Java的n++问题

如下一串代码

package test;public class demo {public static void main(String[] args){int n=0;int m=0;for(int i=0;i<100;i++){n=n;n++;m=m++;System.out.println(n+","+m);}System.out.println(n+","+m);}}

输出结果为：

1,0
2,0
3,0
4,0
5,0
6,0
......
87,0
88,0
89,0
90,0
91,0
92,0
93,0
94,0
95,0
96,0
97,0
98,0
99,0
100,0
100,0