（编辑）的
我正在创建一个动态更改面板的小项目。
我已经能够编写可以使用JFrame（ManagerScreen）中的按钮使用动作事件调用JPanel的代码。例如：
package route66.JFrames;
import route66.pannels.BuyReserve;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import route66.pannels.Buy;
import route66.pannels.BuyReport;
import route66.pannels.CustomerDetails;
import route66.pannels.NewUser;
import route66.pannels.QuotPanel;
import route66.pannels.ReportPanel;
import route66.pannels.Salaries_Com;
import route66.pannels.SaleSucces;
/**
*
* @author Vavu
*/
public class ManagerScreen extends javax.swing.JFrame {
GridBagLayout layout = new GridBagLayout();
Buy BuyPanel = new Buy();
Buy b = new Buy();
BuyReserve buyR = new BuyReserve();
BuyReport brep = new BuyReport();
CustomerDetails cusD = new CustomerDetails();
QuotPanel QP = new QuotPanel();
ReportPanel RP = new ReportPanel();
NewUser NW = new NewUser();
Salaries_Com SalCom = new Salaries_Com();
SaleSucces SalS = new SaleSucces();
boolean visible;
/**
* Creates new form ManagerScreen
* @param pabel
*/
public ManagerScreen() {
initComponents();
DynamicPanel.setLayout(layout);
GridBagConstraints c = new GridBagConstraints();
c.gridx = 0;
c.gridy = 0;
DynamicPanel.add(b,c);
DynamicPanel.add(buyR,c);
DynamicPanel.add(brep,c);
DynamicPanel.add(cusD,c);
DynamicPanel.add(QP,c);
DynamicPanel.add(RP,c);
DynamicPanel.add(NW,c);
DynamicPanel.add(SalCom,c);
DynamicPanel.add(SalS,c);
b.setVisible(false);
buyR.setVisible(false);
brep.setVisible(false);
cusD.setVisible(false);
QP.setVisible(false);
RP.setVisible(false);
NW.setVisible(false);
SalCom.setVisible(false);
SalS.setVisible(false);
}
/**
* 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() {
DynamicPanel = new javax.swing.JPanel();
MSbuy = new javax.swing.JButton();
MSQuotation = new javax.swing.JButton();
MSReserve = new javax.swing.JButton();
MSSalCom = new javax.swing.JButton();
MSReport = new javax.swing.JButton();
MSCreateNew = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setMinimumSize(new java.awt.Dimension(980, 740));
getContentPane().setLayout(null);
DynamicPanel.setBackground(new java.awt.Color(255, 0, 0));
DynamicPanel.setMaximumSize(new java.awt.Dimension(500, 500));
DynamicPanel.setMinimumSize(new java.awt.Dimension(500, 500));
DynamicPanel.setPreferredSize(new java.awt.Dimension(700, 500));
javax.swing.GroupLayout DynamicPanelLayout = new javax.swing.GroupLayout(DynamicPanel);
DynamicPanel.setLayout(DynamicPanelLayout);
DynamicPanelLayout.setHorizontalGroup(
DynamicPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 700, Short.MAX_VALUE)
);
DynamicPanelLayout.setVerticalGroup(
DynamicPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 500, Short.MAX_VALUE)
);
getContentPane().add(DynamicPanel);
DynamicPanel.setBounds(330, 260, 700, 500);
MSbuy.setText("Buy");
MSbuy.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
MSbuyActionPerformed(evt);
}
});
getContentPane().add(MSbuy);
MSbuy.setBounds(70, 480, 188, 29);
MSQuotation.setText("Quotation");
MSQuotation.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
MSQuotationActionPerformed(evt);
}
});
getContentPane().add(MSQuotation);
MSQuotation.setBounds(70, 520, 188, 29);
MSReserve.setText("Reserve");
MSReserve.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
MSReserveActionPerformed(evt);
}
});
getContentPane().add(MSReserve);
MSReserve.setBounds(70, 440, 188, 29);
MSSalCom.setText("Salaries & Commission");
MSSalCom.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
MSSalComActionPerformed(evt);
}
});
getContentPane().add(MSSalCom);
MSSalCom.setBounds(70, 400, 188, 29);
MSReport.setText("Report");
MSReport.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
MSReportActionPerformed(evt);
}
});
getContentPane().add(MSReport);
MSReport.setBounds(70, 560, 187, 29);
MSCreateNew.setText("Create New User");
MSCreateNew.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
MSCreateNewActionPerformed(evt);
}
});
getContentPane().add(MSCreateNew);
MSCreateNew.setBounds(70, 600, 187, 29);
jLabel1.setFont(new java.awt.Font("Lucida Grande", 0, 48)); // NOI18N
jLabel1.setForeground(new java.awt.Color(0, 0, 204));
jLabel1.setText("ROUTE66 CAR DEALERSHIP");
getContentPane().add(jLabel1);
jLabel1.setBounds(330, 0, 650, 130);
jLabel3.setText(".");
getContentPane().add(jLabel3);
jLabel3.setBounds(0, 0, 330, 260);
jLabel2.setText(".");
getContentPane().add(jLabel2);
jLabel2.setBounds(330, 90, 650, 210);
pack();
}// </editor-fold>
private void MSbuyActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
b.setVisible(false);
buyR.setVisible(true);
brep.setVisible(false);
cusD.setVisible(false);
QP.setVisible(false);
RP.setVisible(false);
NW.setVisible(false);
SalCom.setVisible(false);
SalS.setVisible(false);
}
private void MSSalComActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
b.setVisible(false);
buyR.setVisible(false);
brep.setVisible(false);
cusD.setVisible(false);
QP.setVisible(false);
RP.setVisible(false);
NW.setVisible(false);
SalCom.setVisible(true);
SalS.setVisible(false);
}
private void MSReserveActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
b.setVisible(false);
buyR.setVisible(false);
brep.setVisible(false);
cusD.setVisible(false);
QP.setVisible(false);
RP.setVisible(true);
NW.setVisible(false);
SalCom.setVisible(false);
SalS.setVisible(false);
}
private void MSQuotationActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void MSReportActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void MSCreateNewActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
/**
* @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(ManagerScreen.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(ManagerScreen.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(ManagerScreen.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(ManagerScreen.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 ManagerScreen().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JPanel DynamicPanel;
private javax.swing.JButton MSCreateNew;
private javax.swing.JButton MSQuotation;
private javax.swing.JButton MSReport;
private javax.swing.JButton MSReserve;
private javax.swing.JButton MSSalCom;
private javax.swing.JButton MSbuy;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
// End of variables declaration
}
我的问题是在JFrame中包含两个按钮的BR面板（buyReserve（））应该可以从DynamicPanel（）中调用buy面板或brep面板（BuyReport（））或者至少那就是我的想法，如果这是有道理的。
所以基本上我已经尝试了一些事情，包括以下内容：
package route66.pannels;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import route66.pannels.BuyReport;
import route66.pannels.CustomerDetails;
/**
*
* @author Vavu
*/
public class BuyReserve extends javax.swing.JPanel {
GridBagLayout layout = new GridBagLayout();
Buy BuyPanel = new Buy();
Buy b = new Buy();
BuyReserve buyR = new BuyReserve();
BuyReport brep = new BuyReport();
CustomerDetails cusD = new CustomerDetails();
QuotPanel QP = new QuotPanel();
ReportPanel RP = new ReportPanel();
NewUser NW = new NewUser();
Salaries_Com SalCom = new Salaries_Com();
SaleSucces SalS = new SaleSucces();
/**
* Creates new form BuyReserve
*/
public BuyReserve() {
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() {
btnBuy = new javax.swing.JButton();
btnReserve = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
btnBuy.setText("New Client");
btnBuy.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnBuyActionPerformed(evt);
}
});
btnReserve.setText("Reserve Client");
jLabel1.setText("Select Option");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(144, 144, 144)
.addComponent(btnBuy)
.addGap(35, 35, 35)
.addComponent(btnReserve))
.addGroup(layout.createSequentialGroup()
.addGap(230, 230, 230)
.addComponent(jLabel1)))
.addContainerGap(162, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(62, 62, 62)
.addComponent(jLabel1)
.addGap(72, 72, 72)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(btnBuy)
.addComponent(btnReserve))
.addContainerGap(201, Short.MAX_VALUE))
);
}// </editor-fold>
private void btnBuyActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
b.setVisible(true);
}
// Variables declaration - do not modify
private javax.swing.JButton btnBuy;
private javax.swing.JButton btnReserve;
private javax.swing.JLabel jLabel1;
// End of variables declaration
}
如果我运行包含第二个代码段的ManagerScreen，则会出错。我还尝试了其他类型的代码，最终说像jpanel这样的东西没有主类等等。
所以，希望在这个阶段，我能够得到我的观点，能够再次提出问题;如何在JFrame内的面板内调用面板？
答案 0 :(得分：3)
你说你要打电话＆＃34; JPanels，但这并没有任何意义。如果您的目标是交换 JPanel视图，那么最简单和最简单的方法是使用CardLayout。有关此有用工具的更多信息，请参阅CardLayout Tutorial。
例如：
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import javax.swing.*;
public class ManagerPanel extends JPanel {
private CardLayout cardLayout = new CardLayout();
private JPanel cardLayoutPanel = new JPanel(cardLayout);
private BuyPanel buyPanel = new BuyPanel(this);
private BuyReportPanel buyReportPanel = new BuyReportPanel(this);
private DefaultComboBoxModel<String> comboModel = new DefaultComboBoxModel<>();
private JComboBox<String> panelComboBox = new JComboBox<>(comboModel);
public ManagerPanel() {
comboModel.addElement(BuyPanel.BUY);
comboModel.addElement(BuyReportPanel.BUY_REPORT);
panelComboBox.addActionListener(evt -> {
String key = panelComboBox.getSelectedItem().toString();
cardLayout.show(cardLayoutPanel, key);
});
JPanel comboPanel = new JPanel();
comboPanel.add(panelComboBox);
cardLayoutPanel.add(buyPanel, BuyPanel.BUY);
cardLayoutPanel.add(buyReportPanel, BuyReportPanel.BUY_REPORT);
setLayout(new BorderLayout());
add(cardLayoutPanel, BorderLayout.CENTER);
add(comboPanel, BorderLayout.PAGE_END);
}
private static void createAndShowGui() {
ManagerPanel mainPanel = new ManagerPanel();
JFrame frame = new JFrame("ManagerPanel");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> createAndShowGui());
}
public void nextPanel() {
cardLayout.next(cardLayoutPanel);
}
}
class BuyReportPanel extends JPanel {
public final static String BUY_REPORT = "Buy Report";
private ManagerPanel managerPanel;
public BuyReportPanel(ManagerPanel managerPanel) {
this.managerPanel = managerPanel;
add(new JLabel(BUY_REPORT), SwingConstants.CENTER);
add(new JButton(new NextPanelAction(managerPanel)));
}
}
class BuyPanel extends JPanel {
public final static String BUY = "Buy";
private ManagerPanel managerPanel;
public BuyPanel(ManagerPanel managerPanel) {
setPreferredSize(new Dimension(400, 300));
this.managerPanel = managerPanel;
add(new JLabel(BUY), SwingConstants.CENTER);
add(new JButton(new NextPanelAction(managerPanel)));
}
}
class NextPanelAction extends AbstractAction {
private ManagerPanel managerPanel;
public NextPanelAction(ManagerPanel managerPanel) {
super("Next Panel");
this.managerPanel = managerPanel;
}
@Override
public void actionPerformed(ActionEvent e) {
managerPanel.nextPanel();
}
}
请注意，我已经将我的主要类（在此处为ManagerPanel）传递到其他类中，因此他们可以根据需要调用其任何公共方法，包括nextPanel()。