item);     } }