I have to display authors on a table and I made only 1 column for it. I have used a jtable before but with 2d arrays and multiple columns. I'm having problems with this one.The 'authors name' are stored in mysql.
tblAuthor.setModel(new javax.swing.table.DefaultTableModel(
authorData,new String[]{"Name"}){
#Override
public boolean isCellEditable(int row, int column) {
//all cells false
return false;
}
#Override
public Class getColumnClass(int columnIndex) {
return String.class;
}
})
}
this one is how i retrieve the authors
private Object[][] getAuthors(int id) throws SQLException{
sql="SELECT authorName FROM tbl_textbook as b,tbl_txauthor as a where a.bookID=b.bookID AND a.bookID="+id;
rs=stm.executeQuery(sql);
rs.next();
Object authors[][] = new String[countAuthors(id)][1];
if(rs.getRow()!=0)
authors=new String[rs.getInt(1)][1];
i=0;
while(rs.next()){
authors[i][1]=rs.getString(1);
i++;
}
return authors;
}
I'm a noob so please help.thank you
try
authors[i][0]=rs.getString(1);
java array are 0 based unlike resultset that are 1 based
Related
I've added a checkbox to rows on my table, but unfortunately I'm unable to select/deselect them.
I'm using an own Table Model that I got on internet.
Table Model's code:
import java.util.ArrayList;
import javax.swing.table.AbstractTableModel;
/**************/
public class ModeloTabela extends AbstractTableModel {
private ArrayList linhas = null;
private String [] colunas = null;
public ModeloTabela(ArrayList lin, String[] col){
setLinhas(lin);
setColunas(col);
}
public ArrayList getLinhas(){
return linhas;
}
public void setLinhas(ArrayList dados){
linhas = dados;
}
public String[] getColunas(){
return colunas;
}
public void setColunas(String [] nomes){
colunas = nomes;
}
public int getColumnCount(){
return colunas.length;
}
public int getRowCount(){
return linhas.size();
}
public String getColumnCount (int numCol){
return colunas[numCol];
}
public Object getValueAt(int numLin, int numCol){
Object[] linha = (Object[])getLinhas().get(numLin);
return linha[numCol];
}
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
public boolean isCellEditable(int row, int col) {
return true;
}
}
And this Method will fill the Table:
public void PreencheTabela(String sql, JTable jt1, JTextField j1){
c.conexao();
ArrayList dados = new ArrayList();
String [] Colunas = new String[] {"STATUS", "ID", "FABRICANTE", "FORNECEDOR", "NOME", "CATEGORIA", "DATA DO CADASTRO", " CODIGO DE BARRAS", "QUANTIDADE"};
c.executaSQL(sql);
try {
c.rs.first();
do{
dados.add(new Object[]{c.rs.getInt("prod_id"),c.rs.getString("prod_fabricante"),c.rs.getString("prod_fornecedor"),c.rs.getString("prod_nome"),
c.rs.getString("prod_categoria"),c.rs.getDate("prod_datacadastro"),c.rs.getString("prod_codbarras"), c.rs.getInt("est_quantidade")});
j1.setBorder(BorderFactory.createLineBorder(Color.black));
}while(c.rs.next());
} catch (SQLException ex) {
JOptionPane.showMessageDialog(null, "Erro!\n"+ex.getMessage());
}
ModeloTabela modelo = new ModeloTabela(dados, Colunas);
jt1.setModel(modelo);
}
Which code can I use? Also, where do I put this code??
but unfortunately I'm unable to select/deselect them.
You didn't implement the setValueAt(...) method in your TableModel so the value can never be updated in the model.
I'm using an own Table Model that I got on internet.
Why are you using a custom TableModel? You can use the DefaultTableModel. It implements the setValueAt(...) method correctly. It also has an addRow(..) method that allows you to dynamically update the model.
Are you actually storing Boolean objects in the TableModel? I don't see you using getBoolean() to get the data from your ResultSet. The default renderers/editors for a check box will only be used when you have Boolean data in the column.
Also take a look at: Can't create column with checkboxes in JTable for a better implementation of the getColumnClass() method.
If you insist on using your custom TableModel, then take a look at the Swing tutorial link you were given in your last question. It shows and example of implementing the setValueAt() method.
im developing an application and i'm trying to insert a new row into jtable
i've followed this tutorial , the user can add/remove product information(row) through a form.the database & the table should be updated ,the remove function works well but i can't insert new row into the table .
Note:- when i close the app & run it again the table is updated
and here's my code
public class TableModel extends AbstractTableModel {
Object[] values;
String[] columnNames;
private ArrayList productInfoList;
public TableModel() {
super();
Session session = HibernateUtil.openSession();
Query q = session.createQuery("from Product");
productInfoList = new ArrayList(q.list());
session.close();
}
#Override
public int getRowCount() {
//return dataVec.size();
return productInfoList.size();
}
#Override
public int getColumnCount() {
return 9;
}
#Override
public Object getValueAt(int rowIndex, int columnIndex) {
Product product = (Product) productInfoList.get(rowIndex);
values = new Object[]{product.getProdectId(),
product.getProductName(), product.getProductBuyingPrice(),
product.getProductSalesPrice(), product.getCategory(), product.getBrand(),
product.getProductQuantity(), product.getProductMinQuantity(), product.getProductDescription()};
return values[columnIndex];
}
#Override
public String getColumnName(int column)
{
columnNames=new String[]{"id","Product Name","Buy price","Sale price ","Category",
"Brand","Quantatity","Min Quantatity","Description"};
return columnNames[column];
}
public void removeRow(int rowIndex) {
productInfoList.remove(rowIndex);
fireTableRowsDeleted(rowIndex, rowIndex);
}
public void insertRow(int rowIndex,Product everyRow) {
productInfoList.add(rowIndex, everyRow);
fireTableRowsInserted(rowIndex, rowIndex);
}
}
this is the code that i try to insert row with
public void AddRow() {
int position = jTable1.getRowCount() - 1;
System.out.println(position); // test
Product product = new Product();
tablemodel.insertRow(position, product);
}
Please help me as i'm get tired of it :|
Your TableModel is storing a Product object in an ArrayList.
So, when you want to add a new row to the model you need to create a new Product object and add the Product to the ArrayList.
Also, you don't need to invoke table.repaint(), the insertRow(...) method is invoking the fireTableRowsInserted(...) method which will tell the table to repaint the row.
I have a sample code that we use to dynamic row numbers in Java Swing Table i.e JTable. I new to JavaFX and would like to the same in JavaFX. Is there is any way to set automatic row numbers in JavaFX Table
class LineNumberTable extends JTable {
private JTable mainTable;
public LineNumberTable(JTable table) {
super();
mainTable = table;
setAutoCreateColumnsFromModel(false);
setModel(mainTable.getModel());
setAutoscrolls(false);
addColumn(new TableColumn());
getColumnModel().getColumn(0).setCellRenderer(mainTable.getTableHeader().getDefaultRenderer());
getColumnModel().getColumn(0).setPreferredWidth(40);
setPreferredScrollableViewportSize(getPreferredSize());
}
#Override
public boolean isCellEditable(int row, int col) {
if (col == uneditableColumn) {
return false;
}
return bEdit;
}
#Override
public Object getValueAt(int row, int column) {
return Integer.valueOf(row + 1);
}
#Override
public int getRowHeight(int row) {
return mainTable.getRowHeight();
}
}
In JavaFX, you use TableColumns with CellFactories and CellValueFactories to populate your TableView.
The JavaFX tutorials have an article that might get you started.
In one approach I have used I convert the business objects to display into presentation objects and add all necessary properties (like in your case, the number) to them.
EDIT: In a second, cleaner approach, you could set your CellFactory to create a TableCell that shows its own index property in TableCell#updateItem(S, boolean):
public class NumberedCell extends TableCell{
protected void updateItem(Object object, boolean selected){
setText(String.valueOf(getIndex());
}
}
i've created a swing jtable with some data from a database. in web apps, usually i display the data to the user and set it's unique database id in as an html tag attribute, so that when the user clicks on say edit, i pick the element's hidden db unique id from the html tag attribute using javascript. That way, i know which data user wants to edit and i can update it in the database using it's unique primary key.
Now how do i do this in a desktop app writen in java using swing.
Put it more clearly, am looking for an equivalent of;
<table>
<tr id=1 ><td>david</td></tr>
<tr id=2 ><td>peter</td></tr>
<tr id=3 ><td>Timothy</td></tr>
</table>
Hope am clear. Thanks
Your TableModel which backs up the JTable can contain anything you like. It can for example contain objects like
class User{
public final int ID;
public String name;
public int age;
}
and you can then choose to only include certain values in your JTable
class MyTableModel implements TableModel{
private List<User> users;
#Override
public Object getValueAt(int row, int column){
if ( column == 0 ){
return users.get( row ).name;
}
}
}
But since your TableModel still contains the full User objects, you have all the required information.
Note: the above code will not compile due to missing methods, ... . It is just here to illustrate what I mean
The equivalent is an AbstractTableModel subclass instance backed by a List<YourObject>. When you edit a row, you get the index of the selected row from the table (JTable.getSelectedRow()), then you convert this row index to a model row index (JTable. convertRowIndexToModel()), then you ask your model for the YourObject at this row, and you get the ID of YourObject directly from the object.
Read the JTable tutorial for more details.
public class UserTableModel extends AbstractTableModel {
private List<User> users;
public UserTableModel(List<User> users) {
this.users = new ArrayList<User>(users);
}
#Override
public int getRowCount() {
return users.size();
}
#Override
public int getColumnCount() {
return 1;
}
#Override
public Object getValueAt(int rowIndex, int columnIndex) {
if (columnIndex == 0) {
return users.get(rowIndex).getName();
}
else {
throw new IllegalArgumentException();
}
}
#Override
public Class<?> getColumnClass(int columnIndex) {
if (columnIndex == 0) {
return String.class;
}
else {
throw new IllegalArgumentException();
}
}
public User getUserAtRow(int rowIndex) {
return users.get(rowIndex);
}
}
I created a Java GUI that displays the table using the following syntax:
table = new JTable(new MyTableModel(columnNames,
updateTable(cmbAdversary.getSelectedItem().toString(),
cmbdataType.getSelectedItem().toString())));
where columnNames is a Vector of Strings
cmbadversary and smbdataType are the selection od combo boxes.
and updateTable is a method that returns a Vector of Vectors depending on the combo box selection as follows:
static Vector updateTable(String FilterVal1 , String FilterVal2)
{
try {
myVector = tssc.testSeverityFunctionService(FilterVal1,FilterVal2);
} catch (Exception e) {
e.printStackTrace();}
return myVector;
}
This is how my custom class MyTableModel that extends AbstractTableModel looks like:
class MyTableModel extends AbstractTableModel
{
Vector columnNames = new Vector();
Vector Fdb = new Vector();
public MyTableModel(Vector cName,Vector rName){
this.columnNames = cName;
this.Fdb = rName;}
public int getColumnCount() { // number of columns in the model.
return columnNames.size();
}
public int getRowCount() { // number of rows in the model.
return Fdb.size();
}
#Override
public String getColumnName(int col) {
return columnNames.get(col).toString();
}
public Object getValueAt(int row, int col) {
Vector v = (Vector) this.Fdb.get(row);
return v.get(col);
}
#Override
public Class getColumnClass(int c) {
Vector v = (Vector) Fdb.get(0);
return v.get(c).getClass();}
public boolean isCellEditable(int row, int col)
{ return true; }
public void setValueAt(Vector value, int row, int col)
{
for(int i=0;i<value.size();i++)
{ for(int j=0;j<columnNames.size();j++) {
Fdb.setElementAt(value.get(j),j); }
}
fireTableCellUpdated(row, col);
}
}
The problem is that when I run the code, the table GUI show me initial values but fails to update when I change the selection in the 2 comboboxes and click the selection button.
The Selection button, btw, calls a method which implements the action listener.
Please help me out. Am no pro in Java, but willing to learn. If you have any followup qs., I'll be happy to provide details.
Your solution seems overly complicated. If I understand the basics, the user chooses a value from a combo box, then based on the selection some data is loaded into the table.
There is no need to create a custom table model to do this.
A TableModel contains data. If you want to change the data, then one way to do this is to simply create a new TableModel. So you add an ActionListener to your combo box. When an item is selected you retrive your data and load the data into an Vector or an Array. Using this data you can create a new TableModel and update the JTable in two lines of code:
DefaultTableModel model = new DefaultTableModel(...);
table.setModel( model );
If you need to customize the model to override the getColumnClass() or isCellEditable() methods, then you should extend the DefaultTableModel. I don't see any need to implement the whole model.