所以我正在尝试测试我的程序，看它是否会累计我添加的支出。
所以我使用选项2，添加两个费用，以测试是否总计。然后我转到选项5（费用选项），然后转到案例2（列出总费用），这是它重置并重新打开原始Joption屏幕
package homebudget;
import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.swing.JOptionPane;
/**
*
* @author Derek
*/
public class HomeBudget
{
//Features to add:
//Reminder 2 days before an auto deduction
public static void main(String[] args) throws Exception
{
// TODO code application logic here
List<Bills> deductions = new ArrayList();
String billName, deductDate, resp;
double amount, totalAmount;
int cmd, year, month, date;
totalAmount = 0;
List<Spending> expenses = new ArrayList();
String type;
List<Income> deposits = new ArrayList();
String incomeType;
String fname = JOptionPane.showInputDialog("Enter the name of the budget file, none if no file");
if (fname.compareTo("none") !=0)
{
FileInputStream ist = new FileInputStream(fname);
ObjectInputStream ifile = new ObjectInputStream(ist);
deductions = (ArrayList<Bills>) ifile.readObject();
}
boolean done = false;
while(!done)
{
resp = JOptionPane.showInputDialog("Enter a command from: \n"
+ "\t1:Add a new deduction\n" //think its done
+ "\t2:Add a new expense\n"
+ "\t3:Add a deposit\n"
+ "\t4:Deduction options\n"
+ "\t5:Expense Options\n"
+ "\t6:Total balances in bank\n"
+ "\t7:quit");
cmd = Integer.parseInt(resp);
switch(cmd)
{
case 1:
billName = JOptionPane.showInputDialog("Enter the name of the bill:");
deductDate = JOptionPane.showInputDialog("Enter the deduct date:");
resp = JOptionPane.showInputDialog("Enter the deduct amount");
amount = Double.parseDouble(resp);
Bills d = new Bills(billName, deductDate, amount);
deductions.add(d);
break;
case 2:
//Give the option to add new spending occurence.
//Give option to choose from array of spending types.
type = JOptionPane.showInputDialog("Enter the type of the expense:");
resp = JOptionPane.showInputDialog("Enter the amount of the expense:");
amount = Double.parseDouble(resp);
resp = JOptionPane.showInputDialog("Enter the year of the expense:");
year = Integer.parseInt(resp);
resp = JOptionPane.showInputDialog("Enter the month of the expense:");
month = Integer.parseInt(resp);
resp = JOptionPane.showInputDialog("Enter the date of the expense:");
date = Integer.parseInt(resp);
Spending s = new Spending(amount, type, year, month, date);
expenses.add(s);
break;
//Income reporting
case 3:
resp = JOptionPane.showInputDialog("Enter the type of deposit:");
incomeType = resp;
resp = JOptionPane.showInputDialog("Enter the amount of the deposit:");
amount = Double.parseDouble(resp);
resp = JOptionPane.showInputDialog("Enter the year of the deposit:");
year = Integer.parseInt(resp);
resp = JOptionPane.showInputDialog("Enter the month of the deposit:");
month = Integer.parseInt(resp);
resp = JOptionPane.showInputDialog("Enter the date of the deposit:");
date = Integer.parseInt(resp);
Income i = new Income(amount, incomeType, year, month, date);
break;
case 4:
//deduction options
break;
case 5:
//expense options
resp = JOptionPane.showInputDialog("Enter a command from: \n"
+ "\t1: List all expenses in a month\n" //done
+ "\t2: List the total spent on an expense for the month\n"
+ "\t3: List all expenses in a year\n"
+ "\t4: List all expenses by type in a year\n"
+ "\t5: \n"
+ "\t6: \n"
+ "\t7:quit");
switch(cmd){
case 1:
resp = JOptionPane.showInputDialog("What year of expenses would you like to see?:");
year = Integer.parseInt(resp);
resp = JOptionPane.showInputDialog("What month of expenses would you like to see?:");
month = Integer.parseInt(resp);
boolean found = false;
Iterator<Spending> spendIter = expenses.iterator();
while(!found && spendIter.hasNext())
{
s = spendIter.next();
if(s.getYear() == year && s.getMonth() == month)
{
//How to print out an element of this Array List?
System.out.println("Here is the expense list for the month number " + month + ": \n") ;
System.out.println("Expense Type: " + s.getType() + "Amount" + s.getAmount() + "Date" + s.getDay());
found = true;
}
else
{
System.out.println("There are no expenses entered for this month.");
}
}
break;
case 2:
//How to list total spending on an expense per month.
type = JOptionPane.showInputDialog("Enter the type of the expense:");
resp = JOptionPane.showInputDialog("Enter the month of the expense:");
month = Integer.parseInt(resp);
found = false;
spendIter = expenses.iterator();
double totalSpent = 0;
while(spendIter.hasNext())
{
s = spendIter.next();
if(s.getType() == type && s.getMonth() == month)
{
totalSpent = totalSpent + s.getAmount();
}
JOptionPane.showMessageDialog(null, "Total money spent on " + type + ": $"
+ totalSpent);
}
break;
}
}
}
}
答案 0 :(得分：2)
在内置交换机中，您仍然在尝试打开cmd，这是外部交换机正在打开的内容。因此，在第二次切换之前，您应该执行以下操作：
int cmd2 = Integer.parseInt(resp);
然后：
switch (cmd2) {
我认为您在某处也错过了break，但这不是主要问题。