Добавление области прокрутки в GridBagLayout

Question

Я пытаюсь добавить две панели прокрутки вместе с одной меткой и одной кнопкой в ​​JPanel с помощью GridBagLayout. В то время как первая панель прокрутки содержит JList и вторую панель прокрутки, содержащую JTable. Ниже приведен код:

JPanel capabilityPanel = new JPanel(new GridBagLayout()); 
    GridBagConstraints constraints = new GridBagConstraints(); 

    JScrollPane capabilityScrollPane = new JScrollPane(cbList, 
      ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, 
      ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS); 


    JScrollPane capabilityTableScrollPane = new JScrollPane(table, 
      ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, 
      ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS); 

    JButton saveButton = new JButton("Save Table Values"); 

    JLabel capabilityLabel = new JLabel("Boolean Capability List"); 
    constraints.fill = GridBagConstraints.HORIZONTAL; 
    constraints.gridx = 0; 
    constraints.gridy = 0; 
    capabilityPanel.add(capabilityLabel, constraints); 

    constraints.gridx = 1; 
    constraints.gridy = 0; 
    capabilityPanel.add(capabilityScrollPane,constraints); 

    constraints.gridx = 0; 
    constraints.gridy = 1; 
    capabilityPanel.add(saveButton, constraints); 

    constraints.gridx = 1; 
    constraints.gridy = 1; 
    capabilityPanel.add(capabilityTableScrollPane, constraints); 

Проблема заключается в том, когда я непосредственно при добавлении таблицы в панели вместо соответствующей панели прокрутки, он правильно отображать на экране. Но когда я добавляю панель прокрутки, отображается только три элемента, таблица вообще не отображается. Я хочу, чтобы таблица отображалась с помощью прокрутки.

Не могли бы вы помочь мне в этой ситуации?

Answer 1

Это создаст один outerpanel
два внутренней панели
один для списка
Один за столом
Layout

пакет новыйПакет;

public class NewJFrame extends javax.swing.JFrame { 

/** 
* Creates new form NewJFrame 
*/ 
public NewJFrame() { 
    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() { 

    outerPanel = new javax.swing.JPanel(); 
    listPanel = new javax.swing.JPanel(); 
    jLabel1 = new javax.swing.JLabel(); 
    jScrollPane1 = new javax.swing.JScrollPane(); 
    jList1 = new javax.swing.JList(); 
    tablePanel = new javax.swing.JPanel(); 
    jScrollPane2 = new javax.swing.JScrollPane(); 
    jTable1 = new javax.swing.JTable(); 
    jButton1 = new javax.swing.JButton(); 

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

    outerPanel.setLayout(new java.awt.BorderLayout()); 

    jLabel1.setText("Boolean Capability List"); 

    jList1.setModel(new javax.swing.AbstractListModel() { 
     String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5", "Item 1", "Item 2", "Item 3", "Item 4", "Item 5", "Item 1", "Item 2", "Item 3", "Item 4", "Item 5", " " }; 
     public int getSize() { return strings.length; } 
     public Object getElementAt(int i) { return strings[i]; } 
    }); 
    jScrollPane1.setViewportView(jList1); 

    javax.swing.GroupLayout listPanelLayout = new javax.swing.GroupLayout(listPanel); 
    listPanel.setLayout(listPanelLayout); 
    listPanelLayout.setHorizontalGroup(
     listPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(listPanelLayout.createSequentialGroup() 
      .addComponent(jLabel1) 
      .addGap(0, 177, Short.MAX_VALUE)) 
     .addComponent(jScrollPane1) 
    ); 
    listPanelLayout.setVerticalGroup(
     listPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(listPanelLayout.createSequentialGroup() 
      .addComponent(jLabel1) 
      .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
      .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
      .addGap(0, 15, Short.MAX_VALUE)) 
    ); 

    outerPanel.add(listPanel, java.awt.BorderLayout.NORTH); 

    jTable1.setModel(new javax.swing.table.DefaultTableModel(
     new Object [][] { 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null}, 
      {null, null, null, null} 
     }, 
     new String [] { 
      "Title 1", "Title 2", "Title 3", "Title 4" 
     } 
    )); 
    jScrollPane2.setViewportView(jTable1); 

    jButton1.setText("Save Values"); 

    javax.swing.GroupLayout tablePanelLayout = new javax.swing.GroupLayout(tablePanel); 
    tablePanel.setLayout(tablePanelLayout); 
    tablePanelLayout.setHorizontalGroup(
     tablePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(tablePanelLayout.createSequentialGroup() 
      .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 303, javax.swing.GroupLayout.PREFERRED_SIZE) 
      .addGap(0, 0, Short.MAX_VALUE)) 
     .addGroup(tablePanelLayout.createSequentialGroup() 
      .addGap(101, 101, 101) 
      .addComponent(jButton1) 
      .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
    ); 
    tablePanelLayout.setVerticalGroup(
     tablePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(tablePanelLayout.createSequentialGroup() 
      .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 201, javax.swing.GroupLayout.PREFERRED_SIZE) 
      .addGap(27, 27, 27) 
      .addComponent(jButton1) 
      .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
    ); 

    outerPanel.add(tablePanel, java.awt.BorderLayout.SOUTH); 

    getContentPane().add(outerPanel, java.awt.BorderLayout.CENTER); 

    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(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (InstantiationException ex) { 
     java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (IllegalAccessException ex) { 
     java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (javax.swing.UnsupportedLookAndFeelException ex) { 
     java.util.logging.Logger.getLogger(NewJFrame.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 NewJFrame().setVisible(true); 
     } 
    }); 
} 

// Variables declaration - do not modify      
private javax.swing.JButton jButton1; 
private javax.swing.JLabel jLabel1; 
private javax.swing.JList jList1; 
private javax.swing.JScrollPane jScrollPane1; 
private javax.swing.JScrollPane jScrollPane2; 
private javax.swing.JTable jTable1; 
private javax.swing.JPanel listPanel; 
private javax.swing.JPanel outerPanel; 
private javax.swing.JPanel tablePanel; 
// End of variables declaration     
} 

Выходной