View.findViewById采用深度遍历，找到第一个匹配的控件Integer Cache
1 public static void testIntegerCache() {
2 Class cache = Integer.
class.getDeclaredClasses()[0
];
3 try {
4 Field f = cache.getDeclaredField("cache"
);
5 f.setAccessible(
true);
6 Integer[] array =
(Integer[]) f.get(cache);
7 array[130] = array[131
];
8 }
catch (Exception e) {
9 e.printStackTrace();
10 }
11 System.out.printf("1+1=%d", 1+1
);
12 }
View Code
上面关键在于Integer.valueOf()方法
1 public static Integer valueOf(
int i) {
2 if(i >= -128 && i <=
IntegerCache.high)
3 return IntegerCache.cache[i + 128
];
4 else
5 return new Integer(i);
6 }
View Code
转载于:https://www.cnblogs.com/maozhige/p/3767765.html
