java - Jtable更新选中行

Question

我有一个带有编辑按钮的 jtable，当我选择一行并单击以编辑按钮和编辑字段，然后单击以保存按钮时，该行不会更新，我必须刷新我的表以更改它行!

我的代码:

        if (e.getSource() == editButton) {
        selectedRow = uTable.getSelectedRow();
        if (selectedRow >= 0) {
            editUser(selectedRow);
        } else {
            JOptionPane.showMessageDialog(null, "Select a row");
        }
    }

    public void editUser(int row) {
    UserInformation userInf = userModel.getSelectedMember(row);
    NewUserFrame_Edit edit = new NewUserFrame_Edit(userInf, row);
}

...

我的 NewUserFrame_Edit 类:

public class NewUserFrame_Edit extends javax.swing.JFrame {

private AllUser userModel;
private int selectedrow;
private String gender;

public NewUserFrame_Edit(AllUser userModel,UserInformation userinf, int row) {
...
this.userModel = userModel;
    jTextField1.setText(userinf.getFname().toString().trim());
    jTextField2.setText(userinf.getLname().toString().trim());

    if (userinf.getGender().equals("Male")) {
        jRadioButton1.setSelected(true);
    } else {
        jRadioButton2.setSelected(true);
    }

    jTextField3.setText(userinf.getDate());
    selectedrow = row;
    setVisible(true);
}

private void updateButtonActionPerformed(java.awt.event.ActionEvent evt) {     
    userinf = new UserInformation();

    userinf.setFname(jTextField1.getText());
    userinf.setLname(jTextField2.getText());
    userinf.setGender(gender);
    userinf.setDate(jTextField3.getText());

    userModel.setValueAt(userinf.getFname() , selectedrow, 1);
    userModel.setValueAt(userinf.getLname() , selectedrow, 2);
    userModel.setValueAt(userinf.getGender(), selectedrow , 3);
    userModel.setValueAt(userinf.getDate() , selectedrow, 4);
    userModel.updateFile(userModel.Udata);

    NewUserFrame_Edit.this.dispose();
}
...
}

我的模型类的 setValueAt() 和 updateFile() 方法:

public class AllUser extends AbstractTableModel {
...
    @Override
public void setValueAt(Object value, int rowIndex, int columnIndex) {
    UserInformation userInfo = Udata.get(rowIndex);
    switch (columnIndex) {
        case 0:
            userInfo.setID((String) value);
            break;
        case 1:
            userInfo.setFname((String) value);
            break;
        case 2:
            userInfo.setLname((String) value);
            break;
        case 3:
            userInfo.setGender((String) value);
            break;
        case 4:
            userInfo.setDate((String) value);
            break;
    }
    fireTableCellUpdated(rowIndex, columnIndex);
}

    public void updateFile(ArrayList<UserInformation> data) {
    PrintWriter pw;
    try {
        pw = new PrintWriter(new FileWriter("AllUserRecords.txt"));
        for (UserInformation userinf : data) {
            String line = userinf.getID()
                    + "     " + userinf.getFname()
                    + "     " + userinf.getLname()
                    + "     " + userinf.getGender()
                    + "     " + userinf.getDate();

            pw.println(line);
        }
        pw.close();
    } catch (IOException ioe) {
    }
}
...
}

当我选择一行并单击以编辑按钮时，一个新的 jframe 打开，其文本字段填充了旧数据，我更新数据并单击以保存按钮。因此，我的专栏不确定。我选择了整行，而不是单元格!

谢谢。

Answer 1

要更改 JTable 条目，请使用 TableModel#setValueAt .调用 fireTableDataChanged 是不必要的。这是供 TableModel 本身内部使用。

if (selectedRow >= 0) {
    ...
    userModel.setValueAt(newValue, selectedRow, 0);
     //        ...   more values for columns    1, 2, 3, etc.
} ...