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我正在編寫一個Java程序，用戶輸入一個銷售額，然後輸入一個代碼（1，2或3），然後程序會計算佣金銷售類型（用戶輸入的代碼）。它適用於1和3，但出於一些奇怪的原因，當我輸入代碼2時它什麼也不做，只是關閉，即使代碼幾乎與1和3相同。任何幫助，將不勝感激。對我沒有意義的編程錯誤
public class TravelCommission extends Frame
{
static double dollars;
static double answer;
static int empCode;
static DecimalFormat df = new DecimalFormat("#.#");
public static void main(String[] args)
{
//Calling all methods
dollars = getSales(0);
empCode = getCode(0);
answer = getCommission(dollars, empCode);
output(dollars, answer);
finish();
}
private static double getSales(double sales)
{
//Getting sales along with error checking and exception handeling
try
{
sales = Double.parseDouble(JOptionPane.showInputDialog(null, "Please enter in sales:", "Sales", JOptionPane.DEFAULT_OPTION));
if(sales <= 0)
{
JOptionPane.showMessageDialog(null, "Please enter a value greater than 0.", "Error", JOptionPane.INFORMATION_MESSAGE);
}
else if(sales == JOptionPane.CANCEL_OPTION)
{
System.exit(0);
}
else
{
}
}
catch (IllegalArgumentException e)
{
JOptionPane.showMessageDialog(null, "Enter in a double value.", "Error!", JOptionPane.ERROR_MESSAGE);
}
return sales;
}
private static int getCode(int code)
{
try
{
code = Integer.parseInt(JOptionPane.showInputDialog(null, "Please enter the code for the type of sale\n1 = Telephone\n2 = In-store\n3 = Outdoor:", "Sales", JOptionPane.DEFAULT_OPTION));
if(code <= 0 || code > 3)
{
JOptionPane.showMessageDialog(null, "Please enter a 1, 2, or 3.", "Error", JOptionPane.INFORMATION_MESSAGE);
}
else if(code == JOptionPane.CANCEL_OPTION)
{
System.exit(0);
}
else
{
}
}
catch (IllegalArgumentException e)
{
JOptionPane.showMessageDialog(null, "Please enter in a 1, 2, or 3.", "Error!", JOptionPane.ERROR_MESSAGE);
}
return code;
}
private static double getCommission(double dollars, int empCode)
{
//Determing the amount of commission made based off of the type of sale
if(empCode == 1)
{
answer = dollars * 0.10;
}
else if(empCode == 2)
{
answer = dollars * 0.14;
}
else if(empCode == 3)
{
answer = dollars * 0.18;
}
return answer;
}
//Outputing the commission
public static int output(double dollars, double answer)
{
JOptionPane.showMessageDialog(null, "Your total commission on sales of $" + dollars + " is $" + df.format(answer));
return 0;
}
//Closes the program
public static void finish()
{
System.exit(0);
return;
}
}
你可能想看看'JOptionPane.CANCEL_OPTION'是什麼值。 –
[你的步調試器告訴你什麼？]（http://stackoverflow.com/questions/25385173/what-is-a-debugger-and-how-can-it-help-me-diagnose-problems） –