java - Checking which raidoButton in a ButtonGroup is selected? -


i created both 2 radiobuttons , buttongroup in swing. "radioascending", "radiodescending", , "buttongroupascdsc" respectively. when "radioascending" selected, array sorted in ascending order, , vice versa. however, when try check if 1 of 2 selected:

if (radioascending.isselected()) {     arrays.sort(alphaarray, (string[] s1, string[] s2) -> s1[0].comparetoignorecase(s2[0]));     alphamodel = new defaulttablemodel (alphaarray, columns); }

the top line gives error:

non-static variable radioascending cannot referenced static context

the code have provided doesn't show much, error looks calling variable radioascending not static (not marked keyword static) method marked static static, not allowed.


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