我正在尝试制作一个所得税计算器,并且我有一个带有菜单栏的MainWindow
来打开文件。在我使用 JFileChooser 打开并解析文件后,我将结果放入 Taxpayer 类中。问题是读取文件,但我无法使结果显示在 MainWindow
上。我需要以某种方式返回到 MainWindow 并在打开文件后刷新结果。因此,基本上我需要做的是使用 JFormattedTextField
的适当信息刷新已打开的 MainWindow
(其中有空的 JFormattedTextFields)。
这是MainWindow
的代码:
package gui;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JMenu;
import javax.swing.JLabel;
import java.awt.Font;
import javax.swing.JList;
import javax.swing.JButton;
import javax.swing.JSeparator;
import javax.swing.JComboBox;
import javax.swing.JTextPane;
import javax.swing.JFormattedTextField;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.util.ArrayList;
import javax.swing.JCheckBox;
import javax.swing.text.NumberFormatter;
import datamodel.Taxpayer;
public class MainWindow extends JFrame{
private JFrame frame;
private Taxpayer taxpayer;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
MainWindow window = new MainWindow();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public MainWindow() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setBounds(100, 100, 590, 524);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("Income Tax Calculator");
JMenuBar menuBar = new JMenuBar();
frame.setJMenuBar(menuBar);
JMenu menuFile = new JMenu("File");
menuBar.add(menuFile);
JMenuItem menuOpenFile = new JMenuItem("Open File");
menuOpenFile.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
FileChooser chooser = new FileChooser();
chooser.setVisible(true);
}
});
menuFile.add(menuOpenFile);
JMenuItem menuExit = new JMenuItem("Exit");
menuExit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
frame.dispose();
}
});
menuFile.add(menuExit);
JMenu menuOptions = new JMenu("Options");
menuBar.add(menuOptions);
JMenu menuTaxpayer = new JMenu("Taxpayer");
menuOptions.add(menuTaxpayer);
JMenuItem menuItemDeleteTaxpayer = new JMenuItem("Delete");
menuItemDeleteTaxpayer.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
TaxpayerDeletion deletedTaxpayer = new TaxpayerDeletion();
deletedTaxpayer.setVisible(true);
}
});
menuTaxpayer.add(menuItemDeleteTaxpayer);
JMenu menuReceipt = new JMenu("Receipt");
menuOptions.add(menuReceipt);
JMenuItem menuItemAdd = new JMenuItem("Add");
menuItemAdd.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
ReceiptAdding receipt = new ReceiptAdding();
receipt.setVisible(true);
}
});
menuReceipt.add(menuItemAdd);
JMenuItem menuItemDeleteReceipt = new JMenuItem("Delete");
menuItemDeleteReceipt.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
ReceiptDeletion deletedReceipt = new ReceiptDeletion();
deletedReceipt.setVisible(true);
}
});
menuReceipt.add(menuItemDeleteReceipt);
JMenu menuHelp = new JMenu("Help");
menuBar.add(menuHelp);
JMenuItem menuItemHelp = new JMenuItem("Help");
menuHelp.add(menuItemHelp);
JMenuItem menuItemAbout = new JMenuItem("About");
menuHelp.add(menuItemAbout);
frame.getContentPane().setLayout(null);
JLabel labelSelectTaxpayer = new JLabel("Please select a taxpayer from the list:");
labelSelectTaxpayer.setFont(new Font("Tahoma", Font.PLAIN, 12));
labelSelectTaxpayer.setBounds(25, 21, 211, 23);
frame.getContentPane().add(labelSelectTaxpayer);
JLabel labelPersonalDetails = new JLabel("Personal Details");
labelPersonalDetails.setFont(new Font("Tahoma", Font.BOLD, 14));
labelPersonalDetails.setBounds(238, 69, 211, 14);
frame.getContentPane().add(labelPersonalDetails);
JLabel labelName = new JLabel("Name:");
labelName.setFont(new Font("Tahoma", Font.PLAIN, 12));
labelName.setBounds(56, 105, 46, 14);
frame.getContentPane().add(labelName);
JLabel labelAfm = new JLabel("AFM:");
labelAfm.setFont(new Font("Tahoma", Font.PLAIN, 12));
labelAfm.setBounds(56, 130, 46, 14);
frame.getContentPane().add(labelAfm);
JLabel labelStatus = new JLabel("Status:");
labelStatus.setFont(new Font("Tahoma", Font.PLAIN, 12));
labelStatus.setBounds(56, 155, 46, 14);
frame.getContentPane().add(labelStatus);
JLabel labelIncome = new JLabel("Income:");
labelIncome.setFont(new Font("Tahoma", Font.PLAIN, 12));
labelIncome.setBounds(56, 180, 59, 14);
frame.getContentPane().add(labelIncome);
JLabel labelReceipts = new JLabel("Receipts:");
labelReceipts.setFont(new Font("Tahoma", Font.PLAIN, 12));
labelReceipts.setBounds(56, 205, 59, 23);
frame.getContentPane().add(labelReceipts);
JButton buttonCalculate = new JButton("Calculate");
buttonCalculate.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
Report report = new Report();
report.setVisible(true);
}
});
buttonCalculate.setFont(new Font("Tahoma", Font.BOLD, 14));
buttonCalculate.setBounds(429, 425, 135, 31);
frame.getContentPane().add(buttonCalculate);
JSeparator separatorLeftDetails = new JSeparator();
separatorLeftDetails.setBounds(10, 81, 218, 2);
frame.getContentPane().add(separatorLeftDetails);
JSeparator separatorRightDetails = new JSeparator();
separatorRightDetails.setBounds(346, 81, 219, 2);
frame.getContentPane().add(separatorRightDetails);
JComboBox comboBoxTaxpayerList = new JComboBox();
comboBoxTaxpayerList.setBounds(246, 23, 319, 20);
frame.getContentPane().add(comboBoxTaxpayerList);
JComboBox comboBoxReceiptsList = new JComboBox();
comboBoxReceiptsList.setBounds(143, 207, 357, 20);
frame.getContentPane().add(comboBoxReceiptsList);
JFormattedTextField formattedTextFieldAfm = new JFormattedTextField();
formattedTextFieldAfm.setEditable(false);
formattedTextFieldAfm.setEnabled(true);
if(taxpayer != null){
System.out.println("TAXPAYER NOT NULL");
formattedTextFieldAfm.setText(String.valueOf(taxpayer.getTaxRegistrationNumber()));
formattedTextFieldAfm.setVisible(true);
}
formattedTextFieldAfm.setBounds(143, 128, 357, 20);
frame.getContentPane().add(formattedTextFieldAfm);
JFormattedTextField formattedTextFieldStatus = new JFormattedTextField();
formattedTextFieldStatus.setEditable(false);
formattedTextFieldStatus.setEnabled(true);
if(taxpayer != null){
formattedTextFieldStatus.setText(taxpayer.getStatus());
}
formattedTextFieldStatus.setBounds(143, 153, 357, 20);
frame.getContentPane().add(formattedTextFieldStatus);
JFormattedTextField formattedTextFieldIncome = new JFormattedTextField();
formattedTextFieldIncome.setEditable(false);
formattedTextFieldIncome.setEnabled(true);
//formattedTextFieldIncome.setText(String.valueOf(taxpayer.getIncome()));
formattedTextFieldIncome.setBounds(143, 178, 357, 20);
frame.getContentPane().add(formattedTextFieldIncome);
JFormattedTextField formattedTextFieldName = new JFormattedTextField();
formattedTextFieldName.setEditable(false);
formattedTextFieldName.setEnabled(true);
//formattedTextFieldName.setText(taxpayer.getName());
formattedTextFieldName.setBounds(143, 103, 357, 20);
frame.getContentPane().add(formattedTextFieldName);
JSeparator separatorLeftCalculation = new JSeparator();
separatorLeftCalculation.setBounds(10, 253, 218, 2);
frame.getContentPane().add(separatorLeftCalculation);
JLabel lblTaxCalculation = new JLabel("Tax Calculation");
lblTaxCalculation.setFont(new Font("Tahoma", Font.BOLD, 14));
lblTaxCalculation.setBounds(233, 227, 200, 50);
frame.getContentPane().add(lblTaxCalculation);
JSeparator separatorReightCalculation = new JSeparator();
separatorReightCalculation.setBounds(340, 253, 225, 2);
frame.getContentPane().add(separatorReightCalculation);
JLabel lblPleaseSelectOne = new JLabel("Please select one or more options for tax calculation");
lblPleaseSelectOne.setFont(new Font("Tahoma", Font.PLAIN, 12));
lblPleaseSelectOne.setBounds(155, 266, 505, 23);
frame.getContentPane().add(lblPleaseSelectOne);
JCheckBox checkBoxTotalTax = new JCheckBox("Total Tax");
checkBoxTotalTax.setBounds(93, 306, 150, 23);
frame.getContentPane().add(checkBoxTotalTax);
JCheckBox chechBoxTaxAnalysis = new JCheckBox("Tax analysis(Basic tax, tax increase or decrease based on receipts)");
chechBoxTaxAnalysis.setBounds(92, 332, 357, 23);
frame.getContentPane().add(chechBoxTaxAnalysis);
JCheckBox checkBoxReceiptsTotalValue = new JCheckBox("Total value of the gathered receipts");
checkBoxReceiptsTotalValue.setBounds(93, 358, 271, 23);
frame.getContentPane().add(checkBoxReceiptsTotalValue);
JCheckBox checkBoxAmountDifferentCategories = new JCheckBox("Analysis of the amounts spent for different categories of expenditure");
checkBoxAmountDifferentCategories.setBounds(93, 384, 421, 23);
frame.getContentPane().add(checkBoxAmountDifferentCategories);
}
public void setTaxpayerInfo(Taxpayer taxpayer){
this.taxpayer = taxpayer;
System.out.println("Test message :Inside");
}
}
这是FileChooser
的代码:
package gui;
import input.TxtParser;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import datamodel.Taxpayer;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.File;
import java.io.FileNotFoundException;
public class FileChooser extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
private JPanel contentPane;
private Taxpayer taxpayer;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
FileChooser frame = new FileChooser();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public FileChooser() {
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setBounds(100, 100, 593, 436);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
javax.swing.JFileChooser fileChooser = new javax.swing.JFileChooser();
fileChooser.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(e.getActionCommand()!= null){
File file = fileChooser.getSelectedFile();
TxtParser txtParser = new TxtParser();
try {
taxpayer = txtParser.parse(file);
if(taxpayer == null){
System.out.println("NULL TAXPAYER");
}
System.out.println(taxpayer);
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
MainWindow mainWindow = new MainWindow();
mainWindow.setTaxpayerInfo(taxpayer);
mainWindow.setEnabled(true);
mainWindow.setVisible(true);
close();
}
}
});
fileChooser.setBounds(0, 0, 582, 397);
contentPane.add(fileChooser);
this.setTitle("Income Tax Calculator");
}
private void close(){
this.dispose();
}
}
最佳答案
您有很多问题...
首先,您的 MainWindow
类从 JFrame
扩展,但也创建 JFrame
的另一个实例
public class MainWindow extends JFrame{
private JFrame frame;
哪一帧实际上包含内容或在屏幕上可见?我首先删除 extends JFrame
FileChooser
类不是必需的,您正在重复 JFileChooser
类本身提供的功能,并且这样做会让您的生活变得困难......
JMenuItem menuOpenFile = new JMenuItem("Open File");
menuOpenFile.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
JFileChooser chooser = new JFileChooser();
switch (chooser.showOpenDialog(frame)) {
case JFileChooser.APPROVE_OPTION:
File file = fileChooser.getSelectedFile();
TxtParser txtParser = new TxtParser();
try {
taxpayer = txtParser.parse(file);
if (taxpayer == null) {
System.out.println("NULL TAXPAYER");
}
System.out.println(taxpayer);
setTextpayerInfo(taxPayer);
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
break;
}
}
});
在现有的 FileChooser
类中,您创建 MainWindow
的另一个实例并调用 setTextpayerInfo
,但 setTextpayerInfo
不会什么都不做?!
您的 setTextpayerInfo
方法需要填写您希望用户能够操作的字段或控件。
将您的功能分成单独的类,以便您拥有一个 TaxPayerPane
,其中包含与 TaxPayer
的管理直接相关的字段和控件类。
然后将您需要的功能(菜单)和 TaxPayerPane
组合到 JFrame
的单个实例上。根据需要使用 setter/getter 在应用程序的各个部分之间传递信息。
这里的想法是分离和限制应用程序的不同部分,以便它们只执行其设计的单一工作。这可以解耦您的代码,使其更易于管理和更改,并减少尝试管理不同逻辑 block 的重叠复杂性
此外,请避免使用 null
布局,它们比它们的值(value)更让人头疼。利用适当的布局管理器,将它们组合起来不仅可以生成丰富的 UI,还可以生成灵活的 UI,可以适应平台和外观之间的差异
关于打开文件后 Java GUI 刷新结果,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30662977/