System.out.println(3/5) = 0；
System.out.println(2/5) = 0；
System.out.println(4/5) = 0；System.out.println(6/5) = 1；System.out.println(7/5) = 1；System.out.println(8/5) = 1；System.out.println(11/5) = 2；System.out.println(12/5) = 2；System.out.println(13/5) = 2；System.out.println(17%5) = 2;
System.out.println(16%5) = 1;System.out.println(13%5) = 3;System.out.println(8%5) = 3;System.out.println(7%5) = 2;System.out.println(2%5) = 2;
System.out.println(7%8) = 7;System.out.println(6%8) = 6;比如：8^11.
8转为二进制是1000，11转为二进制是1011.从高位开始比较得到的是：0011.然后二进制转为十进制，就是Integer.parseInt("0011",2)=3
原文：https://www.cnblogs.com/zhouyideboke/p/14675570.html