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How to properly delete row in JTable with double click?

Good afternoon guys, i'm trying to learn java programming and then i'm encountering some problem that i don't know why with my code when I'm learning about JTable.
So, what I'm trying to do is when i double clicked the row in JTable named TableGejala, the row that i double clicked will transfered into the other JTable named TableAturan and after that the row that i double clicked in TableGejala will be removed. For the part of transferring row from TableGejala to TableAturan successfully transferred when i double clicked the row, but it doesn't delete the correct row in TableGejala. Instead of deleting the row that i clicked, it delete the row below it.
For more details, this is my code to create TableGejala :
private void getTableGejala() {
while(tabel2.getRowCount() > 0){
for(int i=0;i < tabel2.getRowCount();i++){
tabel2.removeRow(i);
}
}
tabel2.addColumn("ID Gejala");
tabel2.addColumn("Nama Gejala");
TabelGejala.setModel(tabel2);
TabelGejala.setAutoResizeMode(TabelGejala.AUTO_RESIZE_ALL_COLUMNS);
}
And then this is my code to get data for my table from MySQL :
private void loadDataGejala(Boolean baru){
tabel2.getDataVector().removeAllElements();
try {
java.sql.Connection konek = (Connection) Koneksi.KoneksiDB.getConnection();
java.sql.Statement konek_statement = konek.createStatement();
String query_bukaTabel = "";
if(baru){
query_bukaTabel = "select id_gejala,nama_gejala from gejala";
}
else{
String idPkt = FieldID.getText();
query_bukaTabel = "select gejala.id_gejala,gejala.nama_gejala from gejala where gejala.id_gejala not in(select id_gejala from aturan2 where id_penyakit='"+idPkt+"')";
}
java.sql.ResultSet line_result = konek_statement.executeQuery(query_bukaTabel);
while (line_result.next()) {
Object[] getO = new Object[2];
getO[0] = line_result.getString("id_gejala");
getO[1] = line_result.getString("nama_gejala");
tabel2.addRow(getO);
}
line_result.close();
konek_statement.close();
}catch (Exception e) {}
}
This is my code to transfer the row and delete the row :
private void TabelGejalaMousePressed(java.awt.event.MouseEvent evt) {
if (evt.getClickCount()>=2){
int col = 0;
int row = 0;
row = TabelGejala.rowAtPoint(evt.getPoint());
col = TabelGejala.columnAtPoint(evt.getPoint());
String col1 = (String)TabelGejala.getValueAt(row, 0);
String col2 = (String)TabelGejala.getValueAt(row, 1);
DefaultTableModel model = (DefaultTableModel) TabelAturan.getModel();
DefaultTableModel old = (DefaultTableModel) TabelGejala.getModel();
old.removeRow(row);
model.addRow(new Object[]{col1, col2, 0});
TabelAturan.requestFocus();
TabelAturan.setRowSelectionInterval(TabelAturan.getRowCount()-1,TabelAturan.getRowCount()-1);
TabelAturan.editCellAt(TabelAturan.getRowCount()-1,2);
}
}
And this is the screenshot of my problem :
Before Double Clicked
After Double Clicked
Which part that makes my output get the wrong row to be deleted? please help me, and thank you in advance for any helps, even for reading my question :)

Firstly disable cell editable property in your first table(TabelGejala) to ensure proper deleting of row. I achieved this using the following code :-
//instance table model
DefaultTableModel tableModel = new DefaultTableModel(new Object[][]{},
new String[]{
"ID Gejala", "Nama Gejala"
}) {
#Override
public boolean isCellEditable(int row, int column) {
//all cells false
return false;
}
};
TabelGejala.setModel(tableModel);
then use jtable.getselectedrow() and jtable.getselectedcolumn() to get values from table. after addition of desired values to second table, simply delete the selected row. here is the code, derived from your code :-
private void TabelGejalaMousePressed(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
if (evt.getClickCount() >= 2) {
DefaultTableModel model = (DefaultTableModel) TabelAturan.getModel();
DefaultTableModel old = (DefaultTableModel) TabelGejala.getModel();
model.addRow(new Object[]{TabelGejala.getValueAt(TabelGejala.getSelectedRow(), 0), TabelGejala.getValueAt(TabelGejala.getSelectedRow(), 1), 0});
old.removeRow(TabelGejala.getSelectedRow());
TabelAturan.requestFocus();
TabelAturan.setRowSelectionInterval(TabelAturan.getRowCount() - 1, TabelAturan.getRowCount() - 1);
TabelAturan.editCellAt(TabelAturan.getRowCount() - 1, 2);
}
}

Change Boolean from a String to a checkbox (JTable)

I am having a small problem of showing results from my database to a JTable. It displays all of the data correctly, but at the moment it is showing "true" or "false" for boolean.
I know it must be because I am using getString, but does anyone know what to use in order to change it to a checkbox instead?
Current JTable:
My Database:
Code:
connection con=new connection();
Connection getcon=null;
Vector col = new Vector();
Vector dat= new Vector();
ResultSet rs = null;
try{
getcon = con.creatConnection();
col.add("Fanta");
col.add("Crisps");
col.add("Beer");
col.add("Wine");// create income table default colum names and sore it
col.add("Water");
col.add("Seat Row");
col.add("Seat");
col.add("Total Cost");
rs=getcon.createStatement().executeQuery("select*from orders"); //getting all the information from the table
dat.clear();
while(rs.next()){// if record source avilable
Vector v =new Vector();
v.add(rs.getString("Fanta").trim());
v.add(rs.getString("Crisps").trim());
v.add(rs.getString("Beer").trim());
v.add(rs.getString("Wine").trim());// getting income values from database and store in dat
v.add(rs.getString("Water").trim());
v.add(rs.getString("SeatRow").trim());
v.add(rs.getString("Seat").trim());
v.add(rs.getString("TotalCost").trim());
dat.add(v);
}
orderResults.setModel(new DefaultTableModel(dat, col));
}
catch(Exception ex){
JOptionPane.showMessageDialog(null, ex.getMessage());
}

First you have to save data as a Boolean in your model. So you should use this rs.getBoolean("Fanta") instead of rs.getString("Fanta").trim().
Second, you have to override a public Class getColumnClass(int column) method from your JTable. Your code could look like this:
JTable orderResults = new JTable() {
#Override
public Class getColumnClass(int column) {
// first 5 columns will be represented as an checkbox
if(column <= 4){
return Boolean.class;
}
// rest of them as a text
return String.class;
}
};

getting values from Database to JLabel

i have a table in the database of 4rows and 4columns. each column holds a different data.
now i want to retrieve all the data in the database and put them on JLabel on another form. i.e
in my Database i have.
packageName.....monthlyFee..... YearlyFee....... TotalFee
Regular......................150..................300....................450
Gold.........................300...................400..................700
..... ..... .... ....
now i have a form that i have put 4 empty JLabels in four rows but how do i retrieve the values from the database and place each value in the appropriate Label?.
This is what i've done but i still cant get around it. im stuck.
Thank you anyone.
public void getPrices()
{
String srt ="SELECT * FROM program_tbl";
try
{
con.connect();
ps = con.con.prepareStatement(srt);
rs = ps.executeQuery();
ResultSetMetaData data = rs.getMetaData();
int colums = data.getColumnCount();
while(rs.next())
{
Vector rows = new Vector();
for (int i = 1; i < colums; i++)
{
rows.addElement(rs.getObject(i));
}
.....................................................................

If you want to get this data as a string then you could probably try something like:
Vector<String> rows = new Vector<String>();
while(rs.next()) {
String rowEntry = rs.getString("packageName") +
rs.getString("monthlyFee") +
rs.getString("yearlyFee") +
rs.getString("totalFee") +
rows.add(rowEntry);
}
If not String, but an object to use later, then you can create a class:
public class MyObject {
private String packageName;
private int monthlyFee;
private int yearlyFee;
private int totalFee;
public MyObject (String name, int monthlyFee, int yearlyFee, int totalFee) {
this.packageName = name;
this.monthlyFee = monthlyFee;
this.yearlyFee = yearlyFee;
this.totalFee = totalFee;
}
/*Setters
*And
*Getters*/
}
And then use it as:
Vector<MyObject> rows = new Vector<MyObject>();
while (rs.next()) {
MyObject obj = new MyObject(rs.getString("packageName")
, rs.getInt("montlyFee")
, rs.getInt("yearlyFee")
, rs.getInt("totalFee")
);
rows.add(obj)
}
So say we now have a vector with String values - Vector<String> rows;
now i would like to create those JLabels.
JLabel[] myLabels = new JLabel[v.size()];
for(int i=0; i<rows.size(); i++) {
as[i] = new JLabel(rows.get(i));
}
And now we have an array of JLabels ready to be put to applet.

Don't use a JLabel. There is no way you can easily format the data so that you get tabular data.
Instead you should be using a JTable. Read the section from the Swing tutorial on How to Use Tables for more information. You can also search the forum for examples of using a JTable with a ResultSet.

adding rows with data from a Mysql table to jtable

Adding the colums works, but i am stuck when i want to add the data of the columns stored in a mysql database to the jtable. it ask for a object vector[][] but i have no clue what to give
Connection con;
DefaultTableModel model = new DefaultTableModel();
public Hoofdscherm() {
initComponents();
uitvoerSpelers.setModel(model);
try {
con = DriverManager.getConnection("jdbc:mysql://localhost/fullhouse", "root", "hamchi50985");
// selecteer gegevens uit fullhouse.speler tabel
PreparedStatement stat = con.prepareStatement("SELECT * FROM fullhouse.speler");
// sla deze GEGEVENS op in een resultset
ResultSet resultaat = stat.executeQuery();
// haal alle kolomnamen op PUUR VOOR DE MODEL VAN JTABLE
ResultSetMetaData data = resultaat.getMetaData();
String[] colum = new String[15];
for (int i = 1; i < data.getColumnCount(); i++) {
colum[i] = data.getColumnName(i);
model.addColumn(colum[i]);
while (resultaat.next()) {
Object[] gegevens = new String[] {resultaat.getString(1)};
model.addRow(gegevens[0]);
}
}
} catch (SQLException ex) {
JOptionPane.showMessageDialog(null, ex);
}
}

I think you need something like this.
Note
1. Also add your columns separate to resultset data. Like I showed in my code below.
Vector<String> rowOne = new Vector<String>();
rowOne.addElement("R1C1");
rowOne.addElement("R1C2");
Vector<String> rowTwo = new Vector<String>();
rowTwo.addElement("R2C1");
rowTwo.addElement("R2C2");
Vector<String> cols = new Vector<String>();
Vector<Vector> vecRow = new Vector<Vector>();
vecRow.addElement(rowOne);
vecRow.addElement(rowTwo);
cols.addElement("Col1");
cols.addElement("Col2");
JTable table = new JTable(vecRow, cols);
Edit
For you convenience and requirement You can follow code structure below.
Vector<String> rows = new Vector<String>();
Vector<Vector> dBdata = new Vector<Vector>();
// Add Columns to table
for (int i = 1; i < data.getColumnCount(); i++) {
colum[i] = data.getColumnName(i);
model.addColumn(colum[i]);
}
while (resultaat.next()) {
// add column data to rows vector
// Make sure that all data type is in string because of generics
rows.add(resultaat.getString("columnName1"));
rows.add(resultaat.getString("columnName2"));
rows.add(resultaat.getString("columnName3"));
// add whole row vector to dBdata vector
dBdata.addElement(rows);
}
model.addRow(dBdata);
Vector implements a dynamic array. It is similar to ArrayList, but with two differences:
Vector is synchronized.
Vector contains many legacy methods that are not part of the collections framework.
Class Vector Javadoc
I hope this will help you.

The line model.addRow(gegevens[0]);is incorrect.
You should do something like this:
String[] colum = new String[15];
for (int i = 1; i < data.getColumnCount(); i++) {
colum[i] = data.getColumnName(i);
model.addColumn(colum[i]);
while (resultaat.next()) {
Object[] gegevens = new String[] {resultaat.getString(1)};
model.addRow(gegevens);
}
}
Also you need to check DefaultTableModel
According to the documentation of DefaultTableModel:
This is an implementation of TableModel that uses a Vector of Vectors
to store the cell value objects.

JTable Swing retrieve data

I'm trying to populate a table with data from a database however i am having some issues with it. Could someone provide me with an example? (so the table takes in an Object[][] parameter for the data). I have the following basic code to display a table ;
class table extends JFrame
{
JTable table;
public table()
{
setLayout(new FlowLayout());
String[] columnNames = {"test","test","test"};
Object[][] data= {{"test","test","test"},{"test","test","test"}};
table = new JTable(data,columnNames);
table.setPreferredScrollableViewportSize(new Dimension(500,100));
table.setFillsViewportHeight(true);
JScrollPane scrollPane = new JScrollPane(table);
add(scrollPane);
}
}

Two years ago, during my time in technical school, I wrote a little library help solve some of the problems proposed by the exercises, which included a a DatabaseTableModel.
The class extends from AbstractTableModel, which means you can set it as the your JTable's data source.
Here's the algorithm that constructs a model from a ResultSet:
public final void constructModel(ResultSet rs) throws SQLException {
ResultSetMetaData rsmd = rs.getMetaData();
rs.last();
rowCount = rs.getRow();
int columnCount = rsmd.getColumnCount();
// DatabaseColumn simply holds a name and a Class<?>.
columns = new DatabaseColumn[columnCount];
// This is the Object[][] array that you were talking about.
// It holds all the data from the ResultSet.
data = new Object[columnCount][rowCount];
for (int i = 0; i < columnCount; ++i) {
// Figure out the column name and type.
int j = i + 1;
String colName = rsmd.getColumnLabel(j);
Class<?> colClass = String.class;
try {
colClass = Class.forName(rsmd.getColumnClassName(j));
} catch (ClassNotFoundException ex) {
colClass = String.class;
}
columns[i] = new DatabaseColumn(colName, colClass);
// Get the data in the current column as an Object.
rs.beforeFirst();
for (int k = 0; rs.next(); ++k) {
data[i][k] = rs.getObject(j);
}
}
// Notify listeners about the changes so they can update themselves.
fireTableStructureChanged();
}
The class worked when I used it in school, but it isn't exactly production code. When I look at it today, I start to see problems.
One problem is that it is loading the entire contents of the ResultSet into memory. Could get ugly pretty quickly.
Also, the algorithm isn't exactly optimal. It loops around with the database cursor as if it was nothing; I suppose that it would be less costly for the database if it had retrieved all the objects in the current row first and assigned them to their appropriate columns before moving on to the next row.
Nevertheless, I think it is a good enough starting point.