用反射设置私有字段值

要访问私有字段，您需要设置

Field::setAccessible

Class<?> clazz = Child.class;Object cc = clazz.newInstance();Field f1 = cc.getClass().getSuperclass().getDeclaredField("a_field");f1.setAccessible(true);f1.set(cc, "reflecting on life");String str1 = (String) f1.get(cc);System.out.println("field: " + str1);