当用户双击行时，我需要使用新值编辑表格。我尝试使用 setValuesAt 方法，但它没有执行任何操作。
这是我到目前为止所得到的，但我不知道如何为 Jtable 设置新值。
public class Table extends JFrame {
private JTable table;
private JScrollPane jsPane;
private DefaultTableModel model;
private JPanel dialogPanel;
private JTextField tf[];
private JLabel lbl[];
private JPanel panel;
Object[] columns = new Object[]{"Name", "Last Name", "ID", "Email"};
Object[][] inData ;
public void prepareAndShowGUI() {
setTitle("Overview");
model = new DefaultTableModel() {
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
};
model.setColumnIdentifiers(columns);
table = new JTable(model);
for (int i = 1; i <= 10; i++) {
model.addRow(new Object[]{"a", "s", "w", "e"});
}
jsPane = new JScrollPane(table);
table.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() == 2) {
int x = e.getX();
int y = e.getY();
int row = table.rowAtPoint(new Point(x, y));
int col = table.columnAtPoint(new Point(x, y));
String array[] = new String[table.getColumnCount()];
for (int i = 0; i < array.length; i++) {
array[i] = (String) table.getValueAt(row, i);
}
populateTextField(array);
JOptionPane.showMessageDialog(null, dialogPanel, "Information", JOptionPane.INFORMATION_MESSAGE);
String[] values = new String[tf.length];
for (int i = 0; i < tf.length; i++) {
values[i] = tf[i].getText();
}
model.setValueAt(values, row, row);
}
}
});
panel = new JPanel(new BorderLayout());
JPanel panel1 = new JPanel();
panel1.setLayout(new BoxLayout(panel1, BoxLayout.X_AXIS));
panel.add(panel1, BorderLayout.NORTH);
panel.add(jsPane, BorderLayout.CENTER);
getContentPane().add(panel);
pack();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
prepareDialogPanel();
setVisible(true);
}
private void prepareDialogPanel() {
dialogPanel = new JPanel();
int col = table.getColumnCount();
dialogPanel.setLayout(new GridLayout(col, 1));
tf = new JTextField[col];
lbl = new JLabel[col];
for (int i = 0; i < col; i++) {
lbl[i] = new JLabel(table.getColumnName(i));
tf[i] = new JTextField(10);
dialogPanel.add(lbl[i]);
dialogPanel.add(tf[i]);
}
}
private void populateTextField(String[] s) {
for (int i = 0; i < s.length; i++) {
tf[i].setText(s[i]);
}
}
}
public static void main(String st[])
{
SwingUtilities.invokeLater( new Runnable()
{
@Override
public void run()
{
Table td = new Table();
td.prepareAndShowGUI();
}
});
}
最佳答案
对于初学者，您应该使模型可编辑，因此更改此行:
model = new DefaultTableModel() {
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
};
致:
model = new DefaultTableModel() {
@Override
public boolean isCellEditable(int row, int column) {
return true; //use the row and col to determine which
//cells are editable. If you want all, have this return true.
}
};
这将调用 JTable 的 DefaultCellEditor，当用户对编辑进行更改时，它将调用模型的 setValueAt 方法。
所有这些组件都可以替换为自定义组件以执行不同的操作。
以下是有关 JTables 的 Oracle 官方文档:
https://docs.oracle.com/javase/tutorial/uiswing/components/table.html
如果您尝试让对话框正常工作，问题出在以下几行:
String[] values = new String[tf.length];
for (int i = 0; i < tf.length; i++) {
values[i] = tf[i].getText();
}
model.setValueAt(values, row, row);
基本上，setValueAt 只能在逐个单元格的基础上工作。您不能像这样更新整行。相反，请尝试:
for(int i=0;i<tf.length;i++)
{
model.setValueAt(tf[i].getText(), row, i);
}
关于java - 双击编辑 Jtable，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30313290/