关于Java：从JTable获取DefaultTableModel

Get DefaultTableModel from JTable

我想从JTable获取DefaultTableModel，然后向其中添加Column。
我在JTable中搜索但只找到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。

相关讨论

再次，

您确定不能基于从myTable.getModel()

初始化的DefaultTableModel向JTable添加新的TableColumn
EDIT现在，我可以看到不强制转换(DefaultTableModel model = (DefaultTableModel) table.getModel();) JTable可以返回TableModel，而没有addColumn()

enter

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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();
}
});
}
}