java - How to know what you selected in the JComboBox -

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i making basic calculator app in java has 2 jtextfields , 1 jcombobox. want know if there way let jbutton detect selected in jcombobox, when did text field looked 

 static string divide = "/";  if (n == joptionpane.ok_option) {                 if (symbol.gettext().equals(divide)){                  <code>               }          }

so there similar way jcomboboxs??

string[] symbols = {times, minus, plus, divide};

that's jcombobox's content code.

you can selected item jcombobox method .getselecteditem().

say have string[] symbols = {times, minus, plus, divide}; input when constructing jcombobox (see constructor jcombobox(e[] items) ) 

jcombobox jcb = new jcombobox(symbols);  //you see string selected system.out.println(jcb.getselecteditem());

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