Question

boolean hasTaxes(){
        return !state.equalsIgnoreCase("TX" || "NM" ||"VA" || "AZ" || "AK");
    }

In the above code, I got The operator || is undefined for the argument type(s) java.lang.String, java.lang.String error… so does that mean || operator cannot be used in equalsIgnoreCase() argument?

Answer 1

You are trying to use the || operator on a string which doesn’t work. Try this instead

return !state.equalsIgnoreCase("TX") &&
!state.equalsIgnoreCase("NM" ) &&
!state.equalsIgnoreCase("VA") &&
!state.equalsIgnoreCase("AZ" ) &&
!state.equalsIgnoreCase("AK");

You have to use the || operator with booleans, which are what are returned by the equalsIgnoreCase method.