I write this simple code to fill jTable1, but it just fills jTable1 with the last row from the database.
String SQL = "select * from usernames";
ResultSet rs = stmt.executeQuery(SQL);
String[] columnNames = {"Full Name", "Email"};
String n = "",e = "";
while(rs.next()) {
n = rs.getString("Full_Name");
e = rs.getString("Email");
Object[][]data = {{n,e}};
jTable1 = new JTable(data, columnNames);
}
I solved it by this code
String n = "",e = "";
DefaultTableModel model;
model = new DefaultTableModel();
jTable1 = new JTable(model);
model.addColumn("Full Name");
model.addColumn("Email");
while(rs.next())
{
n = rs.getString("Full_Name");
e= rs.getString("Email");
model.addRow(new Object[]{n,e});
}
Yes, it will always be the last row since in the while loop you are creating a new JTable instead of appending a row to the existing one. So do like this,
// Code
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
while(rs.next())
{
n = rs.getString("Full_Name");
e= rs.getString("Email");
//Object[][]data={{n,e}};
// This will add row from the DB as the last row in the JTable.
model.insertRow(jtable1.getRowCount(), new Object[] {n, e});
}
Related
public void populateJTable() {
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
Object[] rowData = new Object[4];
TrackService ts = new TrackService();
ArrayList<Track> tracks = ts.jsonToTracks();
for (int i = 0; i < tracks.size(); i++) {
rowData[0] = tracks.get(i).getTrackName();
rowData[1] = tracks.get(i).getArtist();
model.addRow(rowData);
}
jTable1 = new JTable(model);
}
In my json file I have stored metadata of an mp3 file which stores 5 values. My 'jsonToTracks' method stores them in an ArrayList.
I'm trying to get 2 of the values (trackName and artist) from inside my ArrayList and display them in my JTable.
My JTable has 4 columns - Name, Artist, Key, Mood. I'm trying to store the trackName and Artist in their corresponding columns. The Key and Mood column should be blank and the Name and Artist fields should be populated.
I can't see what I'm doing wrong, can anyone help?
Maybe you should try, moving your rowData initialization inside for loop.
public void populateJTable() {
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
TrackService ts = new TrackService();
ArrayList<Track> tracks = ts.jsonToTracks();
for (int i = 0; i < tracks.size(); i++) {
Object[] rowData = new Object[4];
rowData[0] = tracks.get(i).getTrackName();
rowData[1] = tracks.get(i).getArtist();
model.addRow(rowData);
}
jTable1 = new JTable(model);
}
jTable1 = new JTable(model);
I suspect the problem is that you are creating a new JTable but you never add the table to the frame.
Instead you should use:
jTable1.setModel( model );
This will replace the data in the existing JTable was I assume you have already added to a JScrollpane that has been added to the frame.
I have almost finished my project and I'm getting stuck with displaying the Data from my DB into a Jtable. I have searched and read and still can't get this to work. I'm not displaying any errors but when I run the code I get an error when I click on search for the data. I get
java.sql.SyntaxErrorException: Syntax error: Encountered "INVENTORY"
at line 1, column 9. Does that mean my code is fine and its a problem with my Database?
Here is my code.
private void cmdSEARCHINVActionPerformed(java.awt.event.ActionEvent evt) {
ResultSet rs = null;
try {
String host = "jdbc:derby://localhost:1527/The_Home_Place";
String uName = "Lynn";
String uPass = "Lynn";
Connection con = DriverManager.getConnection( host, uName, uPass );
Statement stmt = con.createStatement();
String Query = "SELECT *INVENTORY";
rs = stmt.executeQuery(Query);
ResultSetMetaData rsmt = rs.getMetaData();
int col = rsmt.getColumnCount();
Vector column = new Vector(col);
for(int i = 1; i <= col; i++)
{
column.add(rsmt.getColumnName(i));
}
Vector data = new Vector();
Vector row = new Vector();
while (rs.next());
{
row = new Vector(col);
for(int i = 1; i <= col; i++){
row.add(rs.getString(i));
}
data.add(row);
}
//Create the Table
JFrame frame = new JFrame();
frame.setSize(500,120);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
JTable table = new JTable(data,column);
JScrollPane jsp = new JScrollPane(table);
panel.setLayout(new BorderLayout());
panel.add(jsp,BorderLayout.CENTER);
frame.setContentPane(panel);
frame.setVisible(true);
}
catch (SQLException ex) {
JOptionPane.showMessageDialog(null, ex.toString());
}
}
Your SQL query has invalid syntax. Try changing it to
String query = "SELECT * FROM INVENTORY";
instead. Also, you shouldn't be using Vector anymore, because the class is obsolete; use an ArrayList<String> (a generic collection, not a raw one) for storing the row data instead.
I'm showing the method were the JTable is constructed, the error is when adding the rows inside the for (int i = 1; i <= numero_columnas; i++) loop, or the way the DefaultTableModel model = new DefaultTableModel(); is declared, I can't find the error.
public void verTablaTable (Connection db, String nombre) throws Exception{
Statement stmt=db.createStatement();
ResultSet sst_ResultSet = stmt.executeQuery("SELECT * FROM "+nombre);
ResultSetMetaData md = sst_ResultSet.getMetaData();
int numero_columnas = md.getColumnCount();
DefaultTableModel model = new DefaultTableModel();
for (int i=1;i<=numero_columnas; i++){
model.addColumn(md.getColumnName(i));
}
JTable tabla =new JTable(model);
DefaultTableModel model1 = (DefaultTableModel) tabla.getModel();
Vector row = new Vector();
row.setSize(numero_columnas);
while (sst_ResultSet.next()){
for (int i = 1; i <= numero_columnas; i++){
row.set(i-1,sst_ResultSet.getString(i));
}
model1.addRow(row);
}
tabla.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
JScrollPane sp_vertabla = new JScrollPane(tabla);
sp_vertabla.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
sp_vertabla.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
sp_vertabla.setBounds(50,30,700,500);
JPanel cont_vertabla = new JPanel(null);
cont_vertabla.setPreferredSize(new Dimension(750,600));
cont_vertabla.add(sp_vertabla);
f_vertabla.setContentPane(cont_vertabla);
f_vertabla.pack();
f_vertabla.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
//f_vertabla.setResizable(false);
f_vertabla.setVisible(true);
f_vertabla.addWindowListener(this);
}
this is the way the JTable looks
The row listed in the above pic, is the last one in the mysql table
Try adding the line
Vector row = new Vector();
inside the while loop.
Am trying to load the results of a database into a jtable, but when i run the code it only displays the first row and then errors an exception that no data was found. Here is my code;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};DBQ=" + "C:\\Users\\PMatope.FMBMW.000\\Documents\\Library.accdb";
conn = DriverManager.getConnection(url, "", "");
st = conn.createStatement();
ResultSet rs = st.executeQuery("SELECT ID,full_name,sex,course,contact,email FROM Person");
ResultSetMetaData data = rs.getMetaData();
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
// jTable1.setModel(model);
while (rs.next()) {
String id,fname,sex,course,contact,email;
id = rs.getString("ID");
fname = rs.getString("full_name");
sex = rs.getString("sex");
course = rs.getString("course");
contact = rs.getString("contact");
email = rs.getString("email");
model.addRow(new Object[] {id,fname,sex,course,contact,email});
model.fireTableDataChanged();
JOptionPane.showMessageDialog(null, rs.getString("sex"));
}
} catch (Exception e) {
JOptionPane.showMessageDialog(null,"Message: "+ e.getMessage());
}
Declare your table model first and create new instance for each loop times.
eg. :
DefaultTableModel model = null;
// jTable1.setModel(model);
while (rs.next()) {
model = (DefaultTableModel) jTable1.getModel();
String id,fname,sex,course,contact,email;
id = rs.getString("ID");
fname = rs.getString("full_name");
sex = rs.getString("sex");
course = rs.getString("course");
contact = rs.getString("contact");
email = rs.getString("email");
model.addRow(new Object[] {id,fname,sex,course,contact,email});
model.fireTableDataChanged();
JOptionPane.showMessageDialog(null, rs.getString("sex"));
}
You need to initialise,
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
inside your while loop
I want to display the data out of my result set into a JTable.
When I run the following code the table doesn't update.
public void getHouses(int price) {
Connection conn;
ArrayList<Integer> ID = new ArrayList<Integer>();
ArrayList<String> Price = new ArrayList<String>();
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
conn = DriverManager.getConnection("jdbc:odbc:Houses");
Statement statement = conn.createStatement();
ResultSet rec = statement.executeQuery("SELECT * FROM Houses WHERE Price <= " + price + "");
while (rec.next()) {
ID.add(rec.getInt("ID"));
Price.add(rec.getString("Price"));
}
String[] columnNames = {"House ID", "House Price"};
Object[][] rows = new Object[ID.size()][2];
for (int i = 0; i < ID.size(); i++) {
rows[i][0] = ID.get(i);
rows[i][1] = Price.get(i);
}
jTable1 = new JTable(rows, columnNames);
statement.close();
} catch (SQLException se) {
} catch (ClassNotFoundException cnf) {}
}
NOTE!
I added the JTable to the gui by drag and drop.
I also tested that my resultset has the data in it.
You need to learn about OP Swing MVC pattern, you need to declare a TableModel which your data store then set it to your table, like:
TableModel myData = new DefaultTableModel(columnVector, dataVector);
jTable1.setModel(myData);
Read more about DefaultTableModel