为什么应用于一张表的 Dimension 会影响两个 JTable？

Question

我有 2 个

JTable

，都放置在自己的

FastScrollPane

中，并将它们的滚动窗格放置到

JPanel

中，然后将它们都放置到

JPanel

中。我在

.setPreferredScrollableViewportSize(dimensionPrameters)

中放置了不同的对象作为参数，但是，两个表往往具有相同的大小。

我怎样才能让他们完全独立？

代码：

Dimension dimensionPayments = new Dimension(600, 60);

table1.setPreferredScrollableViewportSize(table1.getPreferredSize());
table2.setPreferredScrollableViewportSize(dimensionPayments);

FastScrollPane fastScrollPane1 = new FastScrollPane(table1);
fastScrollPane1.setAlignmentX(JComponent.LEFT_ALIGNMENT);

FastScrollPane fastScrollPane2 = new FastScrollPane(table2);
fastScrollPane2.setAlignmentX(JComponent.LEFT_ALIGNMENT);

firstPanel.add(fastScrollPane1);
firstPanel.setLayout(new BoxLayout(secondPanel, BoxLayout.X_AXIS));

secondPanel.add(fastScrollPane2);
secondPanel.setLayout(new BoxLayout(secondPanel, BoxLayout.X_AXIS));

allPanel.add(firstPanel);
allPanel.add(secondPanel);

在图像中，我试图避免的效果被圈出。

为了获得最小的可重现示例，请检查以下代码：

import javax.swing.*;
import javax.swing.event.TableModelListener;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
import javax.swing.text.DefaultFormatterFactory;
import javax.swing.text.MaskFormatter;
import java.awt.*;
import java.awt.event.*;
import java.text.ParseException;


public class CfgTrafficProvidersBoxTest extends JPanel {

  private static final long serialVersionUID = 1500904348023955658L;

  private JTable changeTrafficProviderTable;
  private JTable changeTrafficProviderPaymentsTable;

  private final String PRICE_FORMAT = "#.####";

  public JButton addBtn;
  public JButton addPaymentBtn;
  public JButton saveBtn;
  public JLabel addTrafficProviderServiceLabel;
  public JLabel addTrafficProviderPaymentLabel;
  private long editId = -1;


  CfgTrafficProvidersBoxTest() {
    createGUIElements();
  }

  public void createGUIElements() {

    JPanel allAndSavePanel = new JPanel();
    allAndSavePanel.setLayout(new BoxLayout(allAndSavePanel, BoxLayout.Y_AXIS));

    JPanel allPanel = new JPanel();
    allPanel.setLayout(new GridLayout(0,1));

    JPanel firstPanel = new JPanel();
    firstPanel.setLayout(new GridLayout(0,1));
    firstPanel.setAlignmentX(JComponent.LEFT_ALIGNMENT);

    addTrafficProviderServiceLabel = new JLabel("Add Service");
    addTrafficProviderPaymentLabel = new JLabel("Add Payment");

    firstPanel.add(addTrafficProviderServiceLabel);
    allPanel.add(firstPanel);

    JPanel secondPanel = new JPanel();
    secondPanel.setLayout(new BoxLayout(secondPanel, BoxLayout.X_AXIS));
    changeTrafficProviderTable = new JTable();
    changeTrafficProviderTable.setModel(new TableModel()  {
      @Override
      public int getRowCount() {
        return 0;
      }

      @Override
      public int getColumnCount() {
        return 6;
      }

      @Override
      public String getColumnName(int columnIndex) {
        return "name"+columnIndex;
      }

      @Override
      public Class<?> getColumnClass(int columnIndex) {
        return String.class;
      }

      @Override
      public boolean isCellEditable(int rowIndex, int columnIndex) {
        return true;
      }

      @Override
      public Object getValueAt(int rowIndex, int columnIndex) {
        return "aa";
      }

      @Override
      public void setValueAt(Object aValue, int rowIndex, int columnIndex) {

      }

      @Override
      public void addTableModelListener(TableModelListener l) {

      }

      @Override
      public void removeTableModelListener(TableModelListener l) {

      }
    });

    JScrollPane fastScrollPane = new JScrollPane(changeTrafficProviderTable);
    fastScrollPane.setAlignmentX(JComponent.LEFT_ALIGNMENT);

    secondPanel.add(fastScrollPane);
    secondPanel.setLayout(new BoxLayout(secondPanel, BoxLayout.X_AXIS));

    Dimension dimension = new Dimension(600, 20);
    Dimension dimensionPayments = new Dimension(600, 60);

    changeTrafficProviderTable.setPreferredScrollableViewportSize(dimension);

    addBtn = new JButton("X");
    addBtn.setAlignmentX(JComponent.RIGHT_ALIGNMENT);
    secondPanel.add(addBtn);

    allPanel.add(secondPanel);

    saveBtn = new JButton("SAVE");
    changeTrafficProviderTable.setCellSelectionEnabled(false);
    changeTrafficProviderTable.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);

    JPanel thirdPanel = new JPanel();
    thirdPanel.setLayout(new GridLayout(0,1));
    thirdPanel.setAlignmentX(JComponent.LEFT_ALIGNMENT);

    thirdPanel.add(addTrafficProviderPaymentLabel);
    allPanel.add(thirdPanel);

    JPanel forthPanel = new JPanel();
    forthPanel.setLayout(new BoxLayout(forthPanel, BoxLayout.X_AXIS));

    changeTrafficProviderPaymentsTable = new JTable();
    changeTrafficProviderPaymentsTable.setPreferredScrollableViewportSize(dimensionPayments);
    changeTrafficProviderPaymentsTable.setModel(new TableModel()  {
      @Override
      public int getRowCount() {
        return 1;
      }

      @Override
      public int getColumnCount() {
        return 6;
      }

      @Override
      public String getColumnName(int columnIndex) {
        return "name"+columnIndex;
      }

      @Override
      public Class<?> getColumnClass(int columnIndex) {
        return String.class;
      }

      @Override
      public boolean isCellEditable(int rowIndex, int columnIndex) {
        return true;
      }

      @Override
      public Object getValueAt(int rowIndex, int columnIndex) {
        return "aa";
      }

      @Override
      public void setValueAt(Object aValue, int rowIndex, int columnIndex) {

      }

      @Override
      public void addTableModelListener(TableModelListener l) {

      }

      @Override
      public void removeTableModelListener(TableModelListener l) {

      }
    });

    JScrollPane fastScrollPanePayments = new JScrollPane(changeTrafficProviderPaymentsTable);
    fastScrollPanePayments.setAlignmentX(JComponent.LEFT_ALIGNMENT);
    fastScrollPanePayments.setVerticalScrollBar(fastScrollPane.getVerticalScrollBar());
    forthPanel.add(fastScrollPanePayments);

    addPaymentBtn = new JButton("XX");
    addPaymentBtn.setAlignmentX(JComponent.RIGHT_ALIGNMENT);

    forthPanel.add(addPaymentBtn);
    allPanel.add(forthPanel);

    allAndSavePanel.add(allPanel);
    saveBtn.setAlignmentX(Component.LEFT_ALIGNMENT);

    Box b = Box.createHorizontalBox();
    b.add(saveBtn);
    b.add(Box.createHorizontalGlue());
    allAndSavePanel.add(b);
    this.add(allAndSavePanel);
  }


  public static void main(final String[] args) {
    final JFrame frame = new JFrame();
    frame.getContentPane().add(new CfgTrafficProvidersBoxTest());
    frame.pack();
    frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    SwingUtilities.invokeLater(new Runnable() {

      @Override
      public void run() {
        frame.setVisible(true);
      }
    });
  }

}

和图像：

注意

Dimension dimension = new Dimension(600, 20);
Dimension dimensionPayments = new Dimension(600, 60);

适用于两个不同的表

  [1]: https://i.stack.imgur.com/X3BFk.png

Answer 1

不知道为什么代码要实现TableModel。举一个简单的例子，只需一条语句即可创建一个 TableModel。只需使用

table.setModel( new DefaultTabelModel(1, 5) );

另外，不知道为什么要创建一个面板来保存每个标签。您在评论中指出您需要一个面板，因为表格右侧有一个按钮。好吧，标签没有按钮，所以不需要面板。保持代码简单。跟踪您创建的所有不必要的面板太困难了。

但是，两张桌子的尺寸往往相同。

这是你的基本代码：

JPanel allPanel = new JPanel();
allPanel.setLayout(new GridLayout(0,1));

....
allPanel.add(firstPanel);

...
allPanel.add(secondPanel);

...
allPanel.add(thirdPanel);

...
allPanel.add(forthPanel);

allPanel 使用 GridLayout。 GridLayout 将使所有组件具有相同的大小。所以每个组件的大小将是最大表的大小。

这也是标签和表格之间有空间的原因。

不要使用网格布局。而是使用垂直 BoxLayout 或 GridBagLayout。