在Java CardLayout中,如何在卡之间传递数据
我对使用JavaGUI还不熟悉,我知道这听起来很可笑,但我已经尝试了几天在CardLayout上的卡之间传递数据。我使用的是netbeans,第一张卡显示一个客户列表。选择客户机时,选择将传递给该卡上的变量。下一张卡片查询数据库,以显示有关所选客户端的更多详细信息。我可以处理卡之间的切换,但我的问题是我无法将存储在卡1上的变量中的数据传递到卡2 我已经访问了几个论坛,阅读了类似的问题,但我就是无法找到任何可行的解决方案。请帮帮我,我是新手,所以请对我放松点,谢谢 下面是保存面板的类在Java CardLayout中,如何在卡之间传递数据,java,swing,cardlayout,Java,Swing,Cardlayout,我对使用JavaGUI还不熟悉,我知道这听起来很可笑,但我已经尝试了几天在CardLayout上的卡之间传递数据。我使用的是netbeans,第一张卡显示一个客户列表。选择客户机时,选择将传递给该卡上的变量。下一张卡片查询数据库,以显示有关所选客户端的更多详细信息。我可以处理卡之间的切换,但我的问题是我无法将存储在卡1上的变量中的数据传递到卡2 我已经访问了几个论坛,阅读了类似的问题,但我就是无法找到任何可行的解决方案。请帮帮我,我是新手,所以请对我放松点,谢谢 下面是保存面板的类 public
public class mainframe extends javax.swing.JFrame {
public mainframe() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
displayScrollPane = new javax.swing.JScrollPane();
displaypanel = new javax.swing.JPanel();
viewclientspanel1 = new viewclientspanel();
addclientpanel1 = new addclientpanel();
clientdetails1 = new clientdetails();
mainmenu = new javax.swing.JMenuBar();
clients = new javax.swing.JMenu();
viewclients = new javax.swing.JMenuItem();
addclient = new javax.swing.JMenuItem();
transactions = new javax.swing.JMenu();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
displaypanel.setBorder(javax.swing.BorderFactory.createEtchedBorder());
displaypanel.setLayout(new java.awt.CardLayout());
viewclientspanel1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
viewclientspanel1MouseClicked(evt);
}
});
displaypanel.add(viewclientspanel1, "viewclientscard");
displaypanel.add(addclientpanel1, "addclientcard");
displaypanel.add(clientdetails1, "clientdetailscard");
displayScrollPane.setViewportView(displaypanel);
clients.setText("Clients");
viewclients.setText("View Clients");
viewclients.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
viewclientsActionPerformed(evt);
}
});
clients.add(viewclients);
viewclients.getAccessibleContext().setAccessibleParent(mainmenu);
addclient.setText("Add Client");
addclient.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
addclientActionPerformed(evt);
}
});
clients.add(addclient);
mainmenu.add(clients);
transactions.setText("Transactions");
mainmenu.add(transactions);
setJMenuBar(mainmenu);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(displayScrollPane, javax.swing.GroupLayout.PREFERRED_SIZE, 1059, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(99, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(66, Short.MAX_VALUE)
.addComponent(displayScrollPane, javax.swing.GroupLayout.PREFERRED_SIZE, 570, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(33, 33, 33))
);
pack();
}// </editor-fold>
private void addclientActionPerformed(java.awt.event.ActionEvent evt) {
CardLayout card = (CardLayout) displaypanel.getLayout();
card.show(displaypanel, "addclientcard");
}
private void viewclientsActionPerformed(java.awt.event.ActionEvent evt) {
CardLayout card = (CardLayout) displaypanel.getLayout();
card.show(displaypanel, "viewclientscard");
}
private void viewclientspanel1MouseClicked(java.awt.event.MouseEvent evt) {
//viewclientspanel1.getComponentListeners();
}
/**
* @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(mainframe.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(mainframe.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(mainframe.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(mainframe.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 mainframe().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JMenuItem addclient;
private addclientpanel addclientpanel1;
private clientdetails clientdetails1;
private javax.swing.JMenu clients;
private javax.swing.JScrollPane displayScrollPane;
private javax.swing.JPanel displaypanel;
private javax.swing.JMenuBar mainmenu;
private javax.swing.JMenu transactions;
private javax.swing.JMenuItem viewclients;
private viewclientspanel viewclientspanel1;
// End of variables declaration
}
最后是一个类,我需要将客户机选择的信息传输到该类,DSI将向该类显示更多详细信息
public class clientdetails extends javax.swing.JPanel {
public clientdetails() {
initComponents();
}
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(addclient.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(addclient.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(addclient.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(addclient.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
JFrame f = new JFrame("Window");
f.add(new clientdetails());
f.setSize(500, 700);
f.setVisible(true);
}
private javax.swing.JPanel jPanel1;
}
公共类clientdetails扩展了javax.swing.JPanel{
公共客户端详细信息(){
初始化组件();
}
公共静态void main(字符串[]args){
/*设置Nimbus的外观和感觉*/
//
/*如果Nimbus(在JavaSE6中引入)不可用,请使用默认的外观。
*详情请参阅http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
试一试{
for(javax.swing.UIManager.LookAndFeelInfo:javax.swing.UIManager.getInstalledLookAndFeels()){
if(“Nimbus”.equals(info.getName())){
setLookAndFeel(info.getClassName());
打破
}
}
}捕获(ClassNotFoundException ex){
getLogger(addclient.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(实例化异常){
getLogger(addclient.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}捕获(非法访问例外){
getLogger(addclient.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(javax.swing.UnsupportedLookAndFeelException ex){
getLogger(addclient.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}
//
JFrame f=新的JFrame(“窗口”);
f、 添加(新的clientdetails());
f、 设置大小(500700);
f、 setVisible(真);
}
私有javax.swing.JPanel jPanel1;
}
您可以使用setter/getter将客户端信息从一个窗格传递到另一个窗格
clientDetailsPane.setClient(clientListPanel.getClient());
// Switch panels...
我也在想,你可以使用某种模型或映射,但对于你想要实现的目标来说,这可能太过分了。谢谢大家,我最终使用了一个类容器来保存我需要传递的变量
public class varcontainer {
public String variablename;
private static varcontainer instance = null;
public static varcontainer getInstance(){
if(instance == null){
instance = new varcontainer();
}
return instance;
}
}
然后,我从另一个类调用getInstance以获取容器的当前实例并访问变量
varcontainer.getInstance().variablename
再次感谢您的反馈,我非常感谢。您好,我已经用我的代码更新了帖子。我尝试将viewclientdetails类的实例传递给cleintdetails构造函数,以使我能够引用该实例中的变量。但是当我实现JFrame f=newjframe(“窗口”);f、 添加(新的clientdetails());第二行给出了一个错误,类clientdetails中的构造函数clientdetails不能应用于给定的类型。我仍然需要你的帮助。Thanks我认为解决问题的方法是使用模型-视图-控件设计模式将程序逻辑与其显示分开。您的“卡片”应该侦听模型中的更改,可能使用PropertyChangeListeners,然后通过更改它们显示的数据来响应更改。不,您不应该为此使用单例。坏习惯-1。
varcontainer.getInstance().variablename