public class TestInteger {
- 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);
- }
} | 
