Question

我在数据库中有一些值。我正在拿它并根据
进行比较我的需要，但问题是它将它与列表的最后一个值进行比较如果我得到我的值与条件相比，循环应该断开并使用循环中的中断如果条件但它不起作用。像数据一样。

serial_number=1  
range_one_start=1.00    to  range_one_end=1.10  
range_two_start=20.00   to  range_two_end=20.40  
rate=1.00
------
serial_number=2  
range_one_start=1.11    to  range_one_end=1.20  
range_two_start=20.00   to  range_two_end=20.50  
rate=2.00  
------
serial_number=3  
range_one_start=1.21    to  range_one_end=1.30  
range_two_start=20.00   to  range_two_end=20.50  
rate=3.00

依此类推我想得到serial_number 2的数据，所以我将传递数据
Range_one = 1.12和Range_two = 20所以在ans中我将得到率2.00 所以if条件就像

if(1.12 >= 1.11 && 1.12 <= 1.20 && 20 >= 20.00 && 20 <= 20.50 )
    {
        Double rate_value = 2.00;

        break;
    }

下面的

是我的循环

 for (int i = 0; i < list.size(); i++) {
    Double serial_number = Double.parseDouble(list.get(i).Serial_number_);
    Double range_one_start = Double.parseDouble(list.get(i).Range_one_start);
    Double range_one_end = Double.parseDouble(list.get(i).Range_one)end);
    Double range_two_start = Double.parseDouble(list.get(i).Range_two_start);
    Double range_two__end = Double.parseDouble(list.get(i).Range_two_end);
    Double rate = Double.parseDouble(list.get(i).Rate);
    if(Range_one >= range_one_start && Range_one <= range_one_end && Range_two >= range_two_start && Range_two <= range_two__end )
    {
        Double rate_value = rate;

        break; // this break statement is not working its not breaking the loop.
    }
}

提前致谢

Answer 1

使用以下代码：

for (int i = 0; i < list_p_to_p_clr_buffalo.size(); i++) {
   Double serial_number =     Double.parseDouble(list_p_to_p_clr_buffalo.get(i).Serial_number_P_To_P_CLR_Buffalo);
   Double range_one_start = Double.parseDouble(list_p_to_p_clr_buffalo.get(i).fat_from_P_To_P_CLR_Buffalo);
   Double range_one_end = Double.parseDouble(list_p_to_p_clr_buffalo.get(i).fat_to_P_To_P_CLR_Buffalo);
   Double range_two_start = Double.parseDouble(list_p_to_p_clr_buffalo.get(i).CLR_from_P_To_P_CLR_Buffalo);
   Double range_two__end = Double.parseDouble(list_p_to_p_clr_buffalo.get(i).CLR_to_P_To_P_CLR_Buffalo);
   Double rate = Double.parseDouble(list_p_to_p_clr_buffalo.get(i).rate_P_To_P_CLR_Buffalo);
   Log.e("IF Condition == >", " " +(fatRate >= range_one_start && fatRate <= range_one_end && clrRate >= range_two_start && clrRate <= range_two__end ));

   try {
       if(fatRate >= range_one_start && fatRate <= range_one_end && clrRate >= range_two_start && clrRate <= range_two__end ) {
           Log.e("IF CONDITION DEBUG == >", "CONDITION OK");
           pToPClrRate = rate;
           Log.e("Rate***pToPClrRate* Buff** ==>",""+pToPClrRate);
            runOnUiThread(new Runnable() {
                public void run() {
                    // some code #3 (Write your code here to run in UI thread)
                    condition = true; 
                    refreshBtn.setEnabled(true);
                }
            });

            break; // this break statement is not working its not breaking the loop.
        }
        else{
            runOnUiThread(new Runnable() {
                public void run() {
                    // some code #3 (Write your code here to run in UI thread)
                    condition = false; 
                    refreshBtn.setEnabled(false);
                 }
            });

            Log.e("IF CONDITION DEBUG == >", "CONDITION no else part");
        }


    } catch (Exception e) {
         // TODO: handle exception
         Log.e("Exception  == >", " "+ e);
    }

}

结论：无论如何都要检查你的情况。

break语句不能使循环停止

1 个答案: