After.java

class Person {
    final String address = makeAddress();

    public String getAddress() {
        return address;
    }

    static String makeAddress() {
        String result = "1, The Crescent\n";
        result += "Codeville";
        return result;
    }
}

Before.java

class Person {
    String address;

    public String getAddress() {
        if (address == null) {
            address = "1, The Crescent\n";
            address += "Codeville";
        }
        return address;
    }
}

Stage1.java

class Person {
    String address;

    public String getAddress() {
        if (address == null) {
            String result = "1, The Crescent\n";
            result += "Codeville";
            address = result;
        }
        return address;
    }
}

Stage2.java

class Person {
    String address;

    public String getAddress() {
        if (address == null) {
            address = makeAddress();
        }
        return address;
    }

    static String makeAddress() {
        String result = "1, The Crescent\n";
        result += "Codeville";
        return result;
    }
}