I have a jtable that show a text file contain on own. Each line in text file is a user record. I add a edit button to edit each selected row on table. I use this code, But i don't understand how to do this:
public class AllUser extends AbstractTableModel {
UserInformation uiS = new UserInformation();
String[] col = {"ID", "Fname", "Lname", "Gender", "Date"};
List<UserInformation> Udata = new ArrayList<UserInformation>();
public AllUser() {
BufferedReader br = null;
try {
FileReader fr = new FileReader("xxx.txt");
br = new BufferedReader(fr);
String line;
while ((line = br.readLine()) != null) {
if (line.trim().length() == 0) {
continue;
}
Udata.add(initializeUserInfos(line));
}
} catch (IOException e) {
} finally {
if (br != null) {
try {
br.close();
} catch (IOException ioe) {
}
}
}
}
private UserInformation initializeUserInfos(String str) {
UserInformation Uinit = new UserInformation();
String[] CellArray = str.split(" ");
Uinit.setID(CellArray[0]);
Uinit.setFname(CellArray[1]);
Uinit.setLname(CellArray[2]);
Uinit.setGender(CellArray[3]);
Uinit.setDate(CellArray[4]);
return Uinit;
}
@Override
public String getColumnName(int colu) {
return col[colu];
}
@Override
public int getRowCount() {
return Udata.size();
}
@Override
public int getColumnCount() {
return col.length;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
UserInformation uinfoS = Udata.get(rowIndex);
Object value = null;
switch (columnIndex) {
case 0:
value = uinfoS.getID();
break;
case 1:
value = uinfoS.getFname();
break;
case 2:
value = uinfoS.getLname();
break;
case 3:
value = uinfoS.getGender();
break;
case 4:
value = uinfoS.getDate();
break;
default:
value = "...";
}
return value;
}
@Override
public void setValueAt(Object value, int rowIndex, int columnIndex) {
UserInformation userInfo = new UserInformation();
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;
}
}
public Object getSelectedMember(int row){
UserInformation userInf=new UserInformation();
Object fname=userInf.getFname();
Object lname=userInf.getLname();
Object gender=userInf.getGender();
Object date=userInf.getDate();
return // ?
}
}
I add This getSelectedMember(int row) method to do this, But incorrect!
public class UserPage extends JFrame implements ActionListener {
private AllUser userModel;
private JTable uTable;
private JButton editButton;
public UserPage() {
userModel = new AllUser();
uTable = new JTable(userModel);
add(new JScrollPane(uTable), BorderLayout.CENTER);
add(buttonPanels(), BorderLayout.PAGE_START);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(800, 600);
}
public final JPanel buttonPanels() {
JPanel buttonsPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
editButton=new JButton("Edit");
editButton.addActionListener(this);
buttonsPanel.add(editButton);
return buttonsPanel;
}
@Override
public void actionPerformed(ActionEvent e) {
if(e.getSource()== editButton){
int selectedRow=uTable.getSelectedRow();
if(selectedRow>0){
editUser(selectedRow);
}
else{
JOptionPane.showMessageDialog(null, "Select a user");
}
}
}
public void editUser(int row){
userModel.getSelectedMember(row);
new NewUserFrame_Edit().setVisible(true);
}
}
UserInformation Class:
public class UserInformation {
private String Fname;
private String Lname;
private String ID;
private String Gender;
private String Date;
public String getFname() {
return Fname;
}
public void setFname(String fname) {
this.Fname = fname;
}
public String getLname() {
return Lname;
}
public void setLname(String lname) {
this.Lname = lname;
}
public String getID() {
return ID;
}
public void setID(String i_d) {
this.ID = i_d;
}
public String getGender() {
return Gender;
}
public void setGender(String gndr) {
this.Gender = gndr;
}
public String getDate() {
return Date;
}
public void setDate(String date) {
this.Date = date;
}
@Override
public String toString() {
return ID + " " + Fname + " "
+ Lname + " " + Gender + " " + Date + "\n";
}
}
Sorry for long code.
Create an extra column in table and fill the cell value with Edit. Then render the Edit cell with appropriate TableCellRenderer . Add MouseListener to table. Get the row and column number of the cell clicked on table. If the cell clicked contains value Edit , retrieve value at each column of that row and display it in a Panel containing JTextFields . Show that Panel using JOptionpane or in a JDialog. Here is the brief code demo for achieving this task:
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.Component;
import java.awt.Color;
import java.awt.Point;
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseAdapter;
import java.awt.Cursor;
import javax.swing.BorderFactory;
import javax.swing.border.BevelBorder;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JScrollPane;
import javax.swing.JOptionPane;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
import javax.swing.event.TableModelListener;
import javax.swing.event.TableModelEvent;
import javax.swing.table.TableModel;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.DefaultTableCellRenderer;
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);
//Write here the code to save changed values to file and update to JTable also.
}
}
}
private class MyModel extends AbstractTableModel
{
String[] columns = {
"Roll No.",
"Name",
"Action"
};
String[][] inData = {
{"1","Huge Jackman","Edit"},
{"2","Thomas Andrews","Edit"},
{"3","Shiney","Edit"}
};
@Override
public void setValueAt(Object value, int row, int col)
{
inData[row][col] = (String)value;
}
@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];
}
}
public static void main(String st[])
{
SwingUtilities.invokeLater( new Runnable()
{
@Override
public void run()
{
TableRowEdit td = new TableRowEdit();
td.prepareAndShowGUI();
}
});
}
}