public static void perform(Object speaker) {
Class<?> spkr = speaker.getClass();
try {
try {
Method speak = spkr.getMethod("speak");
speak.invoke(speaker);
} catch (NoSuchMethodException e) {
print(speaker + " cannot speak");
}
try {
Method sit = spkr.getMethod("sit");
sit.invoke(speaker);
} catch (NoSuchMethodException e) {
print(speaker + " cannot sit");
}
} catch (Exception e) {
throw new RuntimeException(speaker.toString(), e);
}
}
