Reflection ndadekaken program bisa mriksa lan manipulasi kelas, metode, lan kolom ing runtime — malah sing ora dienal ing wektu kompilasi. Annotations nglempakake metadata menyang kode sing diarep tools lan frameworks (asring liwat reflection) kanggo ngatur tingkah laku. Bareng-bareng dikuwatake akeh "magic" framework Java (Spring, JPA, JUnit).
Reflection — mriksa lan ngaktifake ing runtime
Class<?> clazz = Class.forName();
(Field field : clazz.getDeclaredFields()) {
System.out.println(field.getName() + + field.getType());
}
(Method method : clazz.getDeclaredMethods()) {
System.out.println(method.getName());
}
clazz.getDeclaredConstructor().newInstance();
clazz.getMethod(, String.class);
m.invoke(instance, );
clazz.getDeclaredField();
f.setAccessible();
