Java算术运算符

public class operator {
  public static void main(String[] args) {
    System.out.println(10 / 4); // 2
    System.out.println(10.0 / 4); // 2.5
    double d = 10 / 4;
    System.out.println(d); // 2.0
    System.out.println(10 % 3); // 1
    System.out.println(-10 % 3); // -1
    // a % b = a - a/b*b
    System.out.println(10 % -3); // 1
    int i = 10;
    i++;
    System.out.println(i); // 11
    ++i;
    System.out.println(i); // 12

    int j = 8;
    int k = ++j; // j = j + 1; k = j;
    System.out.println(j); // 9
    System.out.println(k); // 9

    int m = 8;
    int n = m++; // n = m; m = m + 1
    System.out.println(m); // 9
    System.out.println(n); // 8
  }
}