Java: Accessing private fields through reflection

You use Class.getDeclaredField and AccessibleObject.setAccessible as follows:

class C {
    private String privateField = "Hello World";
}

class Example {
    public static void main(String[] args) throws Exception {
        C obj = new C();
        Field f = C.class.getDeclaredField("privateField");
        f.setAccessible(true);
        String str = (String) f.get(obj);
        System.out.println(str); // "Hello World"
    }
}