JTable autoresize，扭曲？

Question

这是JTable的一个众所周知的autoresizer：

public JTable autoResizeColWidth(JTable table, DefaultTableModel model) { 
     table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
     table.setModel(model); 

     int margin = 5; 

     for (int i = 0; i < table.getColumnCount(); i++) { 
      int      vColIndex = i; 
      DefaultTableColumnModel colModel = (DefaultTableColumnModel) table.getColumnModel(); 
      TableColumn    col  = colModel.getColumn(vColIndex); 
      int      width  = 0; 

      // Get width of column header 
      TableCellRenderer renderer = col.getHeaderRenderer(); 

      if (renderer == null) { 
       renderer = table.getTableHeader().getDefaultRenderer(); 
      } 

      Component comp = renderer.getTableCellRendererComponent(table, col.getHeaderValue(), false, false, 0, 0); 

      width = comp.getPreferredSize().width; 

      // Get maximum width of column data 
      for (int r = 0; r < table.getRowCount(); r++) { 
       renderer = table.getCellRenderer(r, vColIndex); 
       comp  = renderer.getTableCellRendererComponent(table, table.getValueAt(r, vColIndex), false, false, 
         r, vColIndex); 
       width = Math.max(width, comp.getPreferredSize().width); 
      } 

      // Add margin 
      width += 2 * margin; 

      // Set the width 
      col.setPreferredWidth(width); 
     } 

     ((DefaultTableCellRenderer) table.getTableHeader().getDefaultRenderer()).setHorizontalAlignment(
      SwingConstants.LEFT); 

     // table.setAutoCreateRowSorter(true); 
     table.getTableHeader().setReorderingAllowed(false); 

     return table; 
    } 

这里的问题是，返回的表收缩（宽）

所以，如果我的JTable组件是100％，返回的列区域可能只是70％（说）

如果我想自动调整大小，请记住JTable的原始设置宽度作为一个整体。所以，即使在调整大小后，所有的列都适合。

Answer 1

我已成功地改进，才能考虑表的大小，上面的代码：

public static void resizeTable(JTable table) { 
    int margin = 5; 
    int tableWidth = 0; 
    for (int i = 0; i < table.getColumnCount(); i++) { 
     int vColIndex = i; 
     TableColumn col = table.getColumnModel().getColumn(vColIndex); 
     int width = 0; 
     // Get width of column header 
     TableCellRenderer renderer = col.getHeaderRenderer(); 
     if (renderer == null) { 
      renderer = table.getTableHeader().getDefaultRenderer(); 
     } 
     Component comp = renderer.getTableCellRendererComponent(table, col.getHeaderValue(), false, false, 0, 0); 
     width = comp.getPreferredSize().width; 
     // Get maximum width of column data 
     for (int r = 0; r < table.getRowCount(); r++) { 
      renderer = table.getCellRenderer(r, vColIndex); 
      comp = renderer.getTableCellRendererComponent(table, table.getValueAt(r, vColIndex), false, false, 
        r, vColIndex); 
      width = Math.max(width, comp.getPreferredSize().width); 
     } 
     // Add margin 
     width += 2 * margin; 
     // Set the width 
     col.setPreferredWidth(width); 
     tableWidth += width; 
    } 

    if (tableWidth < table.getParent().getWidth()) { 
     tableWidth = table.getParent().getWidth(); 
     for (int i = 0; i < table.getColumnCount(); i++) { 
      int vColIndex = i; 
      TableColumn col = table.getColumnModel().getColumn(vColIndex); 
      int width = 0; 
      // Get width of column header 
      TableCellRenderer renderer = col.getHeaderRenderer(); 
      if (renderer == null) { 
       renderer = table.getTableHeader().getDefaultRenderer(); 
      } 
      Component comp = renderer.getTableCellRendererComponent(table, col.getHeaderValue(), false, false, 0, 0); 
      width = comp.getPreferredSize().width; 
      // Get maximum width of column data 
      for (int r = 0; r < table.getRowCount(); r++) { 
       renderer = table.getCellRenderer(r, vColIndex); 
       comp = renderer.getTableCellRendererComponent(table, table.getValueAt(r, vColIndex), false, false, 
         r, vColIndex); 
       width = Math.max(width, comp.getPreferredSize().width); 
      } 
      // Add margin 
      width += 2 * margin; 

      // Set the width based on table width 
      if (width < tableWidth/(table.getColumnCount() - i)) { 
       width = tableWidth/(table.getColumnCount() - i); 
      } 
      tableWidth -= width; 
      col.setPreferredWidth(width); 
     } 
    } 
} 

注意，在表中的数据循环执行两次。另外，我更喜欢该函数独立于JTable实例，以便能够从我的项目中的任何JTable调用它。