public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
Class cache = Integer.class.getDeclaredClasses()[0];
Field myCache = cache.getDeclaredField("cache");
myCache.setAccessible(true);
Integer[] newCache = (Integer[]) myCache.get(cache);
newCache[132] = newCache[134];
int a = 2;
int b = a + a;
System.out.printf("%d + %d = %d", a, a, b);
}