public class TestInteger {code
public static void main(String[] args) throws NoSuchFieldException,IllegalAccessException { Class cache = Integer.class.getDeclaredClasses()[0];//1 Field myCache = cache.getDeclaredField("cache");//2 myCache.setAccessible(true);//3 Integer[] newCache = (Integer[]) myCache.get(cache);//4 newCache[132] = newCache[133];//5 int a = 2; int b = a+a ; System.out.printf("%d+%d=%d",a,a,b); }
}get