ReSetFinalFields.java

ReSetFinalFields.java

public class ReSetFinalFields {

    static class Final {
        public final String name;

        public Final() {
            this(null);
        }

        public Final(String name) {
            this.name = name;
        }

        @Override
        public String toString() {
            return "Final{" +
                    "name='" + name + '\'' +
                    '}';
        }
    }

    public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
        Final finalObject = new Final("final");
        System.out.println(finalObject);
        Field fieldName = Final.class.getDeclaredField("name");
        fieldName.setAccessible(true);
        // Field fieldOverride = AccessibleObject.class.getDeclaredField("override");
        // fieldOverride.setAccessible(true);
        // fieldOverride.set(fieldName, true);
        fieldName.set(finalObject, "not final");
        System.out.println(finalObject);
    }

}