我没有把我所有的课程都放在这里，但这里是：
package main;
import java.io.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.JOptionPane;
import java.text.DecimalFormat;
public class CheckOptionsPanel extends JFrameL implements Serializable {
public static CheckingAccount account;
// static void chooseFile(int i) {
// throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
// }
private JPanel panel;
private JLabel title;
private JRadioButton enterTrans;
private JRadioButton listTrans;
private JRadioButton listChecks;
private JRadioButton listDep;
private JRadioButton readFile;
private JRadioButton writeFile;
private ButtonGroup radioButtonGroup; // To group radio buttons
//
private static String filePath;
public static boolean changeInAcc;
//
private int transCode, checkNumber;
private double transAmount, chargeAmount;
private String transCodeStr, transAmountStr, message, checkNumberStr, serviceCharge = "svc.chrg.";
private String transType;//Check or deposit
private int chargedNum = 0; //number of times charged for having balance below $500
private double finalBalance;
/**
* ********************************************************
*/
private final int WINDOW_WIDTH = 400;
private final int WINDOW_HEIGHT = 150;
//Constructor
public CheckOptionsPanel(CheckingAccount acc) {
account = acc;
setTitle("Checking Account Actions");
setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
//setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
buildPanel();
//adding panel to frame's content pane
add(panel);
//display
//setBackground(Color.GREEN);
setVisible(true);
}
private void buildPanel() {
enterTrans = new JRadioButton("Enter transaction");
enterTrans.setBackground(Color.GREEN);
listTrans = new JRadioButton("List all Transactions");
listTrans.setBackground(Color.GREEN);
listChecks = new JRadioButton("List all Checks");
listChecks.setBackground(Color.GREEN);
listDep = new JRadioButton("List all Deposits");
listDep.setBackground(Color.GREEN);
readFile = new JRadioButton("Read from file");
readFile.setBackground(Color.GREEN);
writeFile = new JRadioButton("Write to the file");
writeFile.setBackground(Color.GREEN);
title = new JLabel("Choose action:\n");
title.setFont(new Font("Helvetica", Font.BOLD, 24));
setBackground(Color.GREEN);
//Group RadioButtons
radioButtonGroup = new ButtonGroup();
radioButtonGroup.add(enterTrans);
radioButtonGroup.add(listTrans);
radioButtonGroup.add(listChecks);
radioButtonGroup.add(listDep);
radioButtonGroup.add(readFile);
radioButtonGroup.add(writeFile);
//adding listeners to radio buttons
enterTrans.addActionListener(new RadioButtonListener());
listTrans.addActionListener(new RadioButtonListener());
listChecks.addActionListener(new RadioButtonListener());
listDep.addActionListener(new RadioButtonListener());
readFile.addActionListener(new RadioButtonListener());
writeFile.addActionListener(new RadioButtonListener());
//create panel
panel = new JPanel();
panel.add(title);
panel.add(enterTrans);
panel.add(listTrans);
panel.add(listChecks);
panel.add(listDep);
panel.add(readFile);
panel.add(writeFile);
//setBackground(Color.GREEN);
}
//raidiButtonListener
private class RadioButtonListener implements ActionListener {
DecimalFormat formatter = new DecimalFormat("0.00");
public void actionPerformed(ActionEvent e) {
if (e.getSource() == enterTrans) {
boolean transException;
do {
transException = false;
try {
do {
transCodeStr = JOptionPane.showInputDialog("Enter trans code:");
transCode = Integer.parseInt(transCodeStr);
if (transCode != 0 && transCode != 1 && transCode != 2) {
String message = "Invalid input!\nPlease enter 1 for Check, 2 for Deposit or 0 to exit the "
+ "Please try again:";
JOptionPane.showMessageDialog(null, message);
}
} while (transCode != 0 && transCode != 1 && transCode != 2);
} catch (NumberFormatException ep) {
JOptionPane.showMessageDialog(null, "Wrong input format!\nTry again:");
transException = true;
}
} while (transException == true);
if (transCode == 1) {
boolean checkException;
do {
checkException = false;
try {
checkNumberStr = JOptionPane.showInputDialog("Enter the check number:");
checkNumber = Integer.parseInt(checkNumberStr);
} catch (NumberFormatException nfe) {
JOptionPane.showMessageDialog(null, "Wrong input format!\nTry again:");
checkException = true;
}
} while (checkException == true);
}
if (transCode != 0) {
boolean amtException;
do {
amtException = false;
try {
do {
transAmountStr = JOptionPane.showInputDialog("Enter trans amt:");
transCode = Integer.parseInt(transCodeStr);
transAmount = Double.parseDouble(transAmountStr);
if (transAmount < 0) {
String message = "Invalid input!\nTransaction amount must be a positive number.\n"
+ "Please try again:";
JOptionPane.showMessageDialog(null, message);
}
} while (transAmount < 0);
} catch (NumberFormatException ae) {
JOptionPane.showMessageDialog(null, "Wrong input format!\nTry again:");
amtException = true;
}
} while (amtException == true);
account.setBalance(transAmount, transCode);
account.setServiceCharge(transAmount, transCode);
if (transCode == 1) {
transType = "Check";
chargeAmount = 0.15;
//create transaction abject for check
Transaction checkTrans = new Check(checkNumber, account.getTransCount(), transAmount, transType);
account.addTrans(checkTrans);
//increment number of transactions
account.setTransCount();
// create transaction object for service charge
account.addTrans(account.getTransCount(), chargeAmount, serviceCharge);
account.setTransCount();
} else {
transType = "Deposit";
chargeAmount = 0.10;
account.addTrans(account.getTransCount(), transAmount, transType);
account.setTransCount();
account.addTrans(account.getTransCount(), chargeAmount, serviceCharge);
account.setTransCount();
}
message = account.getName() + "'s account\n" + "Transaction: ";
if ("Check".equals(transType)) {
message += transType + " #" + checkNumber + " in amount of $";
} else {
message += transType + " in amount of $";
}
message += formatter.format(transAmount) + " \nCurrnet Balance: $"
+ formatter.format(account.getBalance())
+ " \nService Charge: " + transType + " --- charge $"
+ formatter.format(chargeAmount);
if (account.warningMessage()) {
message += " \nWarning: Balance below $50";
}
if (account.negativeBalance()) {
message += " \nService charge: Below $0 --- charge: $10.00";
account.addTrans(account.getTransCount(), 10, serviceCharge);
account.setTransCount();
}
if (account.belowBalanceCheck() && account.getbelow500Charge() && chargedNum == 0) {
message += " \nService Charge: Below $500 --- charge: $5.00";
chargedNum++;
account.addTrans(account.getTransCount(), 5, serviceCharge);
account.setTransCount();
}
message += " \nTotal Service Charge: $" + formatter.format(account.getServiceCharge());
JOptionPane.showMessageDialog(null, message);
} else {
finalBalance = account.getBalance() - account.getServiceCharge();
message = account.getName() + "'s account\n" + "Transaction : End" + " \nCurrnet Balance: ($"
+ formatter.format(account.getBalance()) + ")" + " \nTotal Service Charge: $"
+ formatter.format(account.getServiceCharge())
+ "\nFinal Balance: ($" + finalBalance + ")";
JOptionPane.showMessageDialog(null, message);
}
changeInAcc = true;
/*Endof enterTrans*/ } else if (e.getSource() == listTrans) {
account.getAllTransReport();
} else if (e.getSource() == listChecks) {
account.CheckSort();
} else if (e.getSource() == listDep) {
account.DepSort();
} else if (e.getSource() == writeFile) {
chooseFile(2);
try {
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(filePath));
out.writeObject(account);
out.close();
} catch (IOException exc) {
exc.getMessage();
}
} else {
chooseFile(1);
try {
ObjectInputStream in = new ObjectInputStream(new FileInputStream(filePath));
account = (CheckingAccount) in.readObject();
in.close();
} catch (ClassNotFoundException ex) {
JOptionPane.showMessageDialog(null, "Class not found in this file", "warning", JOptionPane.WARNING_MESSAGE);
} catch (ClassCastException ex) {
JOptionPane.showMessageDialog(null, "Unable to cast file", "warning", JOptionPane.WARNING_MESSAGE);
} catch (InvalidClassException ex) {
JOptionPane.showMessageDialog(null, "Invalid class", "warning", JOptionPane.WARNING_MESSAGE);
} catch (EOFException ex) {
JOptionPane.showMessageDialog(null, "File is empty", "warning", JOptionPane.WARNING_MESSAGE);
} catch (StreamCorruptedException ex) {
JOptionPane.showMessageDialog(null, "File is Corrupted", "warning", JOptionPane.WARNING_MESSAGE);
} catch (FileNotFoundException ex) {
JOptionPane.showMessageDialog(null, "File not found", "warning", JOptionPane.WARNING_MESSAGE);
} catch (IOException ex) {
JOptionPane.showMessageDialog(null, e);
}
}
}
}
public static void chooseFile(int ioOption) {
int status;
JFileChooser chooser = new JFileChooser();
if (ioOption == 1) {
status = chooser.showOpenDialog(null);
} else {
status = chooser.showSaveDialog(null);
}
if (status == JFileChooser.APPROVE_OPTION) {
File file = chooser.getSelectedFile();
filePath = file.getPath();
}
changeInAcc = false;
}
}
其中控制退出按钮。
package main;
import javax.swing.*;
import java.awt.event.*;
public class JFrameL extends JFrame
{
/** Creates a new instance of JFrameL */
public JFrameL() {
//super(title);
JFrameL.FrameListener listener = new JFrameL.FrameListener();
addWindowListener(listener);
}
private class FrameListener extends WindowAdapter
{
public void windowClosing(WindowEvent e) {
//This will only be seen on standard output.
//System.out.println("WindowListener method called:");
if(CheckOptionsPanel.changeInAcc ==true){
CheckOptionsPanel.chooseFile(2);
}
setVisible(false);
System.exit(0);
}
}
}
当我点击退出时，它实际上打开了保存窗口，我输入了正在保存的文件的名称，它似乎工作正常，但文件实际上没有保存在我的计算机中。 / p>
问题是，当我手动保存文件时ChooseFile()方法工作得非常好，这意味着我点击了'写入文件'按钮......但是当点击退出按钮时它不会真正保存我的文件。
为什么不能保存？
答案 0 :(得分：2)
您的chooseFile没有I / O.它允许用户选择和归档并且没有......
public static void chooseFile(int ioOption) {
int status;
JFileChooser chooser = new JFileChooser();
if (ioOption == 1) {
status = chooser.showOpenDialog(null);
} else {
status = chooser.showSaveDialog(null);
}
if (status == JFileChooser.APPROVE_OPTION) {
File file = chooser.getSelectedFile();
filePath = file.getPath();
}
changeInAcc = false;
}
与“写”选项相比......
chooseFile(2);
try {
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(filePath));
out.writeObject(account);
out.close();
} catch (IOException exc) {
exc.getMessage();
}
一句警告。以这种方式依赖static变量只会炸毁你的脸。 chooseFile方法应返回已选择的File。
您应该创建一个read和write方法来执行这些操作，并允许您根据需要（从类的实例）访问它们...
我没有看到你如何神奇地想到调用chooseFile方法实际上会突然保存任何东西......
<强>加成
谢谢Andrew ......
您的异常处理还有一些不足之处。至少要付出努力的要点。如果你想显示错误信息，你应该使用Exception#printStackTrace，它会自动将堆栈跟踪转储到标准输出，让你的生活变得更简单......
chooseFile(2);
try {
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(filePath));
out.writeObject(account);
out.close();
} catch (IOException exc) {
//exc.getMessage(); <-- This is useless
exc.printStackTrace();
}