int times = 10000000;        Byte[] li = new Byte[times];        for (int i = 0; i < times; i++) {            li[i] = (byte) i;        }                long timeA = System.currentTimeMillis();        for (int i = 0; i < times; i++) {            li[i].toString();        }        long timeB = System.currentTimeMillis();        for (int i = 0; i < times; i++) {            String.valueOf(li[i]);        }        long timeC = System.currentTimeMillis();        System.out.
執(zhí)行結(jié)果：
A方法耗時(shí)：1303
B方法耗時(shí)：239
B方法好
String.valueOf(li[i]);
li[i] 為何變成Object了？不是應(yīng)該調(diào)用String.valueOf(Byte) ?求高手指教