我希望在我的JFrame表单中使用CardLayout来交换JPanel 这是JFrame表单的代码：
public class Login extends javax.swing.JFrame {
/**
* Creates new form Login
*/
public Login() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//
private void initComponents() {
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 400, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 300, Short.MAX_VALUE)
);
pack();
}// </editor-fold>
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Login().setVisible(true);
}
});
}
// Variables declaration - do not modify
// End of variables declaration
}
JFrame启动时加载的第一个JPanel是：
public class LoginPanel extends javax.swing.JPanel {
private Font original;
/**
* Creates new form LoginPanel
*/
public LoginPanel() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
Email = new javax.swing.JLabel();
emailField = new javax.swing.JTextField();
login = new javax.swing.JButton();
password = new javax.swing.JLabel();
passwordField = new javax.swing.JPasswordField();
register = new javax.swing.JLabel();
background = new javax.swing.JLabel();
setLayout(null);
Email.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
Email.setText("Email address");
add(Email);
Email.setBounds(155, 115, 90, 14);
emailField.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseEntered(java.awt.event.MouseEvent evt) {
emailFieldMouseEntered(evt);
}
public void mouseExited(java.awt.event.MouseEvent evt) {
emailFieldMouseExited(evt);
}
});
add(emailField);
emailField.setBounds(115, 135, 170, 20);
login.setText("Login");
add(login);
login.setBounds(156, 240, 90, 23);
password.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
password.setText("Password");
add(password);
password.setBounds(155, 170, 90, 14);
add(passwordField);
passwordField.setBounds(115, 191, 170, 20);
register.setForeground(new java.awt.Color(0, 0, 255));
register.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
register.setText("Don't have an account? Register!");
register.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
registerMouseClicked(evt);
}
public void mouseEntered(java.awt.event.MouseEvent evt) {
registerMouseEntered(evt);
}
public void mouseExited(java.awt.event.MouseEvent evt) {
registerMouseExited(evt);
}
});
add(register);
register.setBounds(115, 220, 170, 14);
background.setIcon(new javax.swing.ImageIcon("C:\\Users\\Matteo\\Desktop\\Netbeans Project\\Social_Network\\background.png")); // NOI18N
background.setText("jLabel1");
add(background);
background.setBounds(0, 0, 400, 300);
}// </editor-fold>
private void registerMouseClicked(java.awt.event.MouseEvent evt) {
}
private void registerMouseEntered(java.awt.event.MouseEvent evt) {
original = register.getFont();
Map attributes = original.getAttributes();
attributes.put(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON);
register.setFont(original.deriveFont(attributes));
Cursor cursor = Cursor.getDefaultCursor();
cursor = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
setCursor(cursor);
}
private void registerMouseExited(java.awt.event.MouseEvent evt) {
register.setFont(original);
Cursor cursor = Cursor.getDefaultCursor();
setCursor(cursor);
}
private void emailFieldMouseEntered(java.awt.event.MouseEvent evt) {
Cursor cursor = Cursor.getDefaultCursor();
cursor = Cursor.getPredefinedCursor(Cursor.TEXT_CURSOR);
setCursor(cursor);
}
private void emailFieldMouseExited(java.awt.event.MouseEvent evt) {
Cursor cursor = Cursor.getDefaultCursor();
setCursor(cursor);
}
// Variables declaration - do not modify
private javax.swing.JLabel Email;
private javax.swing.JLabel background;
private javax.swing.JTextField emailField;
private javax.swing.JButton login;
private javax.swing.JLabel password;
private javax.swing.JPasswordField passwordField;
private javax.swing.JLabel register;
// End of variables declaration
}
点击按钮时要交换的第二个JPanel：
public class RegisterPanel extends javax.swing.JPanel {
/**
* Creates new form RegisterPanel
*/
public RegisterPanel() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jTextField1 = new javax.swing.JTextField();
jTextField2 = new javax.swing.JTextField();
jTextField4 = new javax.swing.JTextField();
jPasswordField1 = new javax.swing.JPasswordField();
register = new javax.swing.JButton();
cancel = new javax.swing.JButton();
Name = new javax.swing.JLabel();
LastName = new javax.swing.JLabel();
Email = new javax.swing.JLabel();
Password = new javax.swing.JLabel();
icon = new javax.swing.JLabel();
jPasswordField2 = new javax.swing.JPasswordField();
repeatPassword = new javax.swing.JLabel();
jLabel1 = new javax.swing.JLabel();
setToolTipText("");
setPreferredSize(new java.awt.Dimension(400, 300));
setLayout(null);
add(jTextField1);
jTextField1.setBounds(110, 60, 240, 20);
add(jTextField2);
jTextField2.setBounds(110, 100, 240, 20);
add(jTextField4);
jTextField4.setBounds(110, 140, 240, 20);
add(jPasswordField1);
jPasswordField1.setBounds(110, 180, 240, 20);
register.setIcon(new javax.swing.ImageIcon("C:\\Users\\Matteo\\Desktop\\Netbeans Project\\Social_Network\\cancel.png")); // NOI18N
register.setText("Cancel");
register.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
registerMouseClicked(evt);
}
});
add(register);
register.setBounds(240, 260, 90, 25);
cancel.setIcon(new javax.swing.ImageIcon("C:\\Users\\Matteo\\Desktop\\Netbeans Project\\Social_Network\\confirm.png")); // NOI18N
cancel.setText("Register");
add(cancel);
cancel.setBounds(130, 260, 93, 25);
Name.setText("Name");
add(Name);
Name.setBounds(20, 60, 27, 14);
LastName.setText("Last name");
add(LastName);
LastName.setBounds(20, 100, 60, 14);
Email.setText("Email address");
add(Email);
Email.setBounds(20, 140, 70, 14);
Password.setText("Password");
add(Password);
Password.setBounds(20, 180, 50, 14);
icon.setFont(new java.awt.Font("Tahoma", 1, 12)); // NOI18N
icon.setIcon(new javax.swing.ImageIcon("C:\\Users\\Matteo\\Desktop\\Netbeans Project\\Social_Network\\addUser.png")); // NOI18N
icon.setText(" Registration user");
add(icon);
icon.setBounds(20, 10, 180, 40);
add(jPasswordField2);
jPasswordField2.setBounds(110, 220, 240, 20);
repeatPassword.setText("Repeat password");
add(repeatPassword);
repeatPassword.setBounds(20, 220, 90, 14);
jLabel1.setIcon(new javax.swing.ImageIcon("C:\\Users\\Matteo\\Desktop\\Netbeans Project\\Social_Network\\background.png")); // NOI18N
jLabel1.setText("jLabel1");
add(jLabel1);
jLabel1.setBounds(0, 0, 400, 300);
}// </editor-fold>
private void registerMouseClicked(java.awt.event.MouseEvent evt) {
}
// Variables declaration - do not modify
private javax.swing.JLabel Email;
private javax.swing.JLabel LastName;
private javax.swing.JLabel Name;
private javax.swing.JLabel Password;
private javax.swing.JButton cancel;
private javax.swing.JLabel icon;
private javax.swing.JLabel jLabel1;
private javax.swing.JPasswordField jPasswordField1;
private javax.swing.JPasswordField jPasswordField2;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
private javax.swing.JTextField jTextField4;
private javax.swing.JButton register;
private javax.swing.JLabel repeatPassword;
// End of variables declaration
}
单击按钮时，如何编写交换JPanel？
答案 0 :(得分：1)
您需要访问CardLayout实例并使用布局的show(...)，添加传递给您要显示的面板的名称。 How to Use CardLayout已明确说明这一点。
另见How to Use CardLayout with Netbeans GUI Builder了解
另见this answer了解
<强>更新
如果要从面板内部调用CardLayout，可以使用要显示的方法创建要实现的界面。让具有CardLayout的类实现它，并将框架的实例传递给面板类似
public interface Switchable {
void show(String card);
}
public class Login extends JFrame implements Switchable {
LoginPanel panel = new LoginPanel(this);
@Override
public void show(String card) {
CardLayout layout = (CardLayout)getLayout();
layout.show(card);
}
}
public class LoginPanel extends JPanel {
private Switchable switcher;
public LoginPanel(Switchable switcher) {
this.switcher = switcher;
}
private void buttonActionPerformed(ActionEvent e) {
switcher.show(...);
}
}