JFrameにあるJPanelからJPanelを呼び出す - ネットバンで

Question

（編集済み）

私は動的にパネルを変更して小さなプロジェクトを作成しています。

私は、JFrame（ManagerScreen）内のボタンからアクションイベントを使用してJPanelを呼び出すことができるコードを記述することができました。例えば：

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     

}

私の問題であるBRパネル（buyReserve（））と、2つのボタンを含む - JFrameの内、購入パネルやBREPパネルのいずれかを呼び出すことができるようになっています（BuyReport（））をDynamicPanel（）内から呼び出すか、少なくとも私が思うところであれば、それは意味があります。以下を含む

ので、基本的に私が試した代：私は2番目のコードスニペットを含めてManagerScreenを実行した場合

}

私はエラーを取得します。私はまた、jpanelにメインクラスnがないようなことを言ってしまう他のタイプのコードも試しました。

だから、この段階では、私は、（再び）尋ねることができるように私のポイントを得ることができたと思います。 JFrame内のパネル内でパネルを呼び出すにはどうすればよいですか？

Answer 1

あなたはJPanelsを "呼び出す"と述べていますが、実際には意味がありません。あなたの目標がスワップ JPanelの場合は、最も簡単で簡単な方法は、CardLayoutを使用することです。この便利なツールの詳細については、CardLayout Tutorialをご覧ください。例えば

：私は他のクラスに、ここに私のメインクラス、ManagerPanelを通過してきたし、必要に応じので、彼らは、nextPanel()含むそのパブリックメソッドを呼び出すことができます

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(); 
    } 
} 

注意。