java - can't added my object to to ArrayList -

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i tried add object arraylist ? ican't whyyyyyy ? 

arraylist<patient> emer;   patient p = new patient();   p.setname(jtextfield1.gettext()); p.setsurname(jtextfield2.gettext()); p.setgender(jradiobutton1.gettext()); } p.setbooldtype(jcombobox1.getselecteditem() + ""); p.setentarnceday(jcombobox2.getselecteditem() + "/" + jcombobox3.getselecteditem() + "/" + jcombobox4.getselecteditem()); p.setfee(integer.parseint(jtextfield8.gettext()));  emer.add(p);

you haven't initialized emer , getting "local variable not initialized" error.

arraylist<patient> emer;

what need initialize emer new array list instance.

arraylist<patient> emer = new arraylist<patient>();

or better yet:

list<patient> emer = new arraylist<patient>();

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