Java 2+2=5

import java.lang.reflect.Field;

public class Main {

public static void main(String[] args) throws Exception {

    Class cache = Integer.class.getDeclaredClasses()[0];

    Field c = cache.getDeclaredField("cache");

    c.setAccessible(true);

    Integer[] array = (Integer[]) c.get(cache);

    array[132] = array[133];

    System.out.printf("%d",2 + 2);

    }

}