creat checkbox menu item attach specifi action object append end menu todo duplic argo menu add check item wai merg param action checkbox menu item ad checkbox menu item check box menu item check item action valu action icon icon icon valu action small icon select valu select check box menu item mi check box menu item icon select select valu mi set horizont text posit swing constant right mi set vertic text posit swing constant center mi set enabl enabl mi add action listen mi 