如何在JTable而不是列标题上显示行标题

我怎样才能显示我的Jtable …

目前我只知道创造这种jtable

下面是我的代码

这里

Object rowData1[][] = { { "","","","" }, { "","","","" }, { "","","","" }, { "","","","" } }; Object columnNames1[] = { "HEADER 1", "HEADER 2", "HEADER 3", "HEADER 4" }; JTable table1 = new JTable(rowData1, columnNames1); table1.getColumnModel().getColumn(0).setPreferredWidth(120); JScrollPane scrollPane1 = new JScrollPane(table1); 

Answer 1

这只是一个概念certificate

免责声明：在我收到一堆讨厌的邮件之前，我已经做了很多可怕的事情来完成这项工作，我直接从源头偷走了大部分的绘画代码，这就是它在外观和感觉中的实际效果。代码本身：P

我也去了n度，这意味着我确实假设你想让行标题看起来像列标题。 如果这不是一项要求，那将会更容易……

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好的，这是概念的基本certificate，它提供了生成行标题并以与正常方式相同的方式呈现它们的方法，就像行标题一样。

需要添加/支持的事情：

• 检测表模型何时更改（即，将新表模型设置为表）
• 检测列模型何时更改（即，将新列模型设置为表）

大部分function可能需要添加到TableWithRowHeader实现中……

基本上，这个“尝试”做的是创建一个基于JTableHeader的自定义行标题，删除现有的列标题并将其自身添加到封闭的JScrollPane的行标题视图位置。

 import java.awt.BorderLayout; import java.awt.Component; import java.awt.Container; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.GridBagConstraints; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JViewport; import javax.swing.SwingUtilities; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; import javax.swing.event.ChangeEvent; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; import javax.swing.event.TableColumnModelEvent; import javax.swing.event.TableColumnModelListener; import javax.swing.table.DefaultTableColumnModel; import javax.swing.table.JTableHeader; import javax.swing.table.TableCellRenderer; import javax.swing.table.TableColumn; import javax.swing.table.TableColumnModel; public class TableRowHeaderTest { public static void main(String[] args) { new TableRowHeaderTest(); } public TableRowHeaderTest() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { ex.printStackTrace(); } Object rowData1[][] = { {"", "", "", ""}, {"", "", "", ""}, {"", "", "", ""}, {"", "", "", ""} }; Object columnNames1[] = {"HEADER 1", "HEADER 2", "HEADER 3", "HEADER 4"}; JTable table1 = new TableWithRowHeader(rowData1, columnNames1); table1.getColumnModel().getColumn(0).setPreferredWidth(120); JScrollPane scrollPane1 = new JScrollPane(table1); scrollPane1.setColumnHeaderView(null); JFrame frame = new JFrame("Testing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(scrollPane1); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public class TableWithRowHeader extends JTable { private TableRowHeader rowHeader; public TableWithRowHeader(final Object[][] rowData, final Object[] columnNames) { super(rowData, columnNames); rowHeader = new TableRowHeader(this); } @Override protected void configureEnclosingScrollPane() { // This is required as it calls a private method... super.configureEnclosingScrollPane(); Container parent = SwingUtilities.getUnwrappedParent(this); if (parent instanceof JViewport) { JViewport port = (JViewport) parent; Container gp = port.getParent(); if (gp instanceof JScrollPane) { JScrollPane scrollPane = (JScrollPane) gp; JViewport viewport = scrollPane.getViewport(); if (viewport == null || SwingUtilities.getUnwrappedView(viewport) != this) { return; } scrollPane.setColumnHeaderView(null); scrollPane.setRowHeaderView(rowHeader); } } } } public class TableRowHeader extends JTableHeader { private JTable table; public TableRowHeader(JTable table) { super(table.getColumnModel()); this.table = table; table.getColumnModel().addColumnModelListener(new TableColumnModelListener() { @Override public void columnAdded(TableColumnModelEvent e) { repaint(); } @Override public void columnRemoved(TableColumnModelEvent e) { repaint(); } @Override public void columnMoved(TableColumnModelEvent e) { repaint(); } @Override public void columnMarginChanged(ChangeEvent e) { repaint(); } @Override public void columnSelectionChanged(ListSelectionEvent e) { // Don't care about this, want to highlight the row... } }); table.getSelectionModel().addListSelectionListener(new ListSelectionListener() { @Override public void valueChanged(ListSelectionEvent e) { repaint(); } }); } public JTable getTable() { return table; } @Override public Dimension getPreferredSize() { Dimension size = new Dimension(); JTable table = getTable(); if (table != null) { TableColumnModel model = table.getColumnModel(); if (model != null) { for (int index = 0; index < model.getColumnCount(); index++) { TableColumn column = model.getColumn(index); TableCellRenderer renderer = column.getHeaderRenderer(); if (renderer == null) { renderer = getDefaultRenderer(); } Component comp = renderer.getTableCellRendererComponent(table, column.getHeaderValue(), false, false, -1, index); size.width = Math.max(comp.getPreferredSize().width, size.width); size.height += table.getRowHeight(index); } } } return size; } /** * Overridden to avoid propagating a invalidate up the tree when the * cell renderer child is configured. */ @Override public void invalidate() { } /** * If the specified component is already a child of this then we don't bother doing anything - stacking order doesn't matter for cell renderer components * (CellRendererPane doesn't paint anyway). */ @Override protected void addImpl(Component x, Object constraints, int index) { if (x.getParent() == this) { return; } else { super.addImpl(x, constraints, index); } } @Override protected void paintComponent(Graphics g) { // super.paintComponent(g); Graphics2D g2d = (Graphics2D) g.create(); g2d.setColor(getBackground()); g2d.fillRect(0, 0, getWidth(), getHeight()); JTable table = getTable(); if (table != null) { int width = getWidth(); TableColumnModel model = table.getColumnModel(); if (model != null) { for (int index = 0; index < model.getColumnCount(); index++) { TableColumn column = model.getColumn(index); TableCellRenderer renderer = column.getHeaderRenderer(); if (renderer == null) { renderer = getDefaultRenderer(); } boolean selected = table.getSelectedRow() == index; Component comp = renderer.getTableCellRendererComponent(table, column.getHeaderValue(), selected, false, 0, index); add(comp); comp.validate(); int height = table.getRowHeight(index) - 1; comp.setBounds(0, 0, width, height); comp.paint(g2d); comp.setBounds(-width, -height, 0, 0); g2d.setColor(table.getGridColor()); g2d.drawLine(0, height, width, height); g2d.translate(0, height + 1); } } } g2d.dispose(); removeAll(); } } } 

免责声明：这可能会在你脸上爆炸。 我没有做任何检查，以防止标题响应列行排序的变化和...理论上...它不应该尝试“调整”列，但我没有测试...