t.java

class HelloWorld {
    public static String getString(String key, String def) {
        String cs = null;
        Boolean containsKey = true;
        return cs != null || containsKey ? cs == null ? null : cs.toString() : def;
    }
    
    public static String getString2(String key, String def) {
        Boolean containsKey = true;
        if (!containsKey) {
            return def;
        }
        String cs = null;
        
        return cs == null ? null : cs.toString();
    }

    public static void main(String[] args) {
        System.out.println(getString("Hello", "World!"));
    }
}