从JTable获取DefaultTableModel [英] Get DefaultTableModel from JTable

问题描述

我想从JTable获取DefaultTableModel，然后向其中添加Column. 我在JTable中搜索，但仅找到getModel()方法，然后无法在其中添加Column. 最后，我使用Binding方法在JTable中设置日期，然后没有DefaultTableModel，我想将列内容JButton添加到我的JTable中.

I want get DefaultTableModel from JTable and then add Column to that. I search in JTable but Only find getModel() method.Then can't add Column to that. In end say I use Binding method for set Date in JTable then haven't DefaultTableModel and I want add Column content JButton add to My JTable.

推荐答案

再次

• ，确定不能添加新的基于 DefaultTableModel 的JTable a>源自myTable.getModel()

  • again, are you sure that you can't to add a new TableColumn to JTable based on DefaultTableModel initalized from myTable.getModel()

    EDIT现在，我无需转换即可看到(DefaultTableModel model = (DefaultTableModel) table.getModel();) JTable可以返回

    EDIT Now I can see without casting (DefaultTableModel model = (DefaultTableModel) table.getModel();) JTable can returns TableModel, and there isn't addColumn()

    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");
        private JButton addNewButton = new JButton("Add New Column");
        private int i = 1;
    
        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(150);
            }
            table.setPreferredScrollableViewportSize(table.getPreferredSize());
            restoreButton.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    tcm.getColumn(2).setPreferredWidth(100);
                }
            });
            hideButton.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    tcm.getColumn(2).setPreferredWidth(000);
                }
            });
            deleteButton.addActionListener(new ActionListener() {
                @Override
                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() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    if (colDeleted.size() > 0) {
                        table.addColumn(colDeleted.pop());
                        table.validate();
                        deleteButton.setEnabled(true);
                    } else {
                        addButton.setEnabled(false);
                    }
                }
            });
            addNewButton.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    DefaultTableModel model = (DefaultTableModel) table.getModel();
                    model.addColumn("New Column " + i);
                    i++;
                }
            });
            JPanel btnPanel = new JPanel();
            btnPanel.add(hideButton);
            btnPanel.add(restoreButton);
            btnPanel.add(deleteButton);
            btnPanel.add(addButton);
            btnPanel.add(addNewButton);
            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() {
                @Override
                public void run() {
                    TableRowHeight frame = new TableRowHeight();
                }
            });
        }
    }
    

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