Java 运算符 % 和 /

/ 是除运算符，

%是取模运算符

区别：

/ 是普通的除法运算，如果除数和被除数都是整数，则商是取整

%是求余数

private static void test() {
        System.out.println("2/5 = " +  / );
        System.out.println("2%5 = " +  % );
        System.out.println("5/2 = " +  / );
        System.out.println("5%2 = " +  % );
        System.out.println("-5/2 = " + - / );
        System.out.println("-5%2 = " + - % );
        System.out.println("5/-2 = " +  / -);
        System.out.println("5%-2 = " +  % -);
        System.out.println("--------");
        System.out.println("2/5.0 = " +  / 5.0);
        System.out.println("2%5.0 = " +  % 5.0);
        System.out.println("5.0/2 = " + 5.0 / );
        System.out.println("5.0%2 = " + 5.0 % );
        System.out.println("-5.0/2 = " + -5.0 / );
        System.out.println("-5.0%2 = " + -5.0 % );
        System.out.println("5.0/-2 = " + 5.0 / -);
        System.out.println("5.0%-2 = " + 5.0 % -);
    }
运行结果：
/ =
% =
/ =
% =
-/ = -
-% = -
/- = -
%- =
--------
/5.0 = 0.4
%5.0 = 2.0
5.0/ = 2.5
5.0% = 1.0
-5.0/ = -2.5
-5.0% = -1.0
5.0/- = -2.5
5.0%- = 1.0