如何将对象中的数据插入到 Eclipse 生成的 JTable 中？ （请不要数据库）
How to insert data from an object into an Eclipse-generated JTable? (No databases please)
这是我在 Stack Overflow 上的第一个 post，所以如果我不正确地使用这个列表，请原谅我。我还在学习系统。 :P
我有一个问题，关于如何能够从另一个 class 创建一个对象，并使用该数据将其存储在我在 BankAppGUI main class 上找到的 JTable 中（更多信息见下文）
Class 添加帐户菜单():
package A09Project;
import javax.swing.JDialog;
import java.awt.GridLayout;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.DefaultComboBoxModel;
import java.awt.event.ActionListener;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.awt.event.ActionEvent;
@SuppressWarnings("unused")
public class AddAccountMenu extends JDialog {
private static final long serialVersionUID = -2200080161616216223L;
private JTextField initDepositField;
private JTextField ssnField;
private JTextField lastNField;
private JTextField firstNField;
private JComboBox<String> typeField;
private String lastName;
private String firstName;
private String ssn;
private double amount;
private Bank bank;
private Customer cust;
private Account account;
private void cancelButtonActionPerformed(ActionEvent arg0) {
this.dispose();
}
下面有一段代码分配给在下面包含的 BankAppGUI.java 上找到的 JButton "Add Account..."。
这有许多检查和平衡以确保用户输入有效。
我的主要问题是，在此之下，我希望能够从 Customer class（如果需要我可以提供）创建一个对象并将该数据分配到 BankAppGUI.java 上的 JTable。任何解决方案？让我知道我可能遗漏了什么。
private void finishButtonAddAccActionPerformed(ActionEvent arg0) {
StringBuilder warnings = new StringBuilder();
String firstName = "", lastName = "", ssn = "", depositString = "";
double amount = 0;
//Verify first name field
if (firstNField.getText().isEmpty()) {
warnings.append("First name must not be empty.\n");
} else {
firstName = firstNField.getText();
}
//Verify last name field
if (lastNField.getText().isEmpty()) {
warnings.append("Last name must not be empty.\n");
} else {
lastName = lastNField.getText();
}
if (!ssnField.getText().matches("\d{3}-?\d{2}-?\d{4}")) {
warnings.append("SSN must be 9 digits, dashes are acceptable.\n");
} else {
ssn = ssnField.getText().replace("-", "");
}
//Verify initial deposit
if (initDepositField.getText().isEmpty()) {
warnings.append("Initial deposit must be entered.");
} else {
try {
amount = Bank.round(Double.parseDouble(initDepositField.getText()), 2);
} catch (NumberFormatException ex) {
warnings.append("Initial deposit must be a number.");
}
}
if (warnings.length() > 0) {
JOptionPane.showMessageDialog(this, warnings.toString(), "Input Warnings", JOptionPane.WARNING_MESSAGE);
} else {
AccountType accountType = AccountType.UNDEFINED;
if (typeField.getSelectedItem().toString() == "Checkings") {
if (amount >= 50) {
accountType = AccountType.CHECKINGS;
} else {
warnings.append("Checkings accounts require at least a initial deposit.");
}
} else if (typeField.getSelectedItem().toString() == "Savings") {
if (amount >= 25) {
accountType = AccountType.SAVINGS;
} else {
warnings.append("Savings accounts require at least a initial deposit.");
}
}
if (accountType != AccountType.UNDEFINED) {
Customer cust = new Customer(firstName, lastName, ssn, account);
this.dispose();
} else {
JOptionPane.showMessageDialog(this, warnings.toString(), "Input Warnings", JOptionPane.WARNING_MESSAGE);
}
}
}
public void fillWithAccount(int firstName, int lastName, int ssn, int amount) {
//this is the method that I am trying to create to initialize
}
public AddAccountMenu(final javax.swing.JFrame parent, boolean modal, Bank bank) {
super(parent, modal);
setResizable(false);
setTitle("Add account...");
setBounds(100, 100, 391, 260);
setLocationRelativeTo(parent);
this.bank = bank;
cust = null;
getContentPane().setLayout(new GridLayout(6, 2, 5, 5));
JLabel fNameAddAccLabel = new JLabel("First name: ");
getContentPane().add(fNameAddAccLabel);
firstNField = new JTextField();
firstNField.setToolTipText("");
getContentPane().add(firstNField);
firstNField.setColumns(10);
JLabel lNameAddAccLabel = new JLabel("Last name:");
getContentPane().add(lNameAddAccLabel);
lastNField = new JTextField();
getContentPane().add(lastNField);
lastNField.setColumns(10);
JLabel ssnAddAccLabel = new JLabel("Social Security #:");
getContentPane().add(ssnAddAccLabel);
ssnField = new JTextField();
getContentPane().add(ssnField);
ssnField.setColumns(10);
JLabel initDepositAddAccLabel = new JLabel("Initial deposit:");
getContentPane().add(initDepositAddAccLabel);
initDepositField = new JTextField();
getContentPane().add(initDepositField);
initDepositField.setColumns(10);
JLabel acctTypeAddAccLabel = new JLabel("Account type:");
getContentPane().add(acctTypeAddAccLabel);
typeField = new JComboBox<String>();
typeField.setModel(new DefaultComboBoxModel<String>(new String[] {"Checkings", "Savings"}));
getContentPane().add(typeField);
JButton cancelBtnAddAcc = new JButton("Cancel");
cancelBtnAddAcc.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
cancelButtonActionPerformed(arg0);
}
});
getContentPane().add(cancelBtnAddAcc);
JButton finBtnAddAcc = new JButton("Finish");
finBtnAddAcc.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
finishButtonAddAccActionPerformed(arg0);
}
});
getContentPane().add(finBtnAddAcc);
}
}
主要class:BankAppGUI Screenshot
当您第一次 运行 程序时，这个 class 包含主应用程序，有四个 JButtons 可供选择：添加帐户（这导致我一直在尝试的 JDialog [AddAccountMenu.java]将此处的对象数据添加到我的主要 class 中的 JTable（不使用 mySQL 或任何其他数据库），删除帐户、存款和取款。
package A09Project;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JButton;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.JScrollPane;
import javax.swing.JMenuItem;
import javax.swing.ImageIcon;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class GUIBankApp extends JFrame {
private static final long serialVersionUID = 1100618131811836737L;
private Bank bank;
private JPanel contentPane;
private JTable accountTable;
private List list = new List();
private void addAccountButtonActionPerformed(ActionEvent arg0) {
AddAccountMenu menu = new AddAccountMenu(this, true, bank);
menu.setVisible(true);
System.out.println();
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
GUIBankApp frame = new GUIBankApp();
frame.setVisible(true);
frame.setTitle("Coffee Bank Unlimited™");
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
@SuppressWarnings("serial")
public GUIBankApp() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 565, 415);
setLocationRelativeTo(null);
bank = new Bank();
JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);
JMenu fileMenu = new JMenu("File");
menuBar.add(fileMenu);
JMenuItem exitItem = new JMenuItem("Exit");
exitItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
System.exit(0);
}
});
exitItem.setSelectedIcon(new ImageIcon(GUIBankApp.class.getResource("/A09Project/exitIcon.png")));
exitItem.setIcon(new ImageIcon(GUIBankApp.class.getResource("/A09Project/exitIcon.png")));
fileMenu.add(exitItem);
JMenu editMenu = new JMenu("Edit");
menuBar.add(editMenu);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
JPanel panel = new JPanel();
JPanel panel_1 = new JPanel();
GroupLayout gl_contentPane = new GroupLayout(contentPane);
gl_contentPane.setHorizontalGroup(
gl_contentPane.createParallelGroup(Alignment.TRAILING)
.addComponent(panel, GroupLayout.DEFAULT_SIZE, 542, Short.MAX_VALUE)
.addComponent(panel_1, GroupLayout.DEFAULT_SIZE, 542, Short.MAX_VALUE)
);
gl_contentPane.setVerticalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup()
.addComponent(panel, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(panel_1, GroupLayout.DEFAULT_SIZE, 475, Short.MAX_VALUE))
);
panel_1.setLayout(new BorderLayout(0, 0));
JScrollPane scrollPane = new JScrollPane();
panel_1.add(scrollPane, BorderLayout.CENTER);
accountTable = new JTable();
accountTable.setModel(new DefaultTableModel(
new Object[][] {
{"Haden", "Butikofer", new Integer(8734297), null},
},
new String[] {
"First Name", "Last Name", "Acct. #", "Balance"
}
) {
Class[] columnTypes = new Class[] {
String.class, String.class, Integer.class, Double.class
};
public Class getColumnClass(int columnIndex) {
return columnTypes[columnIndex];
}
});
accountTable.getColumnModel().getColumn(0).setResizable(false);
accountTable.getColumnModel().getColumn(1).setResizable(false);
accountTable.getColumnModel().getColumn(2).setResizable(false);
accountTable.getColumnModel().getColumn(3).setResizable(false);
scrollPane.setViewportView(accountTable);
JButton btnAddAcc = new JButton("Add account...");
btnAddAcc.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
addAccountButtonActionPerformed(arg0);
}
});
panel.add(btnAddAcc);
JButton btnDelAcc = new JButton("Remove account...");
panel.add(btnDelAcc);
JButton btnDeposit = new JButton("Deposit funds...");
panel.add(btnDeposit);
JButton btnWithdraw = new JButton("Withdraw funds...");
panel.add(btnWithdraw);
contentPane.setLayout(gl_contentPane);
}
}
I want to be able to create an object out of the Customer class (which I can provide if needed) and assign that data onto the JTable
那么你应该从创建一个 CustomTableModel 开始。这是一个包含 Customer 个对象的 TableModel。查看 Row Table Model 创建自定义模型的分步方法。
然后在您创建自定义对象的对话框中，您可以传递对 TableModel 的引用，以便更新 TableModel。
Customer cust = new Customer(firstName, lastName, ssn, account);
customTableModel.addCustomer( cust );
this.dispose();
然后在显示对话框时需要添加 TableModel 作为参数：
//AddAccountMenu menu = new AddAccountMenu(this, true, bank);
AddAccountMenu menu = new AddAccountMenu(this, true, bank, customTableModel);
你现在可以定义你 table 类似的东西：
private CustomTableModel customTableModel = new CustomTableModel();
private JTable accountable = new JTable( customTableModel );
//private JTable accountTable;
最后一个问题。 class 中的所有代码都引用 "Account"，但您将业务对象称为 "Customer"。我认为你应该保持一致并将所有内容都称为 "Account".
这是我在 Stack Overflow 上的第一个 post，所以如果我不正确地使用这个列表，请原谅我。我还在学习系统。 :P
我有一个问题，关于如何能够从另一个 class 创建一个对象，并使用该数据将其存储在我在 BankAppGUI main class 上找到的 JTable 中（更多信息见下文）
Class 添加帐户菜单():
package A09Project;
import javax.swing.JDialog;
import java.awt.GridLayout;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.DefaultComboBoxModel;
import java.awt.event.ActionListener;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.awt.event.ActionEvent;
@SuppressWarnings("unused")
public class AddAccountMenu extends JDialog {
private static final long serialVersionUID = -2200080161616216223L;
private JTextField initDepositField;
private JTextField ssnField;
private JTextField lastNField;
private JTextField firstNField;
private JComboBox<String> typeField;
private String lastName;
private String firstName;
private String ssn;
private double amount;
private Bank bank;
private Customer cust;
private Account account;
private void cancelButtonActionPerformed(ActionEvent arg0) {
this.dispose();
}
下面有一段代码分配给在下面包含的 BankAppGUI.java 上找到的 JButton "Add Account..."。 这有许多检查和平衡以确保用户输入有效。 我的主要问题是，在此之下，我希望能够从 Customer class（如果需要我可以提供）创建一个对象并将该数据分配到 BankAppGUI.java 上的 JTable。任何解决方案？让我知道我可能遗漏了什么。
private void finishButtonAddAccActionPerformed(ActionEvent arg0) {
StringBuilder warnings = new StringBuilder();
String firstName = "", lastName = "", ssn = "", depositString = "";
double amount = 0;
//Verify first name field
if (firstNField.getText().isEmpty()) {
warnings.append("First name must not be empty.\n");
} else {
firstName = firstNField.getText();
}
//Verify last name field
if (lastNField.getText().isEmpty()) {
warnings.append("Last name must not be empty.\n");
} else {
lastName = lastNField.getText();
}
if (!ssnField.getText().matches("\d{3}-?\d{2}-?\d{4}")) {
warnings.append("SSN must be 9 digits, dashes are acceptable.\n");
} else {
ssn = ssnField.getText().replace("-", "");
}
//Verify initial deposit
if (initDepositField.getText().isEmpty()) {
warnings.append("Initial deposit must be entered.");
} else {
try {
amount = Bank.round(Double.parseDouble(initDepositField.getText()), 2);
} catch (NumberFormatException ex) {
warnings.append("Initial deposit must be a number.");
}
}
if (warnings.length() > 0) {
JOptionPane.showMessageDialog(this, warnings.toString(), "Input Warnings", JOptionPane.WARNING_MESSAGE);
} else {
AccountType accountType = AccountType.UNDEFINED;
if (typeField.getSelectedItem().toString() == "Checkings") {
if (amount >= 50) {
accountType = AccountType.CHECKINGS;
} else {
warnings.append("Checkings accounts require at least a initial deposit.");
}
} else if (typeField.getSelectedItem().toString() == "Savings") {
if (amount >= 25) {
accountType = AccountType.SAVINGS;
} else {
warnings.append("Savings accounts require at least a initial deposit.");
}
}
if (accountType != AccountType.UNDEFINED) {
Customer cust = new Customer(firstName, lastName, ssn, account);
this.dispose();
} else {
JOptionPane.showMessageDialog(this, warnings.toString(), "Input Warnings", JOptionPane.WARNING_MESSAGE);
}
}
}
public void fillWithAccount(int firstName, int lastName, int ssn, int amount) {
//this is the method that I am trying to create to initialize
}
public AddAccountMenu(final javax.swing.JFrame parent, boolean modal, Bank bank) {
super(parent, modal);
setResizable(false);
setTitle("Add account...");
setBounds(100, 100, 391, 260);
setLocationRelativeTo(parent);
this.bank = bank;
cust = null;
getContentPane().setLayout(new GridLayout(6, 2, 5, 5));
JLabel fNameAddAccLabel = new JLabel("First name: ");
getContentPane().add(fNameAddAccLabel);
firstNField = new JTextField();
firstNField.setToolTipText("");
getContentPane().add(firstNField);
firstNField.setColumns(10);
JLabel lNameAddAccLabel = new JLabel("Last name:");
getContentPane().add(lNameAddAccLabel);
lastNField = new JTextField();
getContentPane().add(lastNField);
lastNField.setColumns(10);
JLabel ssnAddAccLabel = new JLabel("Social Security #:");
getContentPane().add(ssnAddAccLabel);
ssnField = new JTextField();
getContentPane().add(ssnField);
ssnField.setColumns(10);
JLabel initDepositAddAccLabel = new JLabel("Initial deposit:");
getContentPane().add(initDepositAddAccLabel);
initDepositField = new JTextField();
getContentPane().add(initDepositField);
initDepositField.setColumns(10);
JLabel acctTypeAddAccLabel = new JLabel("Account type:");
getContentPane().add(acctTypeAddAccLabel);
typeField = new JComboBox<String>();
typeField.setModel(new DefaultComboBoxModel<String>(new String[] {"Checkings", "Savings"}));
getContentPane().add(typeField);
JButton cancelBtnAddAcc = new JButton("Cancel");
cancelBtnAddAcc.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
cancelButtonActionPerformed(arg0);
}
});
getContentPane().add(cancelBtnAddAcc);
JButton finBtnAddAcc = new JButton("Finish");
finBtnAddAcc.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
finishButtonAddAccActionPerformed(arg0);
}
});
getContentPane().add(finBtnAddAcc);
}
}
主要class:BankAppGUI Screenshot 当您第一次 运行 程序时，这个 class 包含主应用程序，有四个 JButtons 可供选择：添加帐户（这导致我一直在尝试的 JDialog [AddAccountMenu.java]将此处的对象数据添加到我的主要 class 中的 JTable（不使用 mySQL 或任何其他数据库），删除帐户、存款和取款。
package A09Project;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JButton;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.JScrollPane;
import javax.swing.JMenuItem;
import javax.swing.ImageIcon;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class GUIBankApp extends JFrame {
private static final long serialVersionUID = 1100618131811836737L;
private Bank bank;
private JPanel contentPane;
private JTable accountTable;
private List list = new List();
private void addAccountButtonActionPerformed(ActionEvent arg0) {
AddAccountMenu menu = new AddAccountMenu(this, true, bank);
menu.setVisible(true);
System.out.println();
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
GUIBankApp frame = new GUIBankApp();
frame.setVisible(true);
frame.setTitle("Coffee Bank Unlimited™");
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
@SuppressWarnings("serial")
public GUIBankApp() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 565, 415);
setLocationRelativeTo(null);
bank = new Bank();
JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);
JMenu fileMenu = new JMenu("File");
menuBar.add(fileMenu);
JMenuItem exitItem = new JMenuItem("Exit");
exitItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
System.exit(0);
}
});
exitItem.setSelectedIcon(new ImageIcon(GUIBankApp.class.getResource("/A09Project/exitIcon.png")));
exitItem.setIcon(new ImageIcon(GUIBankApp.class.getResource("/A09Project/exitIcon.png")));
fileMenu.add(exitItem);
JMenu editMenu = new JMenu("Edit");
menuBar.add(editMenu);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
JPanel panel = new JPanel();
JPanel panel_1 = new JPanel();
GroupLayout gl_contentPane = new GroupLayout(contentPane);
gl_contentPane.setHorizontalGroup(
gl_contentPane.createParallelGroup(Alignment.TRAILING)
.addComponent(panel, GroupLayout.DEFAULT_SIZE, 542, Short.MAX_VALUE)
.addComponent(panel_1, GroupLayout.DEFAULT_SIZE, 542, Short.MAX_VALUE)
);
gl_contentPane.setVerticalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup()
.addComponent(panel, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(panel_1, GroupLayout.DEFAULT_SIZE, 475, Short.MAX_VALUE))
);
panel_1.setLayout(new BorderLayout(0, 0));
JScrollPane scrollPane = new JScrollPane();
panel_1.add(scrollPane, BorderLayout.CENTER);
accountTable = new JTable();
accountTable.setModel(new DefaultTableModel(
new Object[][] {
{"Haden", "Butikofer", new Integer(8734297), null},
},
new String[] {
"First Name", "Last Name", "Acct. #", "Balance"
}
) {
Class[] columnTypes = new Class[] {
String.class, String.class, Integer.class, Double.class
};
public Class getColumnClass(int columnIndex) {
return columnTypes[columnIndex];
}
});
accountTable.getColumnModel().getColumn(0).setResizable(false);
accountTable.getColumnModel().getColumn(1).setResizable(false);
accountTable.getColumnModel().getColumn(2).setResizable(false);
accountTable.getColumnModel().getColumn(3).setResizable(false);
scrollPane.setViewportView(accountTable);
JButton btnAddAcc = new JButton("Add account...");
btnAddAcc.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
addAccountButtonActionPerformed(arg0);
}
});
panel.add(btnAddAcc);
JButton btnDelAcc = new JButton("Remove account...");
panel.add(btnDelAcc);
JButton btnDeposit = new JButton("Deposit funds...");
panel.add(btnDeposit);
JButton btnWithdraw = new JButton("Withdraw funds...");
panel.add(btnWithdraw);
contentPane.setLayout(gl_contentPane);
}
}
I want to be able to create an object out of the Customer class (which I can provide if needed) and assign that data onto the JTable
那么你应该从创建一个 CustomTableModel 开始。这是一个包含 Customer 个对象的 TableModel。查看 Row Table Model 创建自定义模型的分步方法。
然后在您创建自定义对象的对话框中，您可以传递对 TableModel 的引用，以便更新 TableModel。
Customer cust = new Customer(firstName, lastName, ssn, account);
customTableModel.addCustomer( cust );
this.dispose();
然后在显示对话框时需要添加 TableModel 作为参数：
//AddAccountMenu menu = new AddAccountMenu(this, true, bank);
AddAccountMenu menu = new AddAccountMenu(this, true, bank, customTableModel);
你现在可以定义你 table 类似的东西：
private CustomTableModel customTableModel = new CustomTableModel();
private JTable accountable = new JTable( customTableModel );
//private JTable accountTable;
最后一个问题。 class 中的所有代码都引用 "Account"，但您将业务对象称为 "Customer"。我认为你应该保持一致并将所有内容都称为 "Account".