Jtable更新选中的行 [英] Jtable update selected row
问题描述
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,并且我必须刷新表以更改该表排!
I have a jtable that has a edit button, when i select a row and clicked to edit button and edit fields, and click to save button, that row doesn't update, And i have to refresh my table to Change that row!
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:
My NewUserFrame_Edit Class :
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:
My setValueAt() and updateFile() methods of my model Class:
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编辑"按钮时,将打开一个新的jframe,其文本字段中填充了较旧的数据,并且我更新了数据并单击保存"按钮. 因此,我的专栏不确定. 我选择整行,而不是单元格!
When i select a row and click to edit button, a new jframe is open that its text field is fill with older data, and i update data and click to save button. Thus, my column is not certain. I select a entire row, Not a cell!
谢谢.
推荐答案
您可以在AbstractModel
扩展类中创建一个名为updateRow(int index,String[] values)
的方法,并在其中使用setValueAt(newValue,行,索引).并在TableModel
的覆盖的setValue
方法中写入fireTableCellUpdated(row,col).
You can create a method called updateRow(int index,String[] values)
within your AbstractModel
extending class and within it set new Value for each cell for that row using setValueAt(newValue,row,index). And within overridden setValue
method of TableModel
write fireTableCellUpdated(row, col).
请考虑以下给出的代码.查看MyModel
类中的updateRow
和setValueAt
方法.并观看用MyMouseAdapter
类编写的((MyModel)myModel).updateRow(row,values);//update row
.
Consider the Code Given below. Look at the updateRow
and setValueAt
method in MyModel
class. And watch ((MyModel)myModel).updateRow(row,values);//update row
written in MyMouseAdapter
class.
import javax.swing.*;
import javax.swing.border.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.table.*;
class TableRowEdit extends JFrame
{
private JTable table;
private JScrollPane jsPane;
private TableModel myModel;
private JPanel dialogPanel;
private JTextField tf[];
private JLabel lbl[];
public void prepareAndShowGUI()
{
myModel = new MyModel();
table = new JTable(myModel);
jsPane = new JScrollPane(table);
table.getColumnModel().getColumn(2).setCellRenderer(new LabelCellRenderer());
table.addMouseListener(new MyMouseAdapter());
getContentPane().add(jsPane);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
prepareDialogPanel();
pack();
setVisible(true);
}
private void prepareDialogPanel()
{
dialogPanel = new JPanel();
int col = table.getColumnCount() - 1;
dialogPanel.setLayout(new GridLayout(col,2));
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 class LabelCellRenderer extends DefaultTableCellRenderer
{
public Component getTableCellRendererComponent(JTable table,Object oValue, boolean isSelected, boolean hasFocus, int row, int column)
{
Component c = super.getTableCellRendererComponent(table, oValue,isSelected, hasFocus,row, column);
String value = (String)oValue;
JLabel label =(JLabel)c;
label.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED));
label.setBackground(Color.lightGray);
label.setHorizontalTextPosition(SwingUtilities.CENTER);
label.setHorizontalAlignment(SwingUtilities.CENTER);
label.setText(value);
return label;
}
}
private class MyMouseAdapter extends MouseAdapter
{
@Override
public void mousePressed(MouseEvent evt)
{
int x = evt.getX();
int y = evt.getY();
int row = table.rowAtPoint(new Point(x,y));
int col = table.columnAtPoint(new Point(x,y));
if (col == 2)
{
String arr[] = new String[table.getColumnCount() - 1];
for (int i = 0 ; i < arr.length ; i++)
{
arr[i] = (String)table.getValueAt(row,i);
}
populateTextField(arr);
JOptionPane.showMessageDialog(TableRowEdit.this,dialogPanel,"Information",JOptionPane.INFORMATION_MESSAGE);
String[] values = new String[tf.length];
for (int i = 0 ; i < tf.length ; i++)
{
values[i] = tf[i].getText();
}
((MyModel)myModel).updateRow(row,values);//update row
}
}
}
private class MyModel extends AbstractTableModel
{
String[] columns = {
"Roll No.",
"Name",
"Action"
};
String[][] inData = {
{"1","Anthony Hopkins","Edit"},
{"2","James William","Edit"},
{"3","Mc. Donald","Edit"}
};
@Override
public void setValueAt(Object value, int row, int col)
{
inData[row][col] = (String)value;
fireTableCellUpdated(row,col);
}
@Override
public Object getValueAt(int row, int col)
{
return inData[row][col];
}
@Override
public int getColumnCount()
{
return columns.length;
}
@Override
public int getRowCount()
{
return inData.length;
}
@Override
public String getColumnName(int col)
{
return columns[col];
}
@Override
public boolean isCellEditable(int row ,int col)
{
return true;
}
//This method updates the Row of table
public void updateRow(int index,String[] values)
{
for (int i = 0 ; i < values.length ; i++)
{
setValueAt(values[i],index,i);
}
}
}
public static void main(String st[])
{
SwingUtilities.invokeLater( new Runnable()
{
@Override
public void run()
{
TableRowEdit td = new TableRowEdit();
td.prepareAndShowGUI();
}
});
}
}
更新
原始代码一切都很好.保持最初的代码.唯一的问题是方法updateButtonActionPerformed
中的行userModel = new AllUser();
.它正在创建AllUser
的新对象,而不是使用当前对象.因此,您应该从updateButtonActionPerformed
中删除此行.并按如下所示更改NewUserFrame_Edit
构造函数:
UPDATE
Everything was fine with your original code. Keep the code as it was initially. The only problem was line userModel = new AllUser();
in method updateButtonActionPerformed
. It was creating new object of AllUser
instead of using the current one. So you should remove this line from updateButtonActionPerformed
. and change the NewUserFrame_Edit
constructor as follows:
public NewUserFrame_Edit(AllUser userModel/*Add this parameter*/,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);
}
将您的身份更改为updateButtonActionPerformed
:
private void updateButtonActionPerformed(java.awt.event.ActionEvent evt) {
//userModel = new AllUser();//Comment it.
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();
}
并更改类UserPage
的editUser(int row)
方法,如下所示:
And changeeditUser(int row)
method of class UserPage
as follows:
public void editUser(int row)
{
UserInformation userInf = userModel.getSelectedMember(row);
NewUserFrame_Edit edit = new NewUserFrame_Edit(userModel,userInf, row);
}
这是您的updateFile
方法:
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) {
}
}
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