不能列的宽度设置为零，即不进行列隐形

Question

我试图从JTable使一列，通过设置宽度为零无形的，但它可能不会发生，但仍可见宽度= 15.这是代码 -

public void restoreColumnWithWidth(int column, int width) { 
     try { 
      TableColumn tableColumn = table.getColumnModel().getColumn(column); 
      table.getTableHeader().setResizingColumn(tableColumn); 
      tableColumn.setWidth(width); 
      tableColumn.setMaxWidth(width); 
      tableColumn.setMinWidth(width); 
      tableColumn.setPreferredWidth(width); 
     } catch (Exception ex) { 
     } 
    } 

代码有什么问题？

Answer 1

• 没有，从来没有删除从TableModelTableColumn，这是错误的建议，而不是要使用内置的方法JTable#removeColumn(TableColumn aColumn)，

• 通知，这种方法只从视图中删除列，在模型删除列仍然存在，你可以恢复，通过使用，可见删除列JTable#addColumn(TableColumn aColumn)

编辑

import java.awt.BorderLayout; 
import java.awt.EventQueue; 
import java.awt.Font; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.util.Stack; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.JScrollPane; 
import javax.swing.JTable; 
import javax.swing.WindowConstants; 
import javax.swing.table.DefaultTableModel; 
import javax.swing.table.TableColumn; 
import javax.swing.table.TableColumnModel; 

public class TableRowHeight { 

    private static final long serialVersionUID = 1L; 
    private JFrame frame = new JFrame("p*s*s*s*s*t*t"); 
    private String[] columnNames = {"one", "two", "Playing with", "four", "five",}; 
    private String[][] data = { 
     {"aaaaaa", "bbbbbb", "cccccc", "dddddd", "eeeeeee",}, 
     {"bbbbbb", "cccccc", "dddddd", "eeeeeee", "aaaaaa",}, 
     {"cccccc", "dddddd", "eeeeeee", "aaaaaa", "bbbbbb",}, 
     {"dddddd", "eeeeeee", "aaaaaa", "bbbbbb", "cccccc",}, 
     {"eeeeeee", "aaaaaa", "bbbbbb", "cccccc", "dddddd",}}; 
    private JTable table = new JTable(new DefaultTableModel(data, columnNames)); 
    private TableColumnModel tcm = table.getColumnModel(); 
    private Stack<TableColumn> colDeleted = new Stack<TableColumn>(); 
    private JButton restoreButton = new JButton("Restore Column Size"); 
    private JButton hideButton = new JButton("Set Column Size to Zero"); 
    private JButton deleteButton = new JButton("Delete Column"); 
    private JButton addButton = new JButton("Restore Column"); 

    public TableRowHeight() { 
     table.setRowMargin(4); 
     table.setRowHeight(30); 
     table.setFont(new Font("SansSerif", Font.BOLD + Font.PLAIN, 20)); 
     JScrollPane scrollPane = new JScrollPane(table); 
     for (int i = 0; i < (tcm.getColumnCount()); i++) { 
      tcm.getColumn(i).setPreferredWidth(100); 
     } 
     table.setPreferredScrollableViewportSize(table.getPreferredSize()); 
     restoreButton.addActionListener(new ActionListener() { 

      public void actionPerformed(ActionEvent e) { 
       tcm.getColumn(2).setPreferredWidth(100); 
      } 
     }); 
     hideButton.addActionListener(new ActionListener() { 

      public void actionPerformed(ActionEvent e) { 
       tcm.getColumn(2).setPreferredWidth(000); 
      } 
     }); 
     deleteButton.addActionListener(new ActionListener() { 

      public void actionPerformed(ActionEvent e) { 
       if (table.getColumnCount() > 0) { 
        TableColumn colToDelete = table.getColumnModel().getColumn(table.getColumnCount() - 1); 
        table.removeColumn(colToDelete); 
        table.validate(); 
        colDeleted.push(colToDelete); 
        addButton.setEnabled(true); 
       } else { 
        deleteButton.setEnabled(false); 
       } 
      } 
     }); 
     addButton.addActionListener(new ActionListener() { 

      public void actionPerformed(ActionEvent e) { 
       if (colDeleted.size() > 0) { 
        table.addColumn(colDeleted.pop()); 
        table.validate(); 
        deleteButton.setEnabled(true); 
       } else { 
        addButton.setEnabled(false); 
       } 
      } 
     }); 
     JPanel btnPanel = new JPanel(); 
     btnPanel.add(hideButton); 
     btnPanel.add(restoreButton); 
     btnPanel.add(deleteButton); 
     btnPanel.add(addButton); 
     frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); 
     frame.add(scrollPane, BorderLayout.CENTER); 
     frame.add(btnPanel, BorderLayout.SOUTH); 
     frame.pack(); 
     frame.setLocation(150, 150); 
     frame.setVisible(true); 
    } 

    public static void main(String[] args) { 
     EventQueue.invokeLater(new Runnable() { 

      public void run() { 
       TableRowHeight frame = new TableRowHeight(); 
      } 
     }); 
    } 
} 

EDIT2

你必须检查过

JTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
JTable.getTableHeader().setReorderingAllowed(false); 

Answer 2

如果它应该被删除，而不是只是被隐藏了：从表模型删除它。 如果它只应被隐藏并稍后显示，您可以从TableColumnModel删除TableColumn

使列高度0有点虚假。