Case1

public class InteviewTest04 {
  public static void main(String[] args) {
    int count = 0;
    for (int i = 0; i < 10; i++) {
      count = count++;
    }
    System.out.print(count);  // 结果为0
  }
}

结果为0

Case2

public static void main(String[] args) {
    int count = 0;
    for (int i = 0; i < 10; i++) {
      count = ++count;
    }
    System.out.print(count);  //结果为10，
  }