Try & Catch in double Array 没有像我预期的那样工作

Question

我正在尝试对用户输入执行 try catch，如果通过检查则将用户输入放入数组中，但如果我输入无效输入，它会将索引替换为 0 并移至下一个索引。我试图弄清楚如何让重新提示在 for 循环内工作，以便该特定索引中的无效值被有效的用户输入替换。数组中值的顺序无关紧要。我正在尝试在不导入其他 Java 库的情况下执行此操作！

非常感谢任何帮助！我是编程新手 Java。感谢您的时间！

public static double[] getAmount()
   {
      int MAX_NUM = 10;
      double[] numArray = new double[MAX_NUM];
      for (int i = 0; i < numArray.length;i++)
      {
         double numInput;
         do
         {
            try
            {
               numInput = Double.parseDouble(JOptionPane.showInputDialog("Enter amounts in $: "));
            }
            catch (NumberFormatException e)
            {
               numInput = MAX_NUM - 11;
            }
            if (numInput < 0 || numInput > 999999)
            {
               JOptionPane.showMessageDialog(null, "Error. Please enter valid amount in dollars");
               numInput = Double.parseDouble(JOptionPane.showInputDialog("Enter amount in $: "));
            }
            else
            {
               numArray[i] = numInput;
            }
          }
          while (numInput < 0 && numInput > 999999);
       }
       return numArray;      
    }

Answer 1

public static double[] getAmount()
{
  int MAX_NUM = 10;
  double[] numArray = new double[MAX_NUM];
  int i = 0;
  while (i < numArray.length)
  {
     double numInput;

        try
        {
           numInput = Double.parseDouble(JOptionPane.showInputDialog("Enter amounts in $: "));
        }
        catch (NumberFormatException e)
        {
           numInput = MAX_NUM - 11;
        }
        if (numInput < 0 || numInput > 999999)
        {
           JOptionPane.showMessageDialog(null, "Error. Please enter valid amount in dollars");
           numInput = Double.parseDouble(JOptionPane.showInputDialog("Enter amount in $: "));
        }
        else
        {
           numArray[i] = numInput;
           i++;
        }
   }

   return numArray;
}

Answer 2

这应该有效：


public static double[] getAmount()
   {
      int MAX_NUM = 10;
      double[] numArray = new double[MAX_NUM];
      for (int i = 0; i < numArray.length;i++)
      {
         double numInput;
         do
         {
            try
            {
               numInput = Double.parseDouble(JOptionPane.showInputDialog("Enter amounts in $: "));
            }
            catch (NumberFormatException e)
            {
               numInput = MAX_NUM - 11;
            }
            if (numInput < 0 || numInput > 999999)
            {

               JOptionPane.showMessageDialog(null, "Error. Please enter valid amount in dollars");
            }
          }
          while (numInput < 0 || numInput > 999999);
          numArray[i] = numInput;
       }
       return numArray;      
    }

Try & Catch in double Array 没有像我预期的那样工作

Try & Catch in double Array not working as I expected

java

arrays

try-catch

numberformatexception