@Test
    public void testOnDivInt() {
        int a = 49999911, b = 100000000;
        System.out.println( "49999911/100000000=" + 100*a/b + "%" );

        int c = 499999, d = 1000000;
        System.out.println( "499999/1000000=" + 100*c/d + "%" );
    }



执行结果：
49999911/100000000=7%
499999/1000000=49%

------------------------------------------------------------------------------

加分析：

        /**
         * 输出：49999911/100000000=7%
         * 分析：java整数位4字节，共32位，最高位为符号位，所以最大值为2^31-1=2,147,483,647
         *     当 49,999,911*100 = 4,999,991,100，大于2^32，已经溢出。溢出后得到的数字为：705,023,804=(4,999,991,100 - 2^32)，
         *     因此结果为 705,023,804/100,000,000 = 7
         */
--
修改:chzhang7901 FROM 223.104.41.*
FROM 223.104.41.*