how to access and modify a local variable in enclosing/inner scope?

[dapper valve]

public class CalculatorGui {
    public static void main() {
        String lhsNumber = "0";
        String rhsNumber = "0";
        String operator = "";

                                    btn.addActionListener(new ActionListener() {
                        @Override
                        public void actionPerformed(ActionEvent event) {
                            if (operator == "") {
                                lhsNumber = lhsNumber == "0" ? btn.getText() : lhsNumber + btn.getText();
                            }
                        }
                    });

[outer sparrow]

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[dapper valve]

how do i access and modify lhsNumber inside the btn function

i may have fixed this

YES I FIXED IT