为什么我的开关不起作用？

Question

我正在使用计时器(10秒钟)System.currentTimemillis.我有一个方法,每秒刷新10次以下代码:

Start是活动的开始时间,它在onCreate方法中被"询问".我知道这很Integer.parseInt(Long.toString(y))有效,因为当我这样做时,我会System.out.println(Integer.parseInt(Long.toString(y)));正确回报时间.

所以,我的问题是我不知道为什么swich不能正常工作.

long y=System.currentTimeMillis()-start;

switch (Integer.parseInt(Long.toString(y))) {           
    case 1000:
        time.setText("3");
        time.setAnimation(anim);
        break;

    case 2000:
        time.setText("2");
        time.setAnimation(anim);
        break;

    case 3000:
        time.setText("1");
        time.setAnimation(anim);
        break;

    case 4000:
        time.setText("GOOO!");
        time.setAnimation(anim);
        count.setVisibility(View.VISIBLE);
        cuenta = 0;
        count.setText("0");
        break;

    case 5000:
        time.setText("1");
        time.setAnimation(anim);
        break;

    case 6000:
        time.setText("2");
        time.setAnimation(anim);
        break;

    case 7000:
        time.setText("3");
        time.setAnimation(anim);
        break;

    case 8000:
        time.setText("4");
        time.setAnimation(anim);
        break;

    case 9000:
        time.setText("5");
        time.setAnimation(anim);
        break;

    case 10000:
        time.setText("Time!");
        time.setAnimation(anim);
        count.setVisibility(View.INVISIBLE);
        break;
}

Answer 1

因为它不会完全给出这些数字1000,2000,3000 ......

如果数字给出或多或少,则案例将失败

编辑:

试试这个

public static boolean isBetween(int x, int lower, int upper) {
  return lower <= x && x <= upper;
}

if (isBetween(num, 0, 1000)) {

  // do something

} else if (isBetween(num, 1001, 2000)) {

// do domething

}
...

...