我会尽力解释这个问题。
基本上我所拥有的是一个接收客户数据的系统（客户是一个对象），然后将其添加到一个数组中。我的工作没有问题。我正在努力工作的是，我还有一个选项，可以让用户编辑客户的详细信息。我试图实现这个的方式是;在一个单独的GUI中，我有一个comboBox，它将填充当前在arrayList中的所有客户名字。这也有效。
这是我的问题 - 我想要发生的是，当从comboBox中选择一个客户名字时，它应该找到该对象，然后用其各自的数据填写JTextFields，例如：客户名字应该弹出第一个名字textField而他的第二个名字会变成第二个名字TextField等。
我无法弄清楚这个问题，所以感谢任何帮助！
这只是少数几个课程中的一个，其余课程都有效。
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.text.MaskFormatter;
import javax.swing.JLabel;
import java.awt.SystemColor;
import java.text.ParseException;
import java.util.ArrayList;
import java.awt.Font;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.UIManager;
import java.awt.GridLayout;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JFormattedTextField;
import javax.swing.SwingConstants;
import javax.swing.JTextField;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JComboBox;
public class editCustomers extends JFrame {
private JPanel contentPane;
private JTextField textField;
private JTextField textField_1;
private JTextField textField_2;
private JTextField textField_3;
ArrayList<Customers> customerList;
private MaskFormatter mask = null;
/**
* Create the frame.
*/
public editCustomers(ArrayList<Customers> aList) {
customerList = aList;
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 700, 600);
setLocationRelativeTo(null);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
JPanel panel = new JPanel();
contentPane.add(panel, BorderLayout.CENTER);
panel.setLayout(new GridLayout(6, 0, 0, 0));
JPanel panel_12 = new JPanel();
panel.add(panel_12);
panel_12.setLayout(new BorderLayout(0, 0));
JLabel lblSelectACustomer = new JLabel("Select a Customer to Edit");
panel_12.add(lblSelectACustomer, BorderLayout.WEST);
JComboBox comboBox = new JComboBox();
//comboBox.setModel(new DefaultComboBoxModel());
for (Customers temp : customerList) {
comboBox.addItem(temp.getfName());
}
panel_12.add(comboBox, BorderLayout.EAST);
JPanel panel_3 = new JPanel();
panel.add(panel_3);
panel_3.setLayout(new BorderLayout(0, 0));
JLabel lbl1 = new JLabel("Edit Customers First Name");
lbl1.setVerticalAlignment(SwingConstants.TOP);
Dimension d = lbl1.getPreferredSize();
lbl1.setPreferredSize(new Dimension(d.width + 50, d.height));
panel_3.add(lbl1, BorderLayout.WEST);
JPanel panel_8 = new JPanel();
panel_3.add(panel_8, BorderLayout.CENTER);
textField = new JTextField();
panel_8.add(textField);
textField.setColumns(30);
JPanel panel_4 = new JPanel();
panel.add(panel_4);
panel_4.setLayout(new BorderLayout(0, 0));
JLabel lbl2 = new JLabel("Edit Customers Second Name");
lbl2.setVerticalAlignment(SwingConstants.TOP);
lbl2.getPreferredSize();
lbl2.setPreferredSize(new Dimension(d.width + 50, d.height));
panel_4.add(lbl2, BorderLayout.WEST);
JPanel panel_9 = new JPanel();
panel_4.add(panel_9, BorderLayout.CENTER);
textField_1 = new JTextField();
panel_9.add(textField_1);
textField_1.setColumns(30);
JPanel panel_5 = new JPanel();
panel.add(panel_5);
panel_5.setLayout(new BorderLayout(0, 0));
JLabel lbl3 = new JLabel("Edit Customers Address");
lbl3.setVerticalAlignment(SwingConstants.TOP);
lbl3.getPreferredSize();
lbl3.setPreferredSize(new Dimension(d.width + 50, d.height));
panel_5.add(lbl3, BorderLayout.WEST);
JPanel panel_10 = new JPanel();
panel_5.add(panel_10, BorderLayout.CENTER);
textField_2 = new JTextField();
panel_10.add(textField_2);
textField_2.setColumns(30);
JPanel panel_6 = new JPanel();
panel.add(panel_6);
panel_6.setLayout(new BorderLayout(0, 0));
JLabel lbl4 = new JLabel("Edit Customers Date of Birth");
lbl4.setVerticalAlignment(SwingConstants.TOP);
lbl4.getPreferredSize();
lbl4.setPreferredSize(new Dimension(d.width + 50, d.height));
panel_6.add(lbl4, BorderLayout.WEST);
JPanel panel_11 = new JPanel();
panel_6.add(panel_11, BorderLayout.CENTER);
textField_3 = new JTextField();
try {
mask = new MaskFormatter("##/##/####");
mask.setPlaceholderCharacter(' ');
} catch (ParseException e) {
e.printStackTrace();
}
JFormattedTextField textField_3 = new JFormattedTextField(mask);
textField_3.setText("dd/mm/yyyy");
panel_11.add(textField_3);
textField_3.setColumns(30);
JPanel panel_2 = new JPanel();
panel.add(panel_2);
panel_2.setLayout(new BorderLayout(0, 0));
JPanel panel_7 = new JPanel();
panel_2.add(panel_7, BorderLayout.CENTER);
JButton btnConfirm = new JButton("Confirm");
btnConfirm.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
panel_7.add(btnConfirm);
JButton btnCancel = new JButton("Cancel");
btnCancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
dispose();
}
});
panel_7.add(btnCancel);
JPanel panel_1 = new JPanel();
panel_1.setBackground(SystemColor.activeCaption);
contentPane.add(panel_1, BorderLayout.NORTH);
JLabel lblEditACurrent = new JLabel("Edit a Current Customer");
lblEditACurrent.setForeground(Color.BLACK);
lblEditACurrent.setFont(new Font("Arial", Font.PLAIN, 19));
lblEditACurrent.setBackground(UIManager.getColor("InternalFrame.activeTitleBackground"));
panel_1.add(lblEditACurrent);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
editCustomers frame = new editCustomers(new ArrayList<Customers>());
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
}
答案 0 :(得分：0)
你可以试试这样的...... 更改第63-67行如下。将客户放入组合框而不仅仅是名称。
JComboBox<Customer> comboBox = new JComboBox<>();
//comboBox.setModel(new DefaultComboBoxModel());
for (Customers temp : customerList) {
comboBox.addItem(temp);
}
然后为组合框实现ActionListener，如下所示。
comboBox.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
Customer customer = comboBox.getSelectedItem();
// Use the above customer object's fields to populate your text fields
}
});