Java整除与求余，同时结果的符号变化

System.out.println(3/0.0);//Infinity 无穷大

System.out.println(-3/0.0);//-Infinity 负无穷大

System.out.println(0/0.0);//NAN

System.out.println(-0/0.0);//NAN

求余，余数的符号和被除数符号一致

System.out.println(4%3);//1

System.out.println(4%-3);//1

System.out.println(-4%3);//-1

System.out.println(-4%-3);//-1