在我的 GUI 中，导入 Excel 文件后，我需要创建可变数量的面板/选项卡。数量取决于从 Excel 文件导入的行数。我需要在不同的面板中显示行中包含的信息，并使用几个按钮在所有选项卡之间移动。例如，如果 Excel 文件包含 6 行：
字段 1：用户 1 字段 2：用户 1 年龄 < [1/6] >
因此，我可以通过单击箭头来浏览不同的面板：
Field1: user2 Field2: user2Age < [2/6] >
再考虑一点：Excel 文件导入不是获取信息的唯一方式，必须可以手动添加信息。因此，启动 GUI 后必须至少有一个面板，如果用户决定导入 Excel 文件，则必须创建多个面板。
我只需要一个提示即可开始编码。当然，我对其他可能性持开放态度。
这是一个可以帮助您入门的示例代码（您需要重新组织一下代码）。虽然有 1000 个虚拟用户，但它只使用一个面板来显示信息：
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
public class TestMultiplePanels {
private final UserList userList;
private User currentUser;
private JTextField name;
private JTextField age;
private JTextField index;
private JButton prev;
private JButton next;
public TestMultiplePanels(UserList userList) {
this.userList = userList;
}
protected void initUI() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel userPanel = new JPanel(new BorderLayout());
JPanel userInfoPanel = new JPanel(new GridBagLayout());
JPanel buttonPanel = new JPanel(new FlowLayout());
JLabel nameLabel = new JLabel("Name");
JLabel ageLabel = new JLabel("Age");
name = new JTextField(30);
age = new JTextField(5);
index = new JTextField(5);
index.setEditable(false);
prev = new JButton("<");
prev.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
setCurrentUser(userList.previous(currentUser));
}
});
next = new JButton(">");
next.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
setCurrentUser(userList.next(currentUser));
}
});
GridBagConstraints gbcLabel = new GridBagConstraints();
gbcLabel.anchor = GridBagConstraints.EAST;
GridBagConstraints gbcField = new GridBagConstraints();
gbcField.anchor = GridBagConstraints.WEST;
gbcField.gridwidth = GridBagConstraints.REMAINDER;
userInfoPanel.add(nameLabel, gbcLabel);
userInfoPanel.add(name, gbcField);
userInfoPanel.add(ageLabel, gbcLabel);
userInfoPanel.add(age, gbcField);
buttonPanel.add(prev);
buttonPanel.add(index);
buttonPanel.add(next);
userPanel.add(userInfoPanel);
userPanel.add(buttonPanel, BorderLayout.SOUTH);
setCurrentUser(userList.getUsers().get(0));
frame.add(userPanel);
frame.pack();
frame.setMinimumSize(frame.getPreferredSize());
frame.setVisible(true);
}
private void setCurrentUser(User user) {
currentUser = user;
name.setText(user.getUserName());
age.setText(String.valueOf(user.getAge()));
index.setText(user.getIndex() + "/" + userList.getCount());
next.setEnabled(userList.hasNext(user));
prev.setEnabled(userList.hasPrevious(user));
}
public static class UserList {
private List<User> users;
private List<User> unmodifiableUsers;
public UserList() {
super();
this.users = load();
unmodifiableUsers = Collections.unmodifiableList(users);
}
public int getCount() {
return users.size();
}
public List<User> getUsers() {
return unmodifiableUsers;
}
private List<User> load() {
List<User> users = new ArrayList<TestMultiplePanels.User>();
for (int i = 0; i < 1000; i++) {
User user = new User();
user.setUserName("User " + (i + 1));
user.setAge((int) (Math.random() * 80));
user.setIndex(i + 1);
users.add(user);
}
return users;
}
public boolean hasNext(User user) {
return user.getIndex() - 1 < users.size();
}
public boolean hasPrevious(User user) {
return user.getIndex() > 1;
}
public User next(User user) {
if (hasNext(user)) {
return users.get(user.getIndex());
} else {
return null;
}
}
public User previous(User user) {
if (hasPrevious(user)) {
return users.get(user.getIndex() - 2);
} else {
return null;
}
}
}
public static class User {
private String userName;
private int age;
private int index;
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public int getIndex() {
return index;
}
public void setIndex(int index) {
this.index = index;
}
}
public static void main(String[] args) {
final UserList userList = new UserList();
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
TestMultiplePanels testMultiplePanels = new TestMultiplePanels(userList);
testMultiplePanels.initUI();
}
});
}
}
您可以使用 ArrayList 动态创建面板，我认为它足够灵活且易于管理。要处理面板显示，您可以使用CardLayout。希望能帮助到你
ArrayList<JPanel> panelGroup = new ArrayList<JPanel>();
for (int i=0;i<numberOfPanelsToCreate;i++){
panelGroup.add(new JPanel());
}